{"id":38443,"date":"2023-11-20T16:24:13","date_gmt":"2023-12-11T11:12:59","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react-typescript%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%95%88%e6%9e%9c%e8%bf%9b%e8%a1%8c%e5%90%8c%e6%ad%a5\/"},"modified":"2024-05-04T10:00:38","modified_gmt":"2024-05-04T02:00:38","slug":"%e4%bd%bf%e7%94%a8react-typescript%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%95%88%e6%9e%9c%e8%bf%9b%e8%a1%8c%e5%90%8c%e6%ad%a5","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bd%bf%e7%94%a8react-typescript%ef%bc%9a%e4%bd%bf%e7%94%a8%e6%95%88%e6%9e%9c%e8%bf%9b%e8%a1%8c%e5%90%8c%e6%ad%a5\/","title":{"rendered":"\u4f7f\u7528React + TypeScript\uff1a\u4f7f\u7528\u6548\u679c\u8fdb\u884c\u540c\u6b65"},"content":{"rendered":"<p>React\u5b98\u65b9\u7f51\u7ad9\u7684\u6587\u6863\u5df2\u4e8e2023\u5e743\u670816\u65e5\u8fdb\u884c\u4e86\u4fee\u8ba2\uff08\u53c2\u89c1\u300cIntroducing react.dev\u300d\uff09\u3002\u672c\u6587\u662f\u5bf9\u9ad8\u7ea7\u5e94\u7528\u4e2d\u300cSynchronizing with Effects\u300d\u7684\u7b80\u6d01\u603b\u7ed3\u3002\u7136\u800c\uff0c\u6211\u4eec\u5728\u4ee3\u7801\u4e2d\u52a0\u5165\u4e86TypeScript\uff0c\u540c\u65f6\u7701\u7565\u4e86\u9762\u5411\u521d\u5b66\u8005\u7684JavaScript\u57fa\u7840\u77e5\u8bc6\u89e3\u91ca\u3002<\/p>\n<p>\u8bf7\u53c2\u8003\u5176\u4ed6\u672c\u7cfb\u5217\u89e3\u8bf4\u6587\u7ae0\u4e2d\u7684\u201cReact + TypeScript: React\u516c\u5f0f\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8\u7684\u57fa\u7840\u89e3\u8bf4\u300a\u5b66\u4e60React\u300b\u201d\u6765\u4e86\u89e3\u66f4\u591a\u4fe1\u606f\u3002<\/p>\n<p>\u67d0\u4e9b\u7ec4\u4ef6\u9700\u8981\u4e0e\u5916\u90e8\u7cfb\u7edf\u8fdb\u884c\u540c\u6b65\uff0c\u4f8b\u5982\u4ee5\u4e0b\u60c5\u51b5\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">React\u4ee5\u5916\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u72b6\u614b\u306b\u3082\u3068\u3065\u3044\u3066\u5236\u5fa1\u3057\u305f\u3044\u3068\u304d\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b5\u30fc\u30d0\u30fc\u3068\u306e\u63a5\u7d9a\u3092\u78ba\u7acb\u3057\u305f\u3044\u3068\u304d\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5206\u6790\u7528\u306e\u30ed\u30b0\u3092\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u753b\u9762\u306b\u8868\u793a\u3055\u308c\u305f\u3089\u9001\u308a\u305f\u3044\u3068\u304d\u3002<\/ul>\n<p>\u5728\u6e32\u67d3\u5b8c\u6210\u540e\uff0c\u6548\u679c\u4f1a\u6267\u884c\u5176\u4ee3\u7801\u3002\u8fd9\u6837\uff0c\u5b83\u53ef\u4ee5\u4e0eReact\u4e4b\u5916\u7684\u7cfb\u7edf\u548c\u7ec4\u4ef6\u8fdb\u884c\u540c\u6b65\u3002<\/p>\n<h1>\u300c\u6548\u679c\u300d\u548c\u300c\u4e8b\u4ef6\u300d\u7684\u533a\u522b\u662f\u4ec0\u4e48\u3002<\/h1>\n<p>\u5728\u89e3\u91ca\u7279\u6548\u4e4b\u524d\uff0c\u8ba9\u6211\u4eec\u5148\u7406\u89e3React\u7ec4\u4ef6\u5185\u7684\u4e24\u4e2a\u903b\u8f91\u3002<\/p>\n<p>\u30b3\u30fc\u30c9\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0: \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u30c8\u30c3\u30d7\u30ec\u30d9\u30eb\u306b\u5b58\u5728\u3057\u307e\u3059(\u300cReact + TypeScript: \u30e6\u30fc\u30b6\u30fc\u30a4\u30f3\u30bf\u30d5\u30a7\u30fc\u30b9\u3092\u7d44\u307f\u7acb\u3066\u308b\u300d\u53c2\u7167)\u3002\u30d7\u30ed\u30d1\u30c6\u30a3\u3084\u72b6\u614b\u3092\u53d7\u3051\u53d6\u308a\u3001\u5909\u63db\u3057\u3066\u3001\u753b\u9762\u306b\u8868\u793a\u3059\u3079\u304dJSX\u3092\u8fd4\u3059\u306e\u304c\u3053\u306e\u5834\u6240\u3067\u3059\u3002\u30b3\u30fc\u30c9\u306e\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u306f\u7d14\u7c8b\u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u6570\u5f0f\u3068\u540c\u3058\u304f\u3001\u7d50\u679c\u3092\u5c0e\u51fa\u3059\u308b\u3060\u3051\u3067\u3059\u3002\u4ed6\u306e\u3053\u3068\u306f\u884c\u3044\u307e\u305b\u3093\u3002<\/p>\n<p>\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9: \u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u4e2d\u306b\u542b\u307e\u308c\u305f\u95a2\u6570\u3067\u3059(\u300cReact + TypeScript: \u767a\u751f\u3057\u305f\u30a4\u30d9\u30f3\u30c8\u3092\u51e6\u7406\u3059\u308b\u300d\u53c2\u7167)\u3002\u7d14\u7c8b\u306a\u8a08\u7b97\u4ee5\u5916\u306e\u51e6\u7406\u3082\u884c\u3044\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u7528\u9014\u3067\u3059\u3002\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u306f\u526f\u4f5c\u7528(\u30d7\u30ed\u30b0\u30e9\u30e0\u306e\u72b6\u614b\u5909\u66f4)\u3092\u542b\u307f\u307e\u3059\u3002\u5b9f\u884c\u3092\u5f15\u304d\u8d77\u3053\u3059\u306e\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u7279\u5b9a\u306e\u30a2\u30af\u30b7\u30e7\u30f3(\u305f\u3068\u3048\u3070\u3001\u30dc\u30bf\u30f3\u30af\u30ea\u30c3\u30af\u3084\u30ad\u30fc\u30dc\u30fc\u30c9\u5165\u529b)\u3067\u3059\u3002<\/p>\n<p>\u30c6\u30ad\u30b9\u30c8\u5165\u529b\u30d5\u30a3\u30fc\u30eb\u30c9\u306e\u66f4\u65b0\u3002<br \/>\n\u5546\u54c1\u3092\u8cfc\u5165\u3059\u308b\u305f\u3081\u306eHTTP POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1\u3002<br \/>\n\u30e6\u30fc\u30b6\u30fc\u306e\u5225\u753b\u9762\u3078\u306e\u9077\u79fb\u3002<\/p>\n<p>\u7136\u800c\uff0c\u4ec5\u51ed\u8fd9\u4e24\u4e2a\u7ec4\u4ef6\u8fd8\u4e0d\u8db3\u591f\u3002\u8ba9\u6211\u4eec\u8003\u8651\u4e00\u4e0b ChatRoom \u7ec4\u4ef6\u3002\u5f53\u5b83\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\u65f6\uff0c\u5fc5\u987b\u59cb\u7ec8\u4e0e\u670d\u52a1\u5668\u8fde\u63a5\u3002\u7531\u4e8e\u8fde\u63a5\u670d\u52a1\u5668\u4e0d\u662f\u7eaf\u7cb9\u7684\u8ba1\u7b97\uff08\u56e0\u4e3a\u5b83\u6d89\u53ca\u526f\u4f5c\u7528\uff09\uff0c\u6240\u4ee5\u65e0\u6cd5\u5728\u6e32\u67d3\u8fc7\u7a0b\u4e2d\u8fdb\u884c\u3002\u7136\u800c\uff0c\u4e5f\u6ca1\u6709\u7279\u5b9a\u7684\u4e8b\u4ef6\uff08\u5982\u70b9\u51fb\uff09\u6765\u89e6\u53d1\u663e\u793a ChatRoom\u3002<\/p>\n<p>\u7279\u6548\u5b9a\u4e49\u4e86\u526f\u4f5c\u7528\uff0c\u5e76\u4e14\u5728\u7279\u5b9a\u4e8b\u4ef6\u4e4b\u5916\uff0c\u5728\u6e32\u67d3\u81ea\u8eab\u65f6\u6267\u884c\u3002\u901a\u8fc7\u804a\u5929\u53d1\u9001\u6d88\u606f\u662f\u4e00\u4e2a\u4e8b\u4ef6\uff0c\u7531\u7528\u6237\u70b9\u51fb\u7279\u5b9a\u7684\u6309\u94ae\u5f15\u53d1\u3002\u76f8\u6bd4\u4e4b\u4e0b\uff0c\u4e0e\u670d\u52a1\u5668\u5efa\u7acb\u8fde\u63a5\u662f\u4e00\u4e2a\u7279\u6548\u3002\u670d\u52a1\u5668\u8fde\u63a5\u4e0e\u7ec4\u4ef6\u5c55\u793a\u7684\u4e92\u52a8\u65b9\u5f0f\u65e0\u5173\u3002\u7279\u6548\u7684\u6267\u884c\u5728\u63d0\u4ea4\u7ed3\u675f\u4e4b\u540e\uff0c\u5c4f\u5e55\u66f4\u65b0\u540e\u8fdb\u884c\u3002\u53ef\u4ee5\u8bf4\uff0c\u8fd9\u662f\u4e0e\u5916\u90e8\u7cfb\u7edf\uff08\u5982\u7f51\u7edc\u548c\u7b2c\u4e09\u65b9\u5e93\uff09\u540c\u6b65React\u7ec4\u4ef6\u7684\u6700\u5408\u9002\u65f6\u673a\u3002<\/p>\n<p>\u3010\u6ce8\u3011\u5728\u63a5\u4e0b\u6765\u7684\u8bf4\u660e\u4e2d\uff0c&#8221;Effect&#8221;\u6307\u7684\u662fReact\u56fa\u6709\u7684\u5b9a\u4e49\uff0c\u5373\u57fa\u4e8e\u6e32\u67d3\u7684\u526f\u4f5c\u7528\u3002\u5728\u5e7f\u4e49\u7684\u7f16\u7a0b\u6982\u5ff5\u4e2d\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a&#8221;\u526f\u4f5c\u7528&#8221;\u3002<\/p>\n<h1>\u6709\u65f6\u5019\u4e0d\u9700\u8981\u6548\u679c\u3002<\/h1>\n<p>\u5c06\u6548\u679c\u7acb\u5373\u6dfb\u52a0\u5230\u7ec4\u4ef6\u4e2d\u5e76\u4e0d\u660e\u667a\u3002\u901a\u5e38\uff0c\u6548\u679c\u7528\u4e8e\u4eceReact\u4e2d\u201c\u51fa\u53bb\u201d\u3002\u6bd4\u5982\uff0c\u4e0e\u4e0b\u9762\u7684\u5916\u90e8\u7cfb\u7edf\u540c\u6b65\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d6\u30e9\u30a6\u30b6API\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b5\u30fc\u30c9\u30d1\u30fc\u30c6\u30a3\u306e\u30a6\u30a3\u30b8\u30a7\u30c3\u30c8\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306a\u3069\u3002<\/ul>\n<p>\u5982\u679c\u7279\u6548\u53ea\u662f\u57fa\u4e8e\u4e00\u79cd\u72b6\u6001\u6765\u8c03\u6574\u53e6\u4e00\u79cd\u72b6\u6001\uff0c\u90a3\u53ef\u80fd\u662f\u4e0d\u5fc5\u8981\u7684\u3002<\/p>\n<h1>\u7279\u6548\u7684\u4e66\u5199\u65b9\u6cd5<\/h1>\n<p>\u6548\u679c\u5e94\u6309\u7167\u4ee5\u4e0b\u4e09\u4e2a\u6b65\u9aa4\u4e66\u5199\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u8bf7\u58f0\u660e\u7279\u6548\u3002\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u7279\u6548\u7684\u6267\u884c\u662f\u5728\u6bcf\u6b21\u6e32\u67d3\u7ed3\u675f\u540e\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>\u6307\u5b9a\u7279\u6548\u7684\u4f9d\u8d56\u6570\u7ec4\u3002\u5927\u591a\u6570\u7279\u6548\u5e94\u8be5\u53ea\u5728\u9700\u8981\u65f6\u91cd\u65b0\u6267\u884c\u3002\u4e0d\u9700\u8981\u5728\u6bcf\u6b21\u6e32\u67d3\u540e\u5904\u7406\u3002\u4f8b\u5982\uff0c\u6de1\u5165\u52a8\u753b\u5e94\u8be5\u5728\u7ec4\u4ef6\u663e\u793a\u65f6\u5f00\u59cb\u3002\u8fde\u63a5\u6216\u65ad\u5f00\u804a\u5929\u5ba4\u662f\u5728\u7ec4\u4ef6\u663e\u793a\/\u9690\u85cf\u6216\u804a\u5929\u5ba4\u53d8\u5316\u65f6\u8fdb\u884c\u7684\u3002\u6709\u5173\u4f7f\u7528\u4f9d\u8d56\u6570\u7ec4\u63a7\u5236\u7684\u65b9\u6cd5\u5c06\u5728\u540e\u9762\u4ecb\u7ecd\u3002<\/p>\n<p>\u5fc5\u8981\u65f6\u9700\u8981\u8fdb\u884c\u6e05\u7406\u3002\u67d0\u4e9b\u7279\u6548\u53ef\u80fd\u9700\u8981\u505c\u6b62\u3001\u64a4\u6d88\u6216\u5b9a\u4e49\u6e05\u7406\u65b9\u6cd5\u3002\u4f8b\u5982\uff0c\u8fde\u63a5\u9700\u8981\u65ad\u5f00\uff0c\u6ce8\u518c\u9700\u8981\u89e3\u9664\uff0c\u83b7\u53d6\u53ef\u80fd\u9700\u8981\u53d6\u6d88\u6216\u5ffd\u7565\u540e\u7eed\u5904\u7406\u3002\u6e05\u7406\u51fd\u6570\u5e94\u4ece\u7279\u6548\u4e2d\u8fd4\u56de\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u5177\u4f53\u5730\u770b\u4e00\u4e0b\u4e09\u4e2a\u6b65\u9aa4\u3002<\/p>\n<h2>\u6b65\u9aa41\uff1a\u5ba3\u5e03\u6548\u679c<\/h2>\n<p>\u5728\u7ec4\u4ef6\u4e2d\u58f0\u660e\u6548\u679c\uff0c\u8bf7\u9996\u5148\u4eceReact\u4e2d\u5bfc\u5165useEffect\u94a9\u5b50\u3002\u7136\u540e\uff0c\u5728\u7ec4\u4ef6\u7684\u9876\u5c42\u8c03\u7528\u8be5\u94a9\u5b50\u3002\u5c06\u4ee3\u7801\u6dfb\u52a0\u5230\u56de\u8c03\u51fd\u6570\u7684\u53c2\u6570\u4f53\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">useEffect<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"kd\">function<\/span> <span class=\"nf\">MyComponent<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"c1\">\/\/ \u6bce\u56de\u306e\u30ec\u30f3\u30c0\u30fc\u304c\u7d42\u308f\u3063\u305f\u3042\u3068\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n\t<span class=\"p\">});<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6bcf\u5f53\u7ec4\u4ef6\u6e32\u67d3\u65f6\uff0cReact\u4f1a\u66f4\u65b0\u5c4f\u5e55\uff0c\u7136\u540e\u6267\u884cuseEffect\u4e2d\u7684\u4ee3\u7801\u3002\u6362\u53e5\u8bdd\u8bf4\uff0cuseEffect\u80fd\u591f\u5c06\u4ee3\u7801\u7684\u6267\u884c\u76f4\u5230\u6e32\u67d3\u7ed3\u679c\u5448\u73b0\u5728\u5c4f\u5e55\u4e0a\u4e4b\u540e\u8fdb\u884c&#8221;\u5ef6\u8fdf&#8221;\u3002<\/p>\n<p>\u8ba9\u6211\u4eec\u4f7f\u7528\u6548\u679c\u4ee5\u786e\u4fdd\u4e0e\u5916\u90e8\u7cfb\u7edf\u540c\u6b65\u3002\u6211\u4eec\u6765\u8003\u8651\u4e00\u4e2a\u64ad\u653e\u89c6\u9891\u7684\u7ec4\u4ef6\u3002\u4f20\u9012\u7ed9\u8be5\u7ec4\u4ef6\u7684\u5c5e\u6027isPlaying\u662f\u4e00\u4e2a\u63a7\u5236\u64ad\u653e\u548c\u505c\u6b62\u7684\u5e03\u5c14\u72b6\u6001\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setIsPlaying<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"p\">&lt;&gt;<\/span>\r\n\t\t\t<span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setIsPlaying<\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\r\n\t\t\t\t<span class=\"si\">{<\/span><span class=\"nx\">isPlaying<\/span> <span class=\"p\">?<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Pause<\/span><span class=\"dl\">'<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Play<\/span><span class=\"dl\">'<\/span><span class=\"si\">}<\/span>\r\n\t\t\t<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\r\n\t\t\t<span class=\"p\">&lt;<\/span><span class=\"nc\">VideoPlayer<\/span>\r\n\t\t\t\t<span class=\"na\">isPlaying<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">isPlaying<\/span><span class=\"si\">}<\/span>\r\n\t\t\t\t<span class=\"na\">src<\/span><span class=\"p\">=<\/span><span class=\"s\">\"\u30d3\u30c7\u30aa\u30d5\u30a1\u30a4\u30eb\u306e\u30d1\u30b9\"<\/span>\r\n\t\t\t<span class=\"p\">\/&gt;<\/span>\r\n\t\t<span class=\"p\">&lt;\/&gt;<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>VideoPlayer\u7ec4\u4ef6\u4f1a\u5728JSX\u4e2d\u8fd4\u56de\u4e00\u4e2a\u5185\u5d4c\u5728\u6d4f\u89c8\u5668\u4e2d\u7684<video width=\"300\" height=\"150\">\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ isPlaying\u3068\u30d3\u30c7\u30aa\u518d\u751f\u3092\u540c\u671f\u3055\u305b\u308b<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">video<\/span> <span class=\"na\">src<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">src<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u800c\uff0cisPlaying\u5e76\u4e0d\u662f<video>\u5143\u7d20\u7684\u5c5e\u6027\u3002\u8981\u64ad\u653e\u6216\u505c\u6b62\u89c6\u9891\uff0c\u9700\u8981\u8c03\u7528DOM\u5143\u7d20<video>\u7684play()\u548cpause()\u65b9\u6cd5\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u8868\u793a\u89c6\u9891\u64ad\u653e\/\u505c\u6b62\u72b6\u6001\u7684\u53d8\u91cfisPlaying\u5fc5\u987b\u4e0eplay()\u548cpause()\u65b9\u6cd5\u540c\u6b65\u3002<\/video><\/video><\/p>\n<p>\u4e3a\u4e86\u8fbe\u5230\u8fd9\u4e2a\u76ee\u7684\uff0c\u9996\u5148\u6211\u4eec\u8981\u83b7\u5f97DOM\u8282\u70b9<video>\u7684ref\u3002\u7136\u540e\uff0c\u6839\u636e\u5c5e\u6027\u503c\uff0c\u53ef\u4ee5\u8c03\u7528<video>\u5143\u7d20\u7684play()\u548cpause()\u65b9\u6cd5\u3002<\/video><\/video><\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">ref<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">useRef<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">HTMLVideoElement<\/span><span class=\"o\">&gt;<\/span><span class=\"p\">(<\/span><span class=\"kc\">null<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">ref:<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u78ba\u8a8d\u7528<\/span>\r\n\t<span class=\"c1\">\/\/ \u30ec\u30f3\u30c0\u30fc\u4e2d\u306bDOM\u30ce\u30fc\u30c9\u3092\u64cd\u4f5c\u3059\u3079\u304d\u3067\u306f\u306a\u3044<\/span>\r\n\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">play<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">pause<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">}<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">video<\/span> <span class=\"na\">ref<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">ref<\/span><span class=\"si\">}<\/span> <span class=\"na\">src<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">src<\/span><span class=\"si\">}<\/span> <span class=\"na\">loop<\/span> <span class=\"na\">playsInline<\/span> <span class=\"p\">\/&gt;;<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u4f7f\u7528\u8fd9\u6bb5\u4ee3\u7801\uff0c\u4f60\u53ef\u4ee5\u64ad\u653e\u548c\u505c\u6b62VideoPlayer\u7ec4\u4ef6\u7684\u89c6\u9891\u3002\u4f46\u662f\uff0c\u8fd9\u6bb5\u4ee3\u7801\u5e76\u4e0d\u7406\u60f3\u3002\u901a\u8fc7\u6dfb\u52a0\u7684console.log()\u7528\u4e8e\u786e\u8ba4\uff0c\u63a7\u5236\u53f0\u5e94\u8be5\u9996\u5148\u663e\u793a\u4ee5\u4e0b\u8f93\u51fa\u3002<\/p>\n<blockquote><p>\u53c2\u8003\uff1a\u65e0<\/p><\/blockquote>\n<p>\u5f53VideoPlayer\u7ec4\u4ef6\u5728\u9996\u6b21\u6e32\u67d3\u65f6\uff0cDOM\u8fd8\u4e0d\u5b58\u5728\u65f6\uff0c\u610f\u5473\u7740\u6b63\u5728\u5c1d\u8bd5\u64cd\u4f5cref.current\u3002\u5728React\u4e2d\uff0c\u6e32\u67d3\u5fc5\u987b\u662fJSX\u7684\u7eaf\u8ba1\u7b97\uff0c\u5e94\u8be5\u907f\u514d\u5305\u542b\u526f\u4f5c\u7528\uff0c\u5982DOM\u64cd\u4f5c\u3002<\/p>\n<p>\u5f53\u9996\u6b21\u8c03\u7528VideoPlayer\u65f6\uff0c\u5c1a\u4e0d\u5b58\u5728DOM\u3002React\u5728\u8fd4\u56deJSX\u4e4b\u524d\uff0c\u65e0\u6cd5\u786e\u5b9a\u5e94\u8be5\u521b\u5efa\u4ec0\u4e48\u6837\u7684DOM\u3002<\/p>\n<p>\u3010\u6ce8\u610f\u3011\u5728\u5b98\u65b9\u7f51\u7ad9\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u4f1a\u8fd4\u56de\u9519\u8bef\u3002\u8fd9\u662f\u56e0\u4e3a\u5b83\u7701\u7565\u4e86\u5224\u65adref.current\u662f\u5426\u4e3anull\u7684\u6b65\u9aa4\u3002<\/p>\n<p>\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u4eec\u53ef\u4ee5\u5c06\u526f\u4f5c\u7528\u653e\u5728useEffect\u91cc\u9762\uff0c\u5e76\u5c06\u5176\u4ece\u6e32\u67d3\u8ba1\u7b97\u8fc7\u7a0b\u4e2d\u5206\u79bb\u51fa\u6765\u3002\u8fd9\u6837\uff0cconsole.log()\u5230\u63a7\u5236\u53f0\u7684null\u8f93\u51fa\u5e94\u8be5\u4f1a\u6d88\u5931\uff08\u793a\u4f8b001\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">ref:<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u78ba\u8a8d\u7528<\/span>\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">play<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">pause<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"p\">});<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<h4>React + TypeScript: \u4f7f\u7528Effects\u8fdb\u884c\u540c\u6b65\u7684\u793a\u4f8b001<\/h4>\n<p><a><\/a><\/p>\n<p>DOM\u7684\u66f4\u6539\u88ab\u5305\u88f9\u5728\u6548\u679c\u4e2d\u3002\u7136\u540e\uff0cReact\u9996\u5148\u66f4\u65b0\u5c4f\u5e55\u3002\u4e4b\u540e\u6267\u884c\u6548\u679c\u3002<\/p>\n<p>\u5f53<videoplayer>\u7ec4\u4ef6\u88ab\u6e32\u67d3\u65f6\uff08\u5305\u62ec\u9996\u6b21\u6e32\u67d3\u548c\u91cd\u65b0\u6e32\u67d3\uff09\uff0c\u5c06\u6267\u884c\u4ee5\u4e0b\u64cd\u4f5c\u3002<\/videoplayer><\/p>\n<ul class=\"post-ul\">\n\u307e\u305a\u3001React\u306b\u3088\u308b\u753b\u9762\u306e\u66f4\u65b0\u3067\u3059\u3002\u3053\u308c\u3067\u3001DOM\u306e\u4e2d\u306b<video>\u8981\u7d20\u304c\u6b63\u3057\u3044\u30d7\u30ed\u30d1\u30c6\u30a3\u3092\u3082\u3063\u3066\u5099\u308f\u308a\u307e\u3059\u3002<br \/>\n\u3064\u304e\u306b\u3001React\u304c\u5b9f\u884c\u3059\u308b\u306e\u306f\u30a8\u30d5\u30a7\u30af\u30c8\u3067\u3059\u3002<br \/>\n\u305d\u306e\u3046\u3048\u3067\u3001\u30a8\u30d5\u30a7\u30af\u30c8\u306fplay()\u307e\u305f\u306fpause()\u30e1\u30bd\u30c3\u30c9\u3092\u3001isPlaying\u306e\u5024\u306b\u5fdc\u3058\u3066\u547c\u3073\u51fa\u3057\u307e\u3059\u3002<br \/>\n<\/video><\/ul>\n<p>\u5728\u8fd9\u4e2a\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u5c06React\u7684\u72b6\u6001\u4e0e&#8221;\u5916\u90e8\u7cfb\u7edf&#8221;\u540c\u6b65\u7684\u662f\u6d4f\u89c8\u5668\u7684\u5a92\u4f53API\u3002\u5f53\u6211\u4eec\u5c06\u975eReact\u7684\u4f20\u7edf\u4ee3\u7801\uff08\u5982jQuery\u63d2\u4ef6\u7b49\uff09\u5305\u88c5\u5728\u58f0\u660e\u6027\u7684React\u7ec4\u4ef6\u4e2d\u65f6\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528\u7c7b\u4f3c\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u6b64\u5916\uff0c\u89c6\u9891\u64ad\u653e\u5668\u7684\u63a7\u5236\u5b9e\u9645\u4e0a\u66f4\u52a0\u590d\u6742\u3002\u8c03\u7528play()\u53ef\u80fd\u4f1a\u5931\u8d25\u3002\u7528\u6237\u53ef\u80fd\u4f1a\u4f7f\u7528\u6d4f\u89c8\u5668\u5185\u7f6e\u7684\u63a7\u4ef6\u8fdb\u884c\u64ad\u653e\u6216\u6682\u505c\u64cd\u4f5c\u3002\u8bf7\u6ce8\u610f\uff0c\u6b64\u4ee3\u7801\u793a\u4f8b\u662f\u975e\u5e38\u7b80\u5316\u548c\u4e0d\u5b8c\u5168\u7684\u3002<\/p>\n<h3>\u5f53\u60a8\u4f7f\u7528\u6548\u679c\u6765\u8bbe\u7f6e\u72b6\u6001\u65f6\uff0c\u4f1a\u9677\u5165\u65e0\u9650\u5faa\u73af\u7684\u60c5\u51b5\u3002<\/h3>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6548\u679c\u4f1a\u5728\u6bcf\u6b21\u6e32\u67d3\u540e\u6267\u884c\u3002\u56e0\u6b64\uff0c\u4ee5\u4e0b\u4ee3\u7801\u4f1a\u9677\u5165\u65e0\u9650\u5faa\u73af\u3002<\/p>\n<blockquote><p>\u8b66\u544a\uff1a\u8d85\u51fa\u4e86\u6700\u5927\u66f4\u65b0\u6df1\u5ea6\u3002<\/p><\/blockquote>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">count<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setCount<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"mi\">0<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nf\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"p\">});<\/span>\r\n\t\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6267\u884c\u6548\u679c\u662f\u6e32\u67d3\u7684\u7ed3\u679c\u3002\u8bbe\u5b9a\u72b6\u6001\u4f1a\u5f15\u53d1\u6e32\u67d3\u3002\u4f46\u662f\uff0c\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff0c\u6b63\u5728\u6e32\u67d3\u7684\u6548\u679c\u4e2d\u6539\u53d8\u4e86\u72b6\u6001\u3002\u8fd9\u5c06\u518d\u6b21\u5f15\u53d1\u6e32\u67d3\u3002\u8fd9\u79cd\u5faa\u73af\u662f\u65e0\u9650\u7684\u3002<\/p>\n<p>\u4e00\u822c\u800c\u8a00\uff0c\u6548\u679c\u901a\u5e38\u7528\u4e8e\u5c06\u7ec4\u4ef6\u4e0e\u5916\u90e8\u7cfb\u7edf\u8fdb\u884c\u540c\u6b65\u3002\u5982\u679c\u6ca1\u6709\u5916\u90e8\u7cfb\u7edf\uff0c\u4ec5\u60f3\u5c06\u4e00\u79cd\u72b6\u6001\u8c03\u6574\u4e3a\u53e6\u4e00\u79cd\u72b6\u6001\uff0c\u53ef\u80fd\u5c31\u4e0d\u9700\u8981\u6548\u679c\u3002<\/p>\n<h2>\u6b65\u9aa42\uff1a\u6307\u5b9a\u6548\u679c\u7684\u4f9d\u8d56\u6570\u7ec4<\/h2>\n<p>\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0c\u6548\u679c\u4f1a\u5728\u6bcf\u6b21\u6e32\u67d3\u540e\u6267\u884c\u3002\u8fd9\u53ef\u80fd\u4e0d\u662f\u4f60\u6240\u671f\u671b\u7684\u3002<\/p>\n<ul class=\"post-ul\">\n\u51e6\u7406\u306e\u9045\u308c\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002\u5916\u90e8\u30b7\u30b9\u30c6\u30e0\u3068\u306f\u3059\u3050\u306b\u540c\u671f\u3067\u304d\u308b\u3068\u306f\u304b\u304e\u308a\u307e\u305b\u3093\u3002\u5fc5\u8981\u306a\u3051\u308c\u3070\u7701\u3044\u3066\u3057\u307e\u3063\u3066\u3082\u3088\u3055\u305d\u3046\u3067\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u30c1\u30e3\u30c3\u30c8\u30b5\u30fc\u30d0\u30fc\u306b\u3001\u30ad\u30fc\u5165\u529b\u3059\u308b\u305f\u3073\u306b\u63a5\u7d9a\u3057\u76f4\u3057\u305f\u3044\u3068\u306f\u8003\u3048\u306a\u3044\u3067\u3057\u3087\u3046\u3002<br \/>\n\u6bce\u56de\u306e\u30ec\u30f3\u30c0\u30fc\u5f8c\u306b\u5b9f\u884c\u3059\u308b\u306e\u304c\u9593\u9055\u3044\u306e\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u30d5\u30a7\u30fc\u30c9\u30a4\u30f3\u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u3092\u5b9a\u3081\u305f\u3068\u3057\u307e\u3057\u3087\u3046\u3002\u958b\u59cb\u306f\u30ad\u30fc\u5165\u529b\u3067\u306f\u306a\u304f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u306f\u3058\u3081\u3066\u8868\u793a\u3055\u308c\u305f1\u56de\u3060\u3051\u306b\u3059\u3079\u304d\u3067\u3059\u3002<\/ul>\n<p>\u524d\u8ff0\u7684\u793a\u4f8b001\u6ca1\u6709\u6307\u5b9auseEffect\u94a9\u5b50\u7684\u4f9d\u8d56\u6570\u7ec4\uff08\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff09\u3002\u4e3a\u4e86\u8bf4\u660e\u8fd9\u79cd\u60c5\u51b5\u4e0b\u7684\u95ee\u9898\uff0c\u8ba9\u6211\u4eec\u5728\u7236\u7ec4\u4ef6(App)\u4e2d\u6dfb\u52a0\u4e00\u4e2a\u6587\u672c\u8f93\u5165\u5b57\u6bb5(<input \/>)\u3002\u8f93\u5165\u7684\u6587\u672c\u5c06\u88ab\u4fdd\u5b58\u5728\u72b6\u6001\u53d8\u91cf(text)\u4e2d\u3002\u6bcf\u6b21\u952e\u5165\u6587\u672c\u65f6\uff0c\u6548\u679c\u90fd\u4f1a\u88ab\u8c03\u7528\uff0c\u5e76\u4e14\u5e94\u8be5\u80fd\u591f\u786e\u8ba4console.log()\u7684\u8f93\u51fa\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">ref:<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u78ba\u8a8d\u7528<\/span>\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">play<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">pause<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"p\">});<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">text<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setText<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"dl\">''<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"p\">&lt;&gt;<\/span>\r\n\t\t\t<span class=\"p\">&lt;<\/span><span class=\"nt\">input<\/span>\r\n\t\t\t\t<span class=\"na\">value<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">text<\/span><span class=\"si\">}<\/span>\r\n\t\t\t\t<span class=\"na\">onChange<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">({<\/span> <span class=\"na\">target<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">value<\/span> <span class=\"p\">}<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setText<\/span><span class=\"p\">(<\/span><span class=\"nx\">value<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span>\r\n\t\t\t<span class=\"p\">\/&gt;<\/span>\r\n\r\n\t\t<span class=\"p\">&lt;\/&gt;<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u5728`useEffect`\u94a9\u5b50\u51fd\u6570\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e2d\uff0c\u4f20\u5165\u5305\u542b\u4f9d\u8d56\u9879\u7684\u4f9d\u8d56\u6570\u7ec4\u3002\u53ea\u8981\u4f9d\u8d56\u9879\u4fdd\u6301\u4e0d\u53d8\uff0c\u8be5\u6548\u679c\u5c06\u4e0d\u4f1a\u88ab\u91cd\u590d\u6267\u884c\u3002\u9996\u5148\uff0c\u6211\u4eec\u5c1d\u8bd5\u4f20\u5165\u4e00\u4e2a\u7a7a\u6570\u7ec4`[]`\uff0c\u4e5f\u5c31\u662f\u6ca1\u6709\u4f9d\u8d56\u3002\u5728\u7ec4\u4ef6\u7684\u521d\u59cb\u6e32\u67d3\u540e\uff0c\u8be5\u6548\u679c\u5c06\u88ab\u6267\u884c\u4e00\u6b21\uff0c\u5e76\u4e14\u4e0d\u4f1a\u518d\u6b21\u6267\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">ref:<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u78ba\u8a8d\u7528<\/span>\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">play<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">pause<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"c1\">\/\/ });<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u800c\uff0c\u65e0\u8bba\u60a8\u8f93\u5165\u6587\u672c\u6216\u6309\u4e0b\u6309\u94ae\uff0c\u90fd\u4e0d\u4f1a\u53d1\u751f\u4efb\u4f55\u4e8b\u60c5\u3002\u539f\u56e0\u662f\uff0c\u4ee3\u7801\u68c0\u67e5\u5668\u901a\u8fc7\u4ee5\u4e0b\u8b66\u544a\u901a\u77e5\u6211\u4eec\uff1a\u5373\u4f7f\u6309\u4e0b\u6309\u94ae\u5bfc\u81f4\u4e86isPlaying\u503c\u7684\u53d8\u5316\uff0c\u4f46\u7531\u4e8e\u5b83\u6ca1\u6709\u5305\u542b\u5728\u4f9d\u8d56\u6570\u7ec4\u4e2d\uff0c\u6240\u4ee5useEffect\u4e0d\u4f1a\u91cd\u65b0\u6267\u884c\u3002<\/p>\n<blockquote><p>React Hook useEffect\u51fa\u73b0\u4e86\u4e00\u4e2a\u7f3a\u5c11\u7684\u4f9d\u8d56\u9879\uff1a&#8217;isPlaying&#8217;\u3002\u8981\u4e48\u5c06\u5176\u5305\u62ec\u5728\u5185\uff0c\u8981\u4e48\u5220\u9664\u4f9d\u8d56\u9879\u6570\u7ec4\u3002<\/p><\/blockquote>\n<p>\u6309\u7167\u6797\u5854\u7684\u6307\u793a\u5c06&#8221;isPlaying&#8221;\u6dfb\u52a0\u5230useEffect\u7684\u4f9d\u8d56\u6570\u7ec4(\u7b2c2\u4e2a\u53c2\u6570)\u4e2d(\u793a\u4f8b002)\u3002\u8fd9\u6837\uff0c\u53ea\u6709\u5f53\u6309\u94ae\u88ab\u6309\u4e0b\u4e14&#8221;isPlaying&#8221;\u7684\u503c\u4e0e\u4e0a\u6b21\u6e32\u67d3\u65f6\u7684\u503c\u4e0d\u540c\u65f6\uff0c\u624d\u4f1a\u6267\u884c\u6548\u679c\u3002\u7531\u4e8e\u8f93\u5165\u6587\u672c\u6846\u4e0d\u5f71\u54cd\u6548\u679c\u5bf9&#8221;text&#8221;\u7684\u4f9d\u8d56\uff0c\u56e0\u6b64\u5b83\u5c06\u88ab\u7701\u7565\u6267\u884c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span> <span class=\"c1\">\/\/ \u4f9d\u5b58\u5024<\/span>\r\n\r\n\t\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"c1\">\/\/}, []);<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">]);<\/span> <span class=\"c1\">\/\/ \u4f9d\u5b58\u5024\u306f\u4f9d\u5b58\u914d\u5217\u306b\u542b\u3081\u308b<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<h4>\u6837\u672c002 \u25a0 React + TypeScript\uff1a\u4e0eEffects 02\u540c\u6b65<\/h4>\n<p><a><\/a><\/p>\n<p>\u5728\u4f9d\u5b58\u6570\u7ec4\u4e2d\uff0c\u53ef\u4ee5\u6dfb\u52a0\u591a\u4e2a\u4f9d\u5b58\u503c\u3002\u5728\u91cd\u65b0\u6267\u884cReact\u6548\u679c\u4e4b\u524d\uff0cReact\u4f1a\u68c0\u67e5\u6240\u6709\u7ed9\u5b9a\u7684\u4f9d\u5b58\u503c\u3002\u5982\u679c\u5b83\u4eec\u4e0e\u4e0a\u4e00\u6b21\u6e32\u67d3\u65f6\u5b8c\u5168\u76f8\u540c\uff0c\u90a3\u4e48\u6548\u679c\u5c06\u4e0d\u4f1a\u88ab\u91cd\u65b0\u6267\u884c\u3002\u8fd9\u65f6\uff0cReact\u4f7f\u7528\u7684\u662fObject.is\u6765\u6bd4\u8f83\u4f9d\u8d56\u503c\uff08\u53c2\u89c1&#8221;useEffect&#8221;\u7684&#8221;\u53c2\u8003&#8221;\uff09\u3002<\/p>\n<p>\u4f9d\u8d56\u503c\u4e0d\u662f\u968f\u610f&#8221;\u9009\u62e9&#8221;\u7684\u3002\u5982\u679c\u7ed9\u5b9a\u7684\u4f9d\u8d56\u503c\u4e0eReact\u671f\u671b\u7684\u4f9d\u8d56\u6570\u7ec4\u57fa\u4e8e\u6548\u679c\u5185\u7684\u4ee3\u7801\u4e0d\u5339\u914d\uff0c\u5219\u4f1a\u4ece\u4ee3\u7801\u68c0\u67e5\u5668\u4e2d\u6536\u5230\u8b66\u544a\u3002\u8fd9\u6837\u53ef\u4ee5\u68c0\u6d4b\u5230\u8bb8\u591a\u4ee3\u7801\u4e2d\u7684\u9519\u8bef\u3002\u5982\u679c\u5728\u6548\u679c\u4e2d\u6709\u4e0d\u60f3\u91cd\u65b0\u6267\u884c\u7684\u4ee3\u7801\uff0c\u8bf7\u91cd\u65b0\u7f16\u5199\u4ee5&#8221;\u4e0d\u4f9d\u8d56&#8221;\u7684\u65b9\u5f0f\u6765\u5b8c\u6210\u3002<\/p>\n<h2>\u4f7f\u7528Effect\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff08\u4f9d\u8d56\u6570\u7ec4\uff09<\/h2>\n<p>\u4f9d\u8d56\u6570\u7ec4\u662fuseEffect\u7684\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u6839\u636e\u6307\u5b9a\u7684\u65b9\u5f0f\u6267\u884c\u64cd\u4f5c\u3002\u503c\u5f97\u6ce8\u610f\u7684\u662f\uff0c\u6240\u8c13\u7684\u6302\u8f7d\u65f6\u662f\u6307\u7ec4\u4ef6\u88ab\u663e\u793a\u65f6\u7684\u60c5\u51b5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ \u6bce\u56de\u30ec\u30f3\u30c0\u30fc\u3055\u308c\u305f\u3042\u3068\u306b\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n<span class=\"p\">});<\/span> <span class=\"c1\">\/\/ \u7b2c2\u5f15\u6570\u306a\u3057<\/span>\r\n\r\n<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ \u30de\u30a6\u30f3\u30c8\u6642\u306e\u307f\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span> <span class=\"c1\">\/\/ \u7a7a\u306e\u4f9d\u5b58\u914d\u5217<\/span>\r\n\r\n<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ \u30de\u30a6\u30f3\u30c8\u6642\u3068\u3001a\u304bb\u306e\u5024\u304c\u524d\u56de\u306e\u30ec\u30f3\u30c0\u30fc\u304b\u3089\u5909\u308f\u3063\u305f\u5834\u5408\u306b\u5b9f\u884c\u3055\u308c\u308b<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">a<\/span><span class=\"p\">,<\/span> <span class=\"nx\">b<\/span><span class=\"p\">]);<\/span> <span class=\"c1\">\/\/ \u4f9d\u5b58\u5024\u3092\u914d\u5217\u306b\u52a0\u3048\u308b<\/span>\r\n<\/code><\/pre>\n<h3>ref\u53ef\u4ee5\u4e0d\u5305\u542b\u5728\u4f9d\u8d56\u6570\u7ec4\u4e2d\u3002<\/h3>\n<p>\u524d\u8ff0\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\u7684\u6548\u679c\u4e0d\u4ec5\u5f15\u7528\u4e86isPlaying\uff0c\u8fd8\u5f15\u7528\u4e86ref\u3002\u4f46\u662f\uff0c\u4ee3\u7801\u68c0\u67e5\u5de5\u5177\u5e76\u4e0d\u8981\u6c42\u5c06ref\u6dfb\u52a0\u5230\u4f9d\u8d56\u6570\u7ec4\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">VideoPlayer<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">src<\/span><span class=\"p\">,<\/span> <span class=\"nx\">isPlaying<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">play<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">?.<\/span><span class=\"nf\">pause<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">isPlaying<\/span><span class=\"p\">]);<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u662f\u56e0\u4e3aref\u5bf9\u8c61\u59cb\u7ec8\u4fdd\u6301\u4e0d\u53d8\u4e14\u76f8\u540c\u3002React\u786e\u4fdd\u4ece\u76f8\u540c\u7684useRef\u8c03\u7528\u4e2d\u83b7\u53d6\u7684\u5bf9\u8c61\u5728\u6bcf\u6b21\u6e32\u67d3\u4e2d\u59cb\u7ec8\u76f8\u540c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b83\u4e0d\u4f1a\u53d1\u751f\u53d8\u5316\uff0c\u4e5f\u4e0d\u4f1a\u5f15\u53d1\u6548\u679c\u7684\u91cd\u65b0\u6267\u884c\u3002\u56e0\u6b64\uff0c\u4e0d\u9700\u8981\u5c06ref\u5305\u542b\u5728\u4f9d\u8d56\u9879\u4e2d\uff0c\u4f46\u5373\u4f7f\u5305\u542b\u4e5f\u6ca1\u6709\u95ee\u9898\u3002<\/p>\n<p>useState\u8fd4\u56de\u7684\u6570\u7ec4\u7684\u7b2c\u4e8c\u4e2a\u5143\u7d20set\u51fd\u6570\u59cb\u7ec8\u4fdd\u6301\u4e0d\u53d8\uff0c\u56e0\u6b64\u7ecf\u5e38\u88ab\u7701\u7565\u5728\u4f9d\u8d56\u6570\u7ec4\u4e2d\u3002\u5982\u679c\u4e0d\u5305\u542b\u5728\u4f9d\u8d56\u503c\u4e2d\u4e5f\u4e0d\u4f1a\u6536\u5230linter\u7684\u8b66\u544a\uff0c\u662f\u5b89\u5168\u7684\uff0c\u53ef\u4ee5\u7701\u7565\u3002<\/p>\n<p>\u53ea\u6709\u5f53linter\u80fd\u591f\u786e\u5b9a\u5bf9\u8c61\u4e0d\u4f1a\u6539\u53d8\u65f6\uff0c\u6211\u4eec\u624d\u80fd\u59cb\u7ec8\u4ece\u4f9d\u8d56\u4e2d\u6392\u9664\u76f8\u540c\u7684\u5bf9\u8c61\u3002\u4f8b\u5982\uff0c\u5982\u679cref\u662f\u4ece\u7236\u7ec4\u4ef6\u4f20\u9012\u7684\uff0c\u90a3\u4e48\u5b83\u5fc5\u987b\u6dfb\u52a0\u5230\u4f9d\u8d56\u6570\u7ec4\u4e2d\u3002\u7236\u7ec4\u4ef6\u5e76\u4e0d\u603b\u662f\u4f20\u9012\u76f8\u540c\u7684\u5bf9\u8c61\uff0c\u800c\u662f\u6839\u636e\u6761\u4ef6\u53ef\u80fd\u9009\u62e9\u4e0d\u540c\u7684ref\u3002\u6362\u53e5\u8bdd\u8bf4\uff0ceffect\u53d6\u51b3\u4e8e\u63a5\u6536\u54ea\u4e2aref\u3002<\/p>\n<h1>\u6b65\u9aa43\uff1a\u6839\u636e\u9700\u8981\u8fdb\u884c\u6e05\u7406\u64cd\u4f5c\u3002<\/h1>\n<p>\u518d\u4e3e\u4e00\u4e2a\u4f8b\u5b50\uff0c\u5047\u8bbe\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aChatRoom\u7ec4\u4ef6\uff0c\u4e00\u65e6\u663e\u793a\u51fa\u6765\u5c31\u5fc5\u987b\u8fde\u63a5\u5230\u804a\u5929\u670d\u52a1\u5668\u3002createConnection()API\u4f1a\u8fd4\u56de\u4e00\u4e2a\u5177\u6709connect()(\u8fde\u63a5)\u548cdisconnect()(\u65ad\u5f00\u8fde\u63a5)\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002\u5728\u7ec4\u4ef6\u663e\u793a\u7ed9\u7528\u6237\u7684\u65f6\u95f4\u5185\uff0c\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u4fdd\u6301\u8fde\u63a5\uff1f<\/p>\n<p>\u9996\u5148\uff0c\u6211\u4eec\u4ece\u7279\u6548\u7684\u903b\u8f91\u89d2\u5ea6\u8003\u8651\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">});<\/span>\r\n<\/code><\/pre>\n<p>\u6bcf\u6b21\u6e32\u67d3\u4e4b\u540e\uff0c\u5982\u679c\u91cd\u590d\u8fde\u63a5\u5230\u804a\u5929\uff0c\u53ea\u4f1a\u589e\u52a0\u8d1f\u8f7d\u3002\u56e0\u6b64\uff0c\u89e3\u51b3\u65b9\u6cd5\u662f\u6dfb\u52a0\u4f9d\u8d56\u6570\u7ec4\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u6548\u679c\u5185\u7684\u4ee3\u7801\u4e2d\u6ca1\u6709\u4f7f\u7528\u5c5e\u6027\u6216\u72b6\u6001\u3002\u56e0\u6b64\uff0c\u4f9d\u8d56\u6570\u7ec4\u4e3a\u7a7a\u3002\u7136\u540e\uff0cReact\u4ec5\u5728\u7ec4\u4ef6\u7b2c\u4e00\u6b21\u88ab\u6302\u8f7d\u5e76\u663e\u793a\u5728\u5c4f\u5e55\u4e0a\u65f6\u624d\u6267\u884c\u6b64\u4ee3\u7801\uff08\u793a\u4f8b003\uff09\u3002<\/p>\n<h4>React + TypeScript: \u6548\u679c\u540c\u6b65\u7684\u793a\u4f8b003<\/h4>\n<p><a><\/a><\/p>\n<p>console.log()\u51fd\u6570\u7528\u4e8e\u5728\u63a7\u5236\u53f0\u6253\u5370\u8f93\u51fa\uff0c\u6211\u4eec\u5728createConnection()(\u6a21\u5757chat.ts)\u8fd4\u56de\u7684connect()(\u2705 \u8fde\u63a5\u4e2d&#8230;)\u548cdisconnect()(\u274c \u5df2\u65ad\u5f00.)\u4e4b\u540e\uff0c\u4e3a\u4e86\u8fdb\u884c\u786e\u8ba4\u800c\u6dfb\u52a0\u3002\u63a7\u5236\u53f0\u8f93\u51fa\u5982\u4e0b\u6240\u793a\uff1aconnect()\u88ab\u8c03\u7528\u4e86\u4e24\u6b21\uff0c\u8fd9\u610f\u5473\u7740\u5df2\u7ecf\u8fde\u63a5\u6210\u529f\u3002<\/p>\n<blockquote><p>\u2705 \u8fde\u63a5\u4e2d&#8230;<br \/>\n\u2705 \u8fde\u63a5\u4e2d&#8230;<\/p><\/blockquote>\n<p>\u8fd9\u662f\u5173\u4e8eReact 18\u5f00\u53d1\u73af\u5883\u7684\u89c4\u8303\uff08\u201cReact + TypeScript: React 18\u4e2d\u7ec4\u4ef6\u6302\u8f7d\u65f6useEffect\u88ab\u6267\u884c\u4e24\u6b21\u201d\uff09\u3002\u8ba9\u6211\u4eec\u5c06ChatRoom\u7ec4\u4ef6\u89c6\u4e3a\u5927\u578b\u5e94\u7528\u7a0b\u5e8f\u7684\u4e00\u90e8\u5206\uff0c\u5177\u6709\u591a\u4e2a\u5c4f\u5e55\u3002<\/p>\n<ul class=\"post-ul\">\n\u30e6\u30fc\u30b6\u30fc\u304c\u3001ChatRoom\u30da\u30fc\u30b8\u304b\u3089\u95b2\u89a7\u3092\u59cb\u3081\u307e\u3057\u305f\u3002\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30de\u30a6\u30f3\u30c8\u3055\u308c\u3001connection.connect()\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u3064\u304e\u306b\u9077\u79fb\u3057\u305f\u306e\u306f\u5225\u306e\u753b\u9762\u3001\u305f\u3068\u3048\u3070\u8a2d\u5b9a\u30da\u30fc\u30b8\u3067\u3059\u3002<\/p>\n<p>ChatRoom\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306f\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u3055\u308c\u307e\u3059\u3002<\/p>\n<p>\u305d\u306e\u3046\u3048\u3067\u3001\u30e6\u30fc\u30b6\u304c\u623b\u308b\u30dc\u30bf\u30f3\u3092\u30af\u30ea\u30c3\u30af\u3057\u305f\u3089\u3069\u3046\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>ChatRoom\u304c\u518d\u3073\u30de\u30a6\u30f3\u30c8\u3055\u308c\u3001\u8a2d\u5b9a\u3055\u308c\u308b\u306e\u306f\u3075\u305f\u3064\u3081\u306e\u63a5\u7d9a\u3067\u3059\u3002<\/ul>\n<p>\u7136\u800c\uff0c\u7b2c\u4e00\u4e2a\u8fde\u63a5\u5e76\u6ca1\u6709\u88ab\u4e22\u5f03\u3002\u6bcf\u6b21\u7528\u6237\u5728\u5e94\u7528\u7a0b\u5e8f\u5185\u79fb\u52a8\u65f6\uff0c\u8fde\u63a5\u4f1a\u4e0d\u65ad\u91cd\u590d\u3002<\/p>\n<p>\u9664\u975e\u8fdb\u884c\u7ec6\u81f4\u5165\u5fae\u7684\u624b\u52a8\u6d4b\u8bd5\uff0c\u5426\u5219\u5f88\u96be\u53d1\u73b0\u6b64\u7c7b\u9519\u8bef\u3002\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0cReact\u5728\u5f00\u53d1\u73af\u5883\u4e2d\u4f1a\u5728\u9996\u6b21\u6302\u8f7d\u540e\u91cd\u65b0\u6302\u8f7d\u6240\u6709\u7ec4\u4ef6\u4e00\u6b21\u3002<\/p>\n<p>\u7531\u4e8e\u51fa\u73b0\u4e86\u4e24\u6b21&#8221;\u2705 Connecting&#8230;&#8221;\u7684\u65e5\u5fd7\u8f93\u51fa\uff0c\u6211\u6ce8\u610f\u5230\u4e86\u95ee\u9898\u3002\u4e5f\u5c31\u662f\u8bf4\uff0c\u5f53\u7ec4\u4ef6\u88ab\u5378\u8f7d\u65f6\uff0c\u6ca1\u6709\u5173\u95ed\u8fde\u63a5\u7684\u4ee3\u7801\u3002<\/p>\n<p>\u5f53\u7ec4\u4ef6\u5378\u8f7d\u65f6\uff0c\u5c06\u540e\u5904\u7406\u4f5c\u4e3a\u6e05\u7406\u51fd\u6570\u4eceuseEffect\u4e2d\u8fd4\u56de\uff08\u793a\u4f8b004\uff09\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">disconnect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">};<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728React\u4e2d\uff0c\u6bcf\u6b21\u91cd\u65b0\u6267\u884c\u6548\u679c\u4e4b\u524d\u90fd\u4f1a\u8c03\u7528\u6e05\u7406\u51fd\u6570\u3002\u800c\u6700\u540e\u4e00\u6b21\u8c03\u7528\u6e05\u7406\u51fd\u6570\u662f\u5728\u7ec4\u4ef6\u88ab\u5378\u8f7d\uff08\u4ece\u5c4f\u5e55\u4e0a\u79fb\u9664\uff09\u65f6\u3002<\/p>\n<h4>\u793a\u4f8b004\u25a0React + TypeScript\uff1a\u4e0eEffects\u540c\u6b65<\/h4>\n<p><a><\/a><\/p>\n<p>\u73b0\u5728\uff0c\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u5c06\u5728\u63a7\u5236\u53f0\u4e0a\u8f93\u51fa3\u6761\u65e5\u5fd7\u3002<\/p>\n<blockquote><p>\u2705 \u8fde\u63a5\u4e2d\u2026<br \/>\n\u274c \u8fde\u63a5\u5df2\u65ad\u5f00\u3002<br \/>\n\u2705 \u8fde\u63a5\u4e2d\u2026<\/p><\/blockquote>\n<p>\u5173\u4e8e\u8fd9\u4e2a\u52a8\u4f5c\uff0c\u6211\u6709\u4e24\u70b9\u8865\u5145\u3002<\/p>\n<p>\u8fd9\u662f\u5728\u5f00\u53d1\u73af\u5883\u4e2d\u7684\u6b63\u786e\u64cd\u4f5c\u3002\u901a\u8fc7\u91cd\u65b0\u6302\u8f7d\u7ec4\u4ef6\uff0cReact\u786e\u4fdd\u4e86\u5373\u4f7f\u4ece\u5176\u4ed6\u9875\u9762\u8fd4\u56de\u4e5f\u4e0d\u4f1a\u5bfc\u81f4\u4ee3\u7801\u9519\u8bef\u3002\u65ad\u5f00\u8fde\u63a5\u518d\u91cd\u65b0\u8fde\u63a5\u6b63\u662f\u6211\u4eec\u671f\u671b\u7684\u7ed3\u679c\u3002\u5982\u679c\u6e05\u7406\u5de5\u4f5c\u88ab\u6b63\u786e\u5b9e\u73b0\uff0c\u5bf9\u4e8e\u7528\u6237\u6765\u8bf4\u51e0\u4e4e\u770b\u4e0d\u51fa\u4e0b\u9762\u4e24\u4e2a\u6b65\u9aa4\u7684\u533a\u522b\u3002<\/p>\n<ul class=\"post-ul\">\n\u30a8\u30d5\u30a7\u30af\u30c8\u30921\u5ea6\u3060\u3051\u5b9f\u884c\u3002<br \/>\n\u30a8\u30d5\u30a7\u30af\u30c8\u5b9f\u884c\u5f8c\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3057\u305f\u3046\u3048\u3067\u518d\u5b9f\u884c\u3002<\/ul>\n<p>\u53ea\u5b58\u5728\u4e00\u7ec4\u989d\u5916\u7684\u8fde\u63a5\/\u65ad\u5f00\u8c03\u7528\u3002\u8fd9\u53ef\u4ee5\u7528\u6765\u68c0\u6d4b\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2dReact\u4ee3\u7801\u662f\u5426\u6f5c\u85cf\u7740\u9519\u8bef\u3002\u7531\u4e8e\u8fd9\u662f\u6b63\u5e38\u8fd0\u884c\u6240\u9700\u7684\uff0c\u6211\u4eec\u4e0d\u5e94\u8be5\u6392\u9664\u5b83\u3002<\/p>\n<p>\u5728\u6b63\u5f0f\u73af\u5883\u4e2d\uff0c\u201c\u2705 \u8fde\u63a5\u4e2d\u2026\u201d\u7684\u8f93\u51fa\u53ea\u4f1a\u53d1\u751f\u4e00\u6b21\u3002\u7ec4\u4ef6\u7684\u91cd\u65b0\u6302\u8f7d\u53ea\u4f1a\u5728\u5f00\u53d1\u65f6\u8fdb\u884c\uff0c\u5e76\u4e14\u53ef\u4ee5\u68c0\u67e5\u6548\u679c\u662f\u5426\u9700\u8981\u6e05\u7406\u3002StrictMode\u662f\u4e3a\u4e86\u6dfb\u52a0\u5f00\u53d1\u65f6\u7684\u529f\u80fd\u3002\u4f46\u8bf7\u4e0d\u8981\u53d6\u6d88\u6b64\u8bbe\u7f6e\uff0c\u56e0\u4e3a\u5b83\u6709\u52a9\u4e8e\u53d1\u73b0\u4e0a\u8ff0\u5404\u79cd\u9519\u8bef\u3002<\/p>\n<h1>\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u6b63\u786e\u5904\u7406\u4f1a\u88ab\u6267\u884c\u4e24\u6b21\u7684\u6548\u679c\u3002<\/h1>\n<p>React\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u6709\u610f\u5730\u91cd\u65b0\u88c5\u8f7d\u7ec4\u4ef6\uff0c\u901a\u8fc7\u8fd9\u79cd\u65b9\u5f0f\uff0c\u8fd8\u53d1\u73b0\u4e86\u524d\u9762\u7684\u4ee3\u7801\u4f8b\u5b50\u4e2d\u7684\u9519\u8bef\u3002\u56e0\u6b64\uff0c\u95ee\u5982\u4f55\u5728\u4e00\u6b21\u6267\u884c\u4e2d\u6267\u884c\u6548\u679c\u662f\u4e0d\u6b63\u786e\u7684\u3002\u5e94\u8be5\u8003\u8651\u5982\u4f55\u4fee\u6539\u6548\u679c\u4ee5\u4f7f\u5176\u5728\u91cd\u65b0\u88c5\u8f7d\u65f6\u80fd\u591f\u6b63\u5e38\u5de5\u4f5c\u3002<\/p>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u6267\u884c\u6e05\u7406\u51fd\u6570\u6765\u89e3\u51b3\u3002\u6e05\u7406\u51fd\u6570\u4f1a\u505c\u6b62\u6216\u64a4\u9500\u6548\u679c\u7684\u64cd\u4f5c\u3002\u76ee\u6807\u662f\u4f7f\u7528\u6237\u65e0\u9700\u610f\u8bc6\u5230\u4ee5\u4e0b\u4e24\u70b9\u7684\u5dee\u5f02\u3002<\/p>\n<ul class=\"post-ul\">\n\u30a8\u30d5\u30a7\u30af\u30c8\u304c1\u5ea6\u5b9f\u884c\u3055\u308c\u305f\u5834\u5408(\u672c\u756a\u74b0\u5883\u3068\u540c\u3058)\u3002<br \/>\n\u30a8\u30d5\u30a7\u30af\u30c8\u306e\u5b9f\u884c\u304c\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u3055\u308c\u3066\u518d\u5b9f\u884c\u3055\u308c\u305f\u5834\u5408(\u958b\u767a\u74b0\u5883\u3068\u540c\u3058)\u3002<\/ul>\n<p>\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u9047\u5230\u4e00\u4e2a\u9700\u8981\u8fd0\u884c\u4e24\u6b21\u7684\u6548\u679c\uff0c\u6211\u4eec\u5e94\u8be5\u5982\u4f55\u5e94\u5bf9\u5462\uff1f\u4e0b\u9762\u662f\u4e00\u4e2a\u5178\u578b\u7684\u4f8b\u5b50\u3002<\/p>\n<h2>\u63a7\u5236\u9664\u4e86React\u4ee5\u5916\u7684\u5c0f\u90e8\u4ef6\u3002<\/h2>\n<p>\u6709\u65f6\u5019\uff0c\u60a8\u53ef\u80fd\u60f3\u8981\u5728React\u4e2d\u6dfb\u52a0\u672a\u4f7f\u7528React\u7f16\u5199\u7684UI\u5c0f\u90e8\u4ef6\u3002\u4f8b\u5982\uff0c\u8ba9\u6211\u4eec\u5728\u9875\u9762\u4e2d\u63d2\u5165\u4e00\u4e2a\u5730\u56fe\u7ec4\u4ef6\u3002\u8be5\u7ec4\u4ef6\u5177\u6709setZoomLevel()\u65b9\u6cd5\uff0c\u8be5\u503c\u5fc5\u987b\u4e0eReact\u4ee3\u7801\u7684\u72b6\u6001\u53d8\u91cfzoomLevel\u540c\u6b65\u3002\u64cd\u4f5c\u53ef\u80fd\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">map<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">mapRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">;<\/span>\r\n\t<span class=\"nx\">map<\/span><span class=\"p\">.<\/span><span class=\"nf\">setZoomLevel<\/span><span class=\"p\">(<\/span><span class=\"nx\">zoomLevel<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">zoomLevel<\/span><span class=\"p\">]);<\/span>\r\n<\/code><\/pre>\n<p>\u6b64\u7279\u6548\u7121\u9700\u9032\u884c\u6e05\u7406\u3002\u5728\u958b\u767c\u74b0\u5883\u4e2d\uff0cReact\u6703\u57f7\u884c\u5169\u6b21\u7279\u6548\u3002\u7136\u800c\uff0c\u5373\u4f7f\u5c07setZoomLevel\u4ee5\u76f8\u540c\u6578\u503c\u547c\u53eb\u5169\u6b21\uff0c\u4e5f\u4e0d\u6703\u767c\u751f\u4efb\u4f55\u7279\u5225\u7684\u4e8b\u60c5\u3002\u5118\u7ba1\u53ef\u80fd\u6703\u589e\u52a0\u4e00\u4e9b\u8ca0\u8f09\uff0c\u4f46\u5728\u6b63\u5f0f\u74b0\u5883\u4e2d\uff0c\u4e0d\u6703\u6709\u4e0d\u5fc5\u8981\u7684\u91cd\u65b0\u639b\u8f09\uff0c\u6240\u4ee5\u9019\u4e0d\u662f\u554f\u984c\u3002<\/p>\n<p>\u6709\u4e9bAPI\u53ef\u80fd\u4e0d\u5141\u8bb8\u8fde\u7eed\u8c03\u7528\u4e24\u6b21\u3002\u4f8b\u5982\uff0c\u5185\u7f6e\u7684<dialog><\/dialog>\u5143\u7d20\u7684showModal\u65b9\u6cd5\uff0c\u5982\u679c\u8c03\u7528\u65f6\u5bf9\u8bdd\u6846\u5df2\u7ecf\u6253\u5f00\uff0c\u5219\u4f1a\u629b\u51fa\u5f02\u5e38\u3002\u9700\u8981\u5b9e\u73b0\u4e00\u4e2a\u6e05\u7406\u51fd\u6570\uff0c\u5fc5\u987b\u5173\u95ed\u5bf9\u8bdd\u6846\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">dialog<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">dialogRef<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">;<\/span>\r\n\t<span class=\"nx\">dialog<\/span><span class=\"p\">.<\/span><span class=\"nf\">showModal<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">dialog<\/span><span class=\"p\">.<\/span><span class=\"nf\">close<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u9996\u5148\u8c03\u7528showModal()\u51fd\u6570\uff0c\u7136\u540e\u7acb\u5373\u4f7f\u7528close()\u51fd\u6570\u5173\u95ed\uff0c\u63a5\u7740\u518d\u6b21\u8c03\u7528showModal()\u51fd\u6570\u3002\u7528\u6237\u6765\u770b\uff0c\u8fd9\u4e2a\u884c\u4e3a\u548c\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u53ea\u8c03\u7528\u4e00\u6b21showModal()\u51fd\u6570\u6ca1\u6709\u533a\u522b\u3002<\/p>\n<h2>\u68c0\u6d4b\u4e8b\u4ef6<\/h2>\n<p>\u5728\u4f7f\u7528\u7279\u6548\u65f6\uff0c\u82e5\u5c06\u5176\u6ce8\u518c\u7ed9\u4e8b\u4ef6\u7b49\u8fdb\u884c\u68c0\u6d4b\u7684\u76d1\u542c\u5668\uff0c\u8bf7\u5728\u6e05\u7406\u51fd\u6570\u4e2d\u5220\u9664\u6ce8\u518c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">function<\/span> <span class=\"nf\">handleScroll<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nx\">scrollX<\/span><span class=\"p\">,<\/span> <span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nx\">scrollY<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"p\">}<\/span>\r\n\t<span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nf\">addEventListener<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">scroll<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handleScroll<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nb\">window<\/span><span class=\"p\">.<\/span><span class=\"nf\">removeEventListener<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">scroll<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"nx\">handleScroll<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u8fd9\u4e2a\u6548\u679c\u5728\u8c03\u7528addEventListener()\u540e\u7acb\u5373\u4f7f\u7528removeEventListener()\u8fdb\u884c\u5220\u9664\uff0c\u7136\u540e\u518d\u6b21\u5728\u76f8\u540c\u7684\u5904\u7406\u5668\u4e0a\u6267\u884caddEventListener()\u3002\u7ed3\u679c\u662f\uff0c\u53ea\u6709\u4e00\u4e2a\u6709\u6548\u7684\u76d1\u542c\u5668\u3002\u5bf9\u4e8e\u7528\u6237\u6765\u8bf4\uff0c\u4e0e\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u53ea\u8c03\u7528\u4e00\u6b21addEventListener()\u76f8\u540c\u3002<\/p>\n<h2>\u5f00\u59cb\u52a8\u753b<\/h2>\n<p>\u4e00\u65e6\u7279\u6548\u6267\u884c\u52a8\u753b\u540e\uff0c\u6e05\u7406\u51fd\u6570\u5fc5\u987b\u5c06\u5176\u6062\u590d\u5230\u521d\u59cb\u503c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">node<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ref<\/span><span class=\"p\">.<\/span><span class=\"nx\">current<\/span><span class=\"p\">;<\/span>\r\n\t<span class=\"nx\">node<\/span><span class=\"p\">.<\/span><span class=\"nx\">style<\/span><span class=\"p\">.<\/span><span class=\"nx\">opacity<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u30a2\u30cb\u30e1\u30fc\u30b7\u30e7\u30f3\u306e\u958b\u59cb<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">node<\/span><span class=\"p\">.<\/span><span class=\"nx\">style<\/span><span class=\"p\">.<\/span><span class=\"nx\">opacity<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u521d\u671f\u5024\u306b\u623b\u3059<\/span>\r\n\t<span class=\"p\">};<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u8bbe\u7f6e\u6548\u679c\u7684\u4e0d\u900f\u660e\u5ea6\u503c1\u5c06\u5728\u6e05\u7406\u64cd\u4f5c\u4e2d\u88ab\u91cd\u7f6e\u4e3a0\uff0c\u5e76\u91cd\u65b0\u8bbe\u7f6e\u4e3a1\u3002\u4ece\u7528\u6237\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5728\u751f\u4ea7\u73af\u5883\u4e2d\u76f4\u63a5\u8bbe\u5b9a\u503c1\u7684\u884c\u4e3a\u4e0e\u4e4b\u524d\u5e76\u65e0\u5dee\u522b\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5982\u679c\u4f7f\u7528\u7684\u52a8\u753b\u7b2c\u4e09\u65b9\u5e93\u652f\u6301\u7f13\u52a8\u52a8\u753b\uff0c\u6e05\u7406\u51fd\u6570\u8fd8\u9700\u8981\u5c06\u65f6\u95f4\u8f74\u6062\u590d\u5230\u521d\u59cb\u72b6\u6001\u3002<\/p>\n<h2>\u83b7\u53d6\u6570\u636e<\/h2>\n<p>\u5728\u5f00\u59cb\u4f7f\u7528\u6548\u679c\u6536\u96c6\u5916\u90e8\u6570\u636e\u65f6\uff0c\u5fc5\u987b\u8981\u6c42\u6e05\u7406\u51fd\u6570\u7ec8\u6b62\u8ba1\u7b97\u6216\u5ffd\u7565\u7ed3\u679c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">let<\/span> <span class=\"nx\">ignore<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">false<\/span><span class=\"p\">;<\/span>\r\n\t<span class=\"k\">async<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">startFetching<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">json<\/span> <span class=\"o\">=<\/span> <span class=\"k\">await<\/span> <span class=\"nf\">fetchTodos<\/span><span class=\"p\">(<\/span><span class=\"nx\">userId<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">ignore<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nf\">setTodos<\/span><span class=\"p\">(<\/span><span class=\"nx\">json<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"p\">}<\/span>\r\n\t<span class=\"p\">}<\/span>\r\n\t<span class=\"nf\">startFetching<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"nx\">ignore<\/span> <span class=\"o\">=<\/span> <span class=\"kc\">true<\/span><span class=\"p\">;<\/span>\r\n\t<span class=\"p\">};<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">userId<\/span><span class=\"p\">]);<\/span>\r\n<\/code><\/pre>\n<p>\u5df2\u7ecf\u53d1\u9001\u8fc7\u7684\u8bf7\u6c42\u65e0\u6cd5\u53d8\u66f4\u4e3a&#8221;\u65e0&#8221;\u3002\u56e0\u6b64\uff0c\u6e05\u7406\u51fd\u6570\u5fc5\u987b\u786e\u4fdd\u5df2\u4e0d\u9700\u8981\u7684\u83b7\u53d6\u4e0d\u4f1a\u518d\u5bf9\u5e94\u7528\u4ea7\u751f\u5f71\u54cd\u3002\u4f8b\u5982\uff0c\u5f53userId\u4ece&#8217;Alice&#8217;\u53d8\u4e3a&#8217;Bob&#8217;\u65f6\uff0c\u6e05\u7406\u51fd\u6570\u5e94\u8be5\u5ffd\u7565&#8217;Alice&#8217;\u7684\u54cd\u5e94\uff0c\u5373\u4f7f\u5b83\u5728&#8217;Bob&#8217;\u4e4b\u540e\u63a5\u6536\u5230\u3002<\/p>\n<p>\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u5f00\u53d1\u8005\u5de5\u5177\u4e2d\u7684[\u7f51\u7edc]\u9009\u9879\u5361\u786e\u8ba4\u4e24\u4e2a\u8bf7\u6c42\u3002\u6240\u4ee5\u6ca1\u6709\u95ee\u9898\u3002\u901a\u8fc7\u4ee5\u4e0a\u6240\u793a\u7684\u4ee3\u7801\u793a\u4f8b\u7684\u5904\u7406\uff0c\u9996\u4e2a\u6548\u679c\u5c06\u7acb\u5373\u88ab\u6e05\u9664\uff0c\u53d8\u91cfignore\u5c06\u88ab\u8bbe\u5b9a\u4e3atrue\u3002\u56e0\u6b64\uff0c\u53ef\u4ee5\u907f\u514d\u5728\u6761\u4ef6\u5224\u65adif (!ignore)\u4e2d\u5bf9\u72b6\u6001\u9020\u6210\u5f71\u54cd\u3002\u7ed3\u679c\u662f\u540e\u7eed\u7684\u8bf7\u6c42\u5c06\u751f\u6548\u3002<\/p>\n<p>\u5728\u6b63\u5f0f\u73af\u5883\u4e2d\uff0c\u8bf7\u6c42\u53ea\u4f1a\u53d1\u751f\u4e00\u6b21\u3002\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u5173\u6ce8\u7b2c\u4e8c\u6b21\u8bf7\u6c42\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6700\u9002\u5408\u7684\u65b9\u6cd5\u662f\u786e\u4fdd\u8bf7\u6c42\u4e0d\u91cd\u590d\uff0c\u5e76\u4f7f\u7528\u7ec4\u4ef6\u4e4b\u95f4\u7684\u7f13\u5b58\u6765\u5904\u7406\u54cd\u5e94\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">TodoList<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"nx\">todos<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useSomeDataLibrary<\/span><span class=\"p\">(<\/span><span class=\"s2\">`\/api\/user\/<\/span><span class=\"p\">${<\/span><span class=\"nx\">userId<\/span><span class=\"p\">}<\/span><span class=\"s2\">\/todos`<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"c1\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u4e0d\u4ec5\u5f00\u53d1\u4f53\u9a8c\u4f1a\u63d0\u9ad8\uff0c\u800c\u4e14\u5e94\u7528\u7a0b\u5e8f\u4e5f\u53ef\u4ee5\u52a0\u5feb\u901f\u5ea6\u3002\u4f8b\u5982\uff0c\u5373\u4f7f\u7528\u6237\u6309\u4e0b\u8fd4\u56de\u6309\u94ae\uff0c\u4e5f\u4e0d\u9700\u8981\u7b49\u5f85\u52a0\u8f7d\u3002\u56e0\u4e3a\u6570\u636e\u88ab\u7f13\u5b58\u4e86\uff0c\u6240\u4ee5\u4e0d\u9700\u8981\u91cd\u65b0\u52a0\u8f7d\u3002\u8fd9\u6837\u7684\u7f13\u5b58\u53ef\u4ee5\u81ea\u5df1\u6784\u5efa\u3002\u6216\u8005\uff0c\u53ef\u4ee5\u9009\u62e9\u5404\u79cd\u5e93\u6765\u66ff\u4ee3\u624b\u52a8\u63d0\u53d6\u6548\u679c\u3002<\/p>\n<h3>\u901a\u8fc7\u9664\u4e86\u6548\u679c\u4ee5\u5916\u7684\u65b9\u5f0f\u83b7\u53d6\u6570\u636e<\/h3>\n<p>\u5728\u5b8c\u5168\u57fa\u4e8e\u5ba2\u6237\u7aef\u7684\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u4ece\u6548\u679c\u4e2d\u8c03\u7528fetch\u662f\u5e38\u89c1\u7684\u7528\u4e8e\u83b7\u53d6\u6570\u636e\u7684\u65b9\u6cd5\u3002\u7136\u800c\uff0c\u8fd9\u79cd\u65b9\u5f0f\u9700\u8981\u5927\u91cf\u624b\u52a8\u5de5\u4f5c\uff0c\u5e76\u4e14\u5b58\u5728\u4ee5\u4e0b\u95ee\u9898\u3002<\/p>\n<p>\u5728\u670d\u52a1\u5668\u4e0a\u4e0d\u4f1a\u8fd0\u884c\u6548\u679c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u7ecf\u8fc7\u670d\u52a1\u5668\u6e32\u67d3\u7684\u521d\u59cbHTML\u4e2d\u6ca1\u6709\u6570\u636e\uff0c\u53ea\u663e\u793a\u52a0\u8f7d\u4e2d\u7684\u72b6\u6001\u3002\u5ba2\u6237\u7aef\u7684\u8ba1\u7b97\u673a\u9700\u8981\u4e0b\u8f7d\u6240\u6709JavaScript\u6587\u4ef6\u3002\u7136\u540e\u624d\u80fd\u6e32\u67d3\u5e94\u7528\u7a0b\u5e8f\uff0c\u5e76\u6700\u7ec8\u4e86\u89e3\u9700\u8981\u52a0\u8f7d\u7684\u6570\u636e\u3002\u8fd9\u53ef\u4ee5\u8bf4\u662f\u6548\u7387\u4f4e\u4e0b\u3002<\/p>\n<p>\u5982\u679c\u76f4\u63a5\u4ece\u6548\u679c\u4e2d\u53d6\u5f97\u6570\u636e\uff0c\u53ef\u80fd\u4f1a\u51fa\u73b0\u201c\u7f51\u7edc\u7011\u5e03\u201d\u7684\u60c5\u51b5\u3002\u5047\u8bbe\u6e32\u67d3\u4e86\u7236\u7ec4\u4ef6\u5e76\u83b7\u53d6\u4e86\u6570\u636e\uff0c\u63a5\u4e0b\u6765\u5f53\u6e32\u67d3\u5b50\u7ec4\u4ef6\u65f6\uff0c\u53ef\u80fd\u4f1a\u5f00\u59cb\u83b7\u53d6\u90a3\u4e9b\u6570\u636e\u3002\u5982\u679c\u7f51\u7edc\u4e0d\u591f\u5feb\uff0c\u901f\u5ea6\u4f1a\u5927\u5e45\u964d\u4f4e\uff0c\u76f8\u6bd4\u540c\u65f6\u83b7\u53d6\u6240\u6709\u6570\u636e\u3002<\/p>\n<p>\u76f4\u63a5\u4f7f\u7528\u6548\u679c\u8fdb\u884c\u6570\u636e\u63d0\u53d6\u7684\u8bdd\uff0c\u901a\u5e38\u4e0d\u4f1a\u8fdb\u884c\u6570\u636e\u9884\u52a0\u8f7d\u548c\u7f13\u5b58\u3002\u4f8b\u5982\uff0c\u5f53\u7ec4\u4ef6\u88ab\u5378\u8f7d\u540e\u91cd\u65b0\u6302\u8f7d\u65f6\uff0c\u9700\u8981\u91cd\u65b0\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<p>\u7f16\u5199\u4ee3\u7801\u5e76\u4e0d\u5bb9\u6613\u3002\u5982\u679c\u6ca1\u6709\u76f8\u5f53\u6570\u91cf\u7684\u6837\u677f\u4ee3\u7801\uff0c\u5c31\u4e0d\u53ef\u80fd\u7f16\u5199\u51fa\u4e0d\u4f1a\u4ea7\u751f\u7c7b\u4f3c\u7ade\u4e89\u72b6\u6001\u9519\u8bef\u7684fetch\u8c03\u7528\u3002<\/p>\n<p>\u8fd9\u4e9b\u95ee\u9898\u4e0d\u4ec5\u9650\u4e8eReact\u3002\u5982\u679c\u8981\u5728\u6302\u8f7d\u65f6\u83b7\u53d6\u6570\u636e\uff0c\u8fd9\u9002\u7528\u4e8e\u4efb\u4f55\u5e93\u3002\u4e0e\u8def\u7531\u4e00\u6837\uff0c\u6b63\u786e\u5b9e\u73b0\u6570\u636e\u83b7\u53d6\u5e76\u4e0d\u5bb9\u6613\u3002\u6211\u5efa\u8bae\u4ee5\u4e0b\u4e24\u79cd\u65b9\u5f0f\uff1a<\/p>\n<ul class=\"post-ul\">\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u4f7f\u3046\u5834\u5408: \u7d44\u307f\u8fbc\u307f\u306e\u30c7\u30fc\u30bf\u30d5\u30a7\u30c3\u30c1\u306e\u6a5f\u80fd\u3092\u7528\u3044\u3066\u304f\u3060\u3055\u3044\u3002\u30e2\u30c0\u30f3\u306aReact\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306b\u306f\u3001\u30c7\u30fc\u30bf\u30d5\u30a7\u30c3\u30c1\u306e\u4ed5\u7d44\u307f\u304c\u7d71\u5408\u3055\u308c\u3066\u3044\u307e\u3059\u3002\u52b9\u7387\u7684\u304b\u3064\u4e0a\u8ff0\u306e\u3088\u3046\u306a\u554f\u984c\u3082\u3042\u308a\u307e\u305b\u3093\u3002<br \/>\n\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u3092\u4f7f\u308f\u306a\u3044\u5834\u5408: \u30af\u30e9\u30a4\u30a2\u30f3\u30c8\u30b5\u30a4\u30c9\u30ad\u30e3\u30c3\u30b7\u30e5\u306e\u5229\u7528\u307e\u305f\u306f\u69cb\u7bc9\u3092\u304a\u8003\u3048\u304f\u3060\u3055\u3044\u3002\u3088\u304f\u7528\u3044\u3089\u308c\u308b\u30aa\u30fc\u30d7\u30f3\u30bd\u30fc\u30b9\u306e\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3068\u3057\u3066\u306f\u3001React Query\u3084useSWR\u3001\u304a\u3088\u3073React Router 6.4+\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002\u30bd\u30ea\u30e5\u30fc\u30b7\u30e7\u30f3\u3092\u81ea\u524d\u3067\u69cb\u7bc9\u3057\u3066\u3082\u3088\u3044\u3067\u3057\u3087\u3046\u3002\u305d\u306e\u5834\u5408\u3001\u5185\u90e8\u7684\u306b\u30a8\u30d5\u30a7\u30af\u30c8\u306f\u4f7f\u3044\u3064\u3064\u3001\u3064\u304e\u306e\u3088\u3046\u306a\u30ed\u30b8\u30c3\u30af\u3092\u52a0\u3048\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p>\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u91cd\u8907\u6392\u9664\u3002<br \/>\n\u30ec\u30b9\u30dd\u30f3\u30b9\u306e\u30ad\u30e3\u30c3\u30b7\u30e5\u3002<br \/>\n\u30cd\u30c3\u30c8\u30ef\u30fc\u30af\u306e\u30a6\u30a9\u30fc\u30bf\u30fc\u30d5\u30a9\u30fc\u30eb\u56de\u907f\u3002<\/p>\n<p>\u30c7\u30fc\u30bf\u306e\u30d7\u30ea\u30ed\u30fc\u30c9\u3084\u30eb\u30fc\u30c6\u30a3\u30f3\u30b0\u3078\u306e\u30c7\u30fc\u30bf\u8981\u6c42\u306e\u5f15\u304d\u4e0a\u3052\u3002<\/ul>\n<p>\u5982\u679c\u8fd9\u4e9b\u65b9\u6cd5\u90fd\u4e0d\u7b26\u5408\u76ee\u6807\u7684\u8bdd\uff0c\u6211\u4eec\u53ef\u4ee5\u5728\u6548\u679c\u5185\u76f4\u63a5\u83b7\u53d6\u6570\u636e\u3002<\/p>\n<h2>\u5c06\u5206\u6790\u65e5\u5fd7\u53d1\u9001<\/h2>\n<p>\u5047\u8bbe\u4ee5\u4e0b\u4ee3\u7801\u5728\u8bbf\u95ee\u7f51\u9875\u65f6\u53d1\u9001\u5206\u6790\u4e8b\u4ef6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"nf\">logVisit<\/span><span class=\"p\">(<\/span><span class=\"nx\">url<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ POST\u30ea\u30af\u30a8\u30b9\u30c8\u306e\u9001\u4fe1<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">url<\/span><span class=\"p\">]);<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u6bcf\u4e2aURL\u5bf9\u5e94\u7684logVisit\u90fd\u4f1a\u88ab\u8c03\u7528\u4e24\u6b21\u3002\u4f60\u53ef\u80fd\u60f3\u8981\u4fee\u590d\u8fd9\u4e2a\u95ee\u9898\u3002\u8ba9\u6211\u4eec\u4fdd\u6301\u8fd9\u6bb5\u4ee3\u7801\u4e0d\u53d8\u3002\u5c31\u50cf\u4e4b\u524d\u7684\u4ee3\u7801\u793a\u4f8b\u4e00\u6837\uff0c\u4ece\u7528\u6237\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u6267\u884c\u4e00\u6b21\u6216\u8005\u4e24\u6b21\u90fd\u4e0d\u4f1a\u6539\u53d8\u884c\u4e3a\u3002\u4ece\u5b9e\u8df5\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u5728\u5f00\u53d1\u65f6logVisit\u53ef\u80fd\u4ec0\u4e48\u90fd\u4e0d\u4f1a\u505a\u3002\u56e0\u4e3a\u4e0d\u5e0c\u671b\u5f00\u53d1\u673a\u5668\u7684\u65e5\u5fd7\u5f71\u54cd\u5230\u751f\u4ea7\u73af\u5883\u7684\u6d4b\u91cf\u7ed3\u679c\u3002\u800c\u4e14\uff0c\u7ec4\u4ef6\u4f1a\u5728\u6bcf\u6b21\u4fdd\u5b58\u6587\u4ef6\u65f6\u91cd\u65b0\u52a0\u8f7d\u3002\u65e0\u8bba\u5982\u4f55\uff0c\u5728\u5f00\u53d1\u65f6\u90fd\u4f1a\u8bb0\u5f55\u989d\u5916\u7684\u8bbf\u95ee\u8bb0\u5f55\u3002<\/p>\n<p>\u5728\u751f\u4ea7\u73af\u5883\u4e2d\uff0c\u4e0d\u4f1a\u51fa\u73b0\u91cd\u590d\u7684\u8bbf\u95ee\u65e5\u5fd7\u3002<\/p>\n<p>\u8c03\u8bd5\u6b63\u5728\u53d1\u9001\u7684\u5206\u6790\u4e8b\u4ef6\u6709\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\u3002<\/p>\n<ul class=\"post-ul\">\n\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3092\u30b9\u30c6\u30fc\u30b8\u30f3\u30b0\u74b0\u5883\u306b\u30c7\u30d7\u30ed\u30a4\u3059\u308b\u3002\u672c\u756a\u30e2\u30fc\u30c9\u3067\u306e\u5b9f\u884c\u3002<\/p>\n<p>\u4e00\u6642\u7684\u306bStrictMode\u3092\u5916\u3057\u3066\u3001\u958b\u767a\u74b0\u5883\u5c02\u7528\u306e\u518d\u30de\u30a6\u30f3\u30c8\u30c1\u30a7\u30c3\u30af\u3092\u6b62\u3081\u308b\u3002<br \/>\n\u30a2\u30ca\u30ea\u30c6\u30a3\u30af\u30b9\u30ed\u30b0\u3092\u3001\u30a8\u30d5\u30a7\u30af\u30c8\u3067\u306a\u304f\u3001\u30eb\u30fc\u30c8\u5909\u66f4\u306e\u30a4\u30d9\u30f3\u30c8\u30cf\u30f3\u30c9\u30e9\u304b\u3089\u9001\u308b\u3002<\/p>\n<p>\u4ea4\u5dee\u30aa\u30d6\u30b6\u30fc\u30d0\u30fc\u3092\u7528\u3044\u3066\u3088\u308a\u6b63\u78ba\u306b\u5206\u6790\u3059\u308b\u3002<\/p>\n<p>\u3069\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u304c\u30d3\u30e5\u30fc\u30dd\u30fc\u30c8\u306b\u3042\u308a\u3001\u3069\u308c\u3060\u3051\u306e\u6642\u9593\u8868\u793a\u3055\u308c\u3066\u3044\u308b\u304b\u8ffd\u8de1\u3067\u304d\u308b\u3002<\/ul>\n<h2>\u5982\u679c\u4e0d\u662f\u7279\u6548\u7684\u60c5\u51b5\u4e0b\uff1a\u5e94\u7528\u7a0b\u5e8f\u521d\u59cb\u5316\u3002<\/h2>\n<p>\u5f53\u5e94\u7528\u7a0b\u5e8f\u542f\u52a8\u65f6\uff0c\u53ef\u80fd\u8fd8\u6709\u4e00\u4e9b\u53ea\u9700\u8981\u6267\u884c\u4e00\u6b21\u7684\u903b\u8f91\u3002\u8bf7\u5c06\u8fd9\u4e9b\u4ee3\u7801\u653e\u5728\u7ec4\u4ef6\u5916\u90e8\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u30d6\u30e9\u30a6\u30b6\u3067\u5b9f\u884c\u3055\u308c\u3066\u3044\u308b\u304b\u3092\u78ba\u304b\u3081\u308b<\/span>\r\n<span class=\"k\">if <\/span><span class=\"p\">(<\/span><span class=\"k\">typeof<\/span> <span class=\"nb\">window<\/span> <span class=\"o\">!==<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">undefined<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"nf\">checkAuthToken<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"nf\">loadDataFromLocalStorage<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ ...<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u5982\u679c\u4e0d\u662f\u7279\u6548\u7684\u60c5\u51b5\u4e0b\uff1a\u8d2d\u4e70\u5546\u54c1\u3002<\/h2>\n<p>\u5373\u4f7f\u7f16\u5199\u4e86\u6e05\u7406\u51fd\u6570\uff0c\u5bf9\u4e8e\u7528\u6237\u800c\u8a00\uff0c\u65e0\u6cd5\u9632\u6b62\u4e8c\u6b21\u6267\u884c\u6548\u679c\u65f6\u4ea7\u751f\u7684\u5f71\u54cd\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u4f8b\u5982\u5f53\u6548\u679c\u53d1\u9001POST\u8bf7\u6c42\uff0c\u6bd4\u5982\u8d2d\u4e70\u5546\u54c1\u65f6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ ? NG: \u30a8\u30d5\u30a7\u30af\u30c8\u304c\u958b\u767a\u6642\u306b\u306f2\u5ea6\u5b9f\u884c\u3055\u308c\u3001\u30b3\u30fc\u30c9\u306b\u554f\u984c\u304c\u751f\u3058\u308b<\/span>\r\n\t<span class=\"nf\">fetch<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\/api\/buy<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">method<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">POST<\/span><span class=\"dl\">'<\/span> <span class=\"p\">});<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"p\">[]);<\/span>\r\n<\/code><\/pre>\n<p>\u6211\u4e0d\u60f3\u8d2d\u4e70\u76f8\u540c\u7684\u5546\u54c1\u4e24\u6b21\u3002\u56e0\u6b64\uff0c\u8fd9\u4e2a\u903b\u8f91\u4e0d\u80fd\u52a0\u5165\u5230\u6548\u679c\u4e2d\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c\u7528\u6237\u5207\u6362\u5230\u5176\u4ed6\u9875\u9762\u540e\u518d\u6309\u8fd4\u56de\u6309\u94ae\uff0c\u6548\u679c\u4f1a\u88ab\u91cd\u65b0\u6267\u884c\u3002\u7528\u6237\u8d2d\u4e70\u4ea7\u54c1\u7684\u65f6\u673a\u5e76\u4e0d\u662f\u5728\u8bbf\u95ee\u9875\u9762\u65f6\uff0c\u800c\u662f\u5728\u70b9\u51fb\u8d2d\u4e70\u6309\u94ae\u65f6\u3002<\/p>\n<p>\u8d2d\u4e70\u4e0d\u662f\u7531\u6e32\u67d3\u5f15\u8d77\u7684\uff0c\u800c\u662f\u57fa\u4e8e\u7279\u5b9a\u7528\u6237\u64cd\u4f5c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u53ea\u6709\u7528\u6237\u6309\u4e0b\u6309\u94ae\u65f6\u624d\u6267\u884c\u8d2d\u4e70\u3002\u8bf7\u5c06\/api\/buy\u8bf7\u6c42\u4ece\u6548\u679c\u4e2d\u6392\u9664\uff0c\u79fb\u81f3\u8d2d\u4e70\u6309\u94ae\u7684\u4e8b\u4ef6\u5904\u7406\u7a0b\u5e8f\u4e2d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">handleClick<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"c1\">\/\/ \u2705 OK: \u8cfc\u5165\u306f\u7279\u5b9a\u306e\u30e6\u30fc\u30b6\u30fc\u64cd\u4f5c\u306b\u3082\u3068\u3065\u304f\u306e\u3067\u30a4\u30d9\u30f3\u30c8<\/span>\r\n\t<span class=\"nf\">fetch<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\/api\/buy<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">method<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">POST<\/span><span class=\"dl\">'<\/span> <span class=\"p\">});<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6362\u8a00\u4e4b\uff0c\u5982\u679c\u91cd\u65b0\u52a0\u8f7d\u65f6\u903b\u8f91\u51fa\u73b0\u9519\u8bef\uff0c\u90a3\u4e48\u901a\u5e38\u60c5\u51b5\u4e0b\u4f1a\u663e\u9732\u51fa\u5b58\u5728bug\u7684\u95ee\u9898\u3002\u4ece\u7528\u6237\u7684\u89d2\u5ea6\u6765\u770b\uff0c\u8fd9\u4e24\u79cd\u60c5\u51b5\u4e0d\u5e94\u8be5\u6709\u660e\u663e\u7684\u5dee\u522b\u3002<\/p>\n<ul class=\"post-ul\">\n\u30da\u30fc\u30b8\u3092\u8a2a\u308c\u308b\u3053\u3068\u3002<br \/>\n\u8a2a\u308c\u305f\u30da\u30fc\u30b8\u3067\u30ea\u30f3\u30af\u3092\u30af\u30ea\u30c3\u30af\u3057\u3001\u79fb\u3063\u305f\u5225\u306e\u30da\u30fc\u30b8\u304b\u3089\u623b\u308b\u30dc\u30bf\u30f3\u3092\u62bc\u3059\u3053\u3068\u3002<\/ul>\n<p>\u5728\u5f00\u53d1\u8fc7\u7a0b\u4e2d\uff0cReact\u4f1a\u91cd\u65b0\u88c5\u8f7d\u7ec4\u4ef6\uff0c\u4ee5\u786e\u4fdd\u5176\u9075\u5faa\u6b64\u539f\u5219\u3002<\/p>\n<h1>\u901a\u8fc7\u611f\u89c9\u6765\u786e\u8ba4\u7279\u6548\u7684\u5b9e\u9645\u8fd0\u4f5c\u3002<\/h1>\n<p>\u8ba9\u6211\u4eec\u901a\u8fc7\u611f\u89c9\u6765\u786e\u8ba4\u4e00\u4e0b\u6548\u679c\u662f\u5982\u4f55\u5b9e\u9645\u5de5\u4f5c\u7684\u3002<\/p>\n<p>\u5728\u4e0b\u9762\u7684\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u5f53\u70b9\u51fb[Mount the component]\u6309\u94ae\u65f6\uff0c\u6587\u672c\u8f93\u5165\u5b57\u6bb5\u5c06\u51fa\u73b0\u3002\u8bbe\u7f6e\u6548\u679c\u7684\u662fsetTimeout\u51fd\u6570\uff0c\u5b83\u5c06\u57283\u79d2\u540e\u5c06\u8f93\u5165\u5b57\u6bb5\u4e2d\u7684\u6587\u672c(text)\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002\u6e05\u7406\u51fd\u6570\u5c06\u53d6\u6d88\u7b49\u5f85\u4e2d\u7684\u8d85\u65f6\u64cd\u4f5c(clearTimeout)\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">Playground<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">text<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setText<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">a<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">onTimeout<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\u23f0 <\/span><span class=\"dl\">'<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">text<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"p\">};<\/span>\r\n\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">? Schedule \"<\/span><span class=\"dl\">'<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">text<\/span> <span class=\"o\">+<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\" log<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">timeoutId<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">setTimeout<\/span><span class=\"p\">(<\/span><span class=\"nx\">onTimeout<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3000<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t\t<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">? Cancel \"<\/span><span class=\"dl\">'<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">text<\/span> <span class=\"o\">+<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\" log<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t\t\t<span class=\"nf\">clearTimeout<\/span><span class=\"p\">(<\/span><span class=\"nx\">timeoutId<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"p\">};<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">text<\/span><span class=\"p\">]);<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u9996\u5148\u663e\u793a\u7684\u662f\u4e09\u4e2a\u8f93\u51fa\u3002 &#8221; Schedule &#8220;\u548c &#8221; Cancel &#8220;\u989d\u5916\u51fa\u73b0\u7684\u539f\u56e0\u662f\uff0cReact\u5728\u5f00\u53d1\u65f6\u91cd\u65b0\u52a0\u8f7d\u7ec4\u4ef6\u4e00\u6b21\u3002\u901a\u8fc7\u786e\u4fdd\u6e05\u7406\u6b63\u786e\u5b9e\u65bd\uff0c\u53ef\u4ee5\u786e\u4fdd\u8fd9\u4e00\u70b9\u3002<\/p>\n<blockquote><p>?\u5b89\u6392&#8221;A&#8221;\u8bb0\u5f55<br \/>\n?\u53d6\u6d88&#8221;A&#8221;\u8bb0\u5f55<br \/>\n?\u5b89\u6392&#8221;A&#8221;\u8bb0\u5f55<\/p><\/blockquote>\n<p>\u7136\u540e\uff0c3\u79d2\u540e\u663e\u793a\u7684\u662f\u8d85\u65f6\u7ed3\u675f\u7684\u4e0b\u4e00\u4e2a\u8f93\u51fa\u3002<\/p>\n<blockquote><p>\u23f0 \u4e00\u4e2a<\/p><\/blockquote>\n<p>\u8bf7\u5728\u8f93\u5165\u5b57\u6bb5\u4e2d\u8fc5\u901f\u6dfb\u52a0\u6587\u672c&#8221;bc&#8221;\u3002\u4e00\u65e6&#8221;ab&#8221;\u88ab&#8221;Schedule&#8221;\u540e\u7acb\u5373\u88ab&#8221;Cancel&#8221;\uff0c&#8221;abc&#8221;\u7684&#8221;Schedule&#8221;\u5c06\u4f1a\u91cd\u65b0\u8bbe\u7f6e\u3002React\u5728\u6267\u884c\u4e0b\u4e00\u4e2a\u6e32\u67d3\u6548\u679c\u4e4b\u524d\u8fdb\u884c\u6e05\u7406\u7684\u662f\u4e0a\u4e00\u6b21\u6e32\u67d3\u7684\u6548\u679c\u3002\u56e0\u6b64\uff0c\u5728\u4ee5\u4e0a\u4ee3\u7801\u793a\u4f8b\u4e2d\uff0c\u5373\u4f7f\u5feb\u901f\u8f93\u5165\u6587\u672c\u5b57\u6bb5\uff0c\u6700\u591a\u53ea\u80fd\u540c\u65f6\u8bbe\u7f6e\u4e00\u4e2a\u8d85\u65f6\u3002<\/p>\n<blockquote><p>? \u5b89\u6392&#8221;ab&#8221;\u65e5\u5fd7<br \/>\n? \u53d6\u6d88&#8221;ab&#8221;\u65e5\u5fd7<br \/>\n? \u5b89\u6392&#8221;abc&#8221;\u65e5\u5fd7<br \/>\n\u23f0 abc<\/p><\/blockquote>\n<p>\u5f53\u60a8\u5728\u8f93\u5165\u6846\u4e2d\u952e\u5165\u4efb\u4f55\u6587\u672c\u65f6\uff0c\u8bf7\u7acb\u5373\u70b9\u51fb[\u5378\u8f7d\u7ec4\u4ef6]\u6309\u94ae\u3002\u901a\u8fc7\u5378\u8f7d\u7ec4\u4ef6\uff0c\u6700\u540e\u7684\u6e32\u67d3\u6548\u679c\u5c06\u88ab\u6e05\u9664\u3002\u5982\u679c\u5728\u8d85\u65f6\u7ed3\u675f\u524d\u53d6\u6d88\u5378\u8f7d\uff0c\u5c06\u4e0d\u4f1a\u8f93\u51fa\u5230\u63a7\u5236\u53f0\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">show<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setShow<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"kc\">false<\/span><span class=\"p\">);<\/span>\r\n\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"p\">&lt;&gt;<\/span>\r\n\t\t\t<span class=\"p\">&lt;<\/span><span class=\"nt\">button<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">setShow<\/span><span class=\"p\">(<\/span><span class=\"o\">!<\/span><span class=\"nx\">show<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>\r\n\t\t\t\t<span class=\"si\">{<\/span><span class=\"nx\">show<\/span> <span class=\"p\">?<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Unmount<\/span><span class=\"dl\">'<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Mount<\/span><span class=\"dl\">'<\/span><span class=\"si\">}<\/span> the component\r\n\t\t\t<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\r\n\t\t\t<span class=\"si\">{<\/span><span class=\"nx\">show<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">hr<\/span> <span class=\"p\">\/&gt;<\/span><span class=\"si\">}<\/span>\r\n\t\t\t<span class=\"si\">{<\/span><span class=\"nx\">show<\/span> <span class=\"o\">&amp;&amp;<\/span> <span class=\"p\">&lt;<\/span><span class=\"nc\">Playground<\/span> <span class=\"p\">\/&gt;<\/span><span class=\"si\">}<\/span>\r\n\t\t<span class=\"p\">&lt;\/&gt;<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u6700\u540e\u6211\u4eec\u6765\u786e\u8ba4\u4e00\u4e0b\u5982\u679c\u5220\u9664\u6e05\u9664\u51fd\u6570\u7684\u60c5\u51b5\u3002\u8bf7\u50cf[2]\u4e00\u6837\u5728\u6587\u672c\u6846\u4e2d\u5feb\u901f\u8f93\u5165\u201cbc\u201d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">Playground<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\r\n\t\t<span class=\"cm\">\/* return () =&gt; {\r\n\t\t\tconsole.log('? Cancel \"' + text + '\" log');\r\n\t\t\tclearTimeout(timeoutId);\r\n\t\t}; *\/<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">text<\/span><span class=\"p\">]);<\/span>\r\n\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u63a7\u5236\u53f0\u7684\u663e\u793a\u4f1a\u662f\u600e\u6837\u7684\u5462\uff1f\u5f53\u7136\uff0c\u5e76\u4e0d\u4f1a\u8fdb\u884c\u6e05\u7406\u3002\u8f93\u51fa\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<blockquote><p>? \u5b89\u6392 &#8220;ab&#8221; \u65e5\u5fd7<br \/>\n? \u5b89\u6392 &#8220;abc&#8221; \u65e5\u5fd7<br \/>\n\u23f0 ab<br \/>\n\u23f0 abc<\/p><\/blockquote>\n<p>\u5f53\u8d85\u65f6\u7ed3\u675f\u65f6\uff0c\u4f60\u53ef\u80fd\u9884\u8ba1\u4f1a\u540c\u65f6\u8f93\u51fa\u4e24\u4e2a&#8221;\u23f0 abc&#8221;\u3002\u4f46\u662f\uff0c\u6bcf\u4e2a\u7279\u6548\u90fd\u4f1a&#8221;\u6355\u83b7&#8221;\u5bf9\u5e94\u6e32\u67d3\u7684\u6587\u672c\u503c\u3002\u5373\u4f7f\u6587\u672c\u72b6\u6001\u53d1\u751f\u6539\u53d8\uff0c\u7279\u6548\u4ecd\u7136\u4f1a\u4e00\u76f4\u53c2\u8003\u6e32\u67d3\u65f6\u7684\u6587\u672c\u503c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u7279\u6548\u662f\u6839\u636e\u6e32\u67d3\u800c\u72ec\u7acb\u5b58\u5728\u7684\u3002\u5982\u679c\u60f3\u66f4\u8be6\u7ec6\u4e86\u89e3\u8fd9\u4e2a\u539f\u7406\uff0c&#8221;\u95ed\u5305&#8221;\u53ef\u80fd\u4f1a\u5bf9\u4f60\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<h3>\u6bcf\u4e2a\u6e32\u67d3\u90fd\u6709\u4e0d\u540c\u7684\u7279\u6548\u3002<\/h3>\n<p>\u8ba9\u6211\u4eec\u4ee5ChatRoom\u7ec4\u4ef6\u4e2d\u7684\u6548\u679c\u4e3a\u4f8b\u6765\u7406\u89e3useEffect\u4f5c\u4e3a\u4e0e\u6e32\u67d3\u8f93\u51fa\u201c\u76f8\u5173\u201d\u7684\u884c\u4e3a\u4e4b\u4e00\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">ChatRoom<\/span><span class=\"p\">:<\/span> <span class=\"nx\">FC<\/span><span class=\"o\">&lt;<\/span><span class=\"nx\">Props<\/span><span class=\"o\">&gt;<\/span> <span class=\"o\">=<\/span> <span class=\"p\">({<\/span> <span class=\"nx\">roomId<\/span> <span class=\"p\">})<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"nf\">useEffect<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">(<\/span><span class=\"nx\">roomId<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">disconnect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">},<\/span> <span class=\"p\">[<\/span><span class=\"nx\">roomId<\/span><span class=\"p\">]);<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Welcome to <span class=\"si\">{<\/span><span class=\"nx\">roomId<\/span><span class=\"si\">}<\/span>!<span class=\"p\">&lt;\/<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\r\n<span class=\"p\">};<\/span>\r\n<\/code><\/pre>\n<p>\u623f\u95f4\u7684\u521d\u59cb\u503c\u8bbe\u4e3a&#8217;general&#8217;\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n\t<span class=\"kd\">const<\/span> <span class=\"p\">[<\/span><span class=\"nx\">roomId<\/span><span class=\"p\">,<\/span> <span class=\"nx\">setRoomId<\/span><span class=\"p\">]<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useState<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">general<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\r\n\t<span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n\t\t<span class=\"p\">&lt;&gt;<\/span>\r\n\t\t\t<span class=\"p\">&lt;<\/span><span class=\"nc\">ChatRoom<\/span> <span class=\"na\">roomId<\/span><span class=\"p\">=<\/span><span class=\"si\">{<\/span><span class=\"nx\">roomId<\/span><span class=\"si\">}<\/span> <span class=\"p\">\/&gt;<\/span>\r\n\t\t<span class=\"p\">&lt;\/&gt;<\/span>\r\n\t<span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u6700\u521d\u7684\u6e32\u67d3<\/h4>\n<p>\u7528\u6237\u8bbf\u95eeroomId=&#8221;general&#8221;\u7684<chatroom>\u3002\u6548\u679c\u4e5f\u662f\u6e32\u67d3\u8f93\u51fa\u7684\u4e00\u90e8\u5206\u3002\u8ba9\u6211\u4eec\u6545\u610f\u5199\u51fa\u5728\u4ee3\u7801\u4e2d\u4f7f\u7528\u7684\u72b6\u6001\u53d8\u91cf\u7684\u503c\uff08\u4e0d\u662f\u53ef\u8fd0\u884c\u7684\u4ee3\u7801\uff09\u3002React\u6267\u884c\u6b64\u6548\u679c\u5e76\u8fde\u63a5\u5230\u804a\u5929\u5ba4&#8217;general&#8217;\u3002<\/chatroom><\/p>\n<pre class=\"post-pre\"><code>\t<span class=\"c1\">\/\/ \u521d\u671f\u30ec\u30f3\u30c0\u30fc\u306e\u30a8\u30d5\u30a7\u30af\u30c8(roomId = 'general')<\/span>\r\n\t<span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">general<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">disconnect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">},<\/span>\r\n\t<span class=\"c1\">\/\/ \u521d\u671f\u30ec\u30f3\u30c0\u30fc\u306e\u4f9d\u5b58(roomId = 'general')<\/span>\r\n\t<span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">general<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<h4>\u4ee5\u76f8\u540c\u7684\u4f9d\u8d56\u503c\u8fdb\u884c\u91cd\u65b0\u6e32\u67d3\u3002<\/h4>\n<p>\u5047\u8bbe\u6211\u4eec\u5c06\u4f7f\u7528\u76f8\u540c\u7684roomId=&#8221;general&#8221;\u91cd\u65b0\u6e32\u67d3\u3002JSX\u7684\u8f93\u51fa\u4e0e\u4e0a\u6b21\u76f8\u540c\u3002React\u4f1a\u786e\u4fdd\u6e32\u67d3\u8f93\u51fa\u672a\u53d1\u751f\u53d8\u5316\uff0c\u56e0\u6b64\u4e0d\u4f1a\u66f4\u65b0DOM\u3002<\/p>\n<pre class=\"post-pre\"><code>\t<span class=\"c1\">\/\/ \u518d\u30ec\u30f3\u30c0\u30fc\u306eJSX\u306f\u521d\u671f\u30ec\u30f3\u30c0\u30fc\u3068\u540c\u3058(roomId=\"general\")<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Welcome to general!<span class=\"p\">&lt;\/<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\r\n<\/code><\/pre>\n<p>\u518d\u6e32\u67d3\u7684\u6548\u679c\u4e0e\u521d\u59cb\u6e32\u67d3\u76f8\u540c\u3002React\u4f1a\u6bd4\u8f83\u4e0a\u6b21\u548c\u672c\u6b21\u6e32\u67d3\u7684\u4f9d\u8d56\u6570\u7ec4[&#8216;general&#8217;]\u3002\u4f9d\u8d56\u6570\u7ec4\u6ca1\u6709\u53d8\u5316\u3002\u56e0\u6b64\uff0cReact\u4f1a\u7701\u7565\u5728\u91cd\u65b0\u6e32\u67d3\u4e2d\u6267\u884c\u6548\u679c\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u6548\u679c\u4e0d\u4f1a\u88ab\u8c03\u7528\u3002<\/p>\n<h4>\u4ee5\u4e0d\u540c\u7684\u4f9d\u8d56\u503c\u91cd\u65b0\u6e32\u67d3<\/h4>\n<p>\u5047\u8bbe\u7528\u6237\u5207\u6362\u5230roomId=&#8221;travel&#8221;\u7684<chatroom>\u3002\u7ec4\u4ef6\u5c06\u8fd4\u56de\u4e0d\u540c\u7684JSX\u3002React\u5fc5\u987b\u66f4\u65b0DOM\u3002<\/chatroom><\/p>\n<pre class=\"post-pre\"><code>\t<span class=\"c1\">\/\/ \u518d\u30ec\u30f3\u30c0\u30fc\u306eJSX\u304c\u5909\u308f\u308b(roomId=\"travel\")<\/span>\r\n\t<span class=\"k\">return<\/span> <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Welcome to travel!<span class=\"p\">&lt;\/<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;;<\/span>\r\n<\/code><\/pre>\n<p>\u6548\u679c\u4e5f\u4fee\u6539\u4e86roomId\u7684\u72b6\u6001\u53d8\u91cf\u503c\u3002React\u4f1a\u5c06\u672c\u6b21\u6e32\u67d3\u7684\u4f9d\u8d56\u6570\u7ec4[&#8216;travel&#8217;]\u4e0e\u4e0a\u6b21\u7684[&#8216;general&#8217;]\u8fdb\u884c\u6bd4\u8f83\u3002Object.is(&#8216;travel&#8217;, &#8216;general&#8217;)\u7684\u7ed3\u679c\u4e3afalse\u3002\u7531\u4e8e\u4f9d\u8d56\u4e0d\u540c\uff0c\u6548\u679c\u65e0\u6cd5\u7701\u7565\u3002<\/p>\n<pre class=\"post-pre\"><code>\t<span class=\"c1\">\/\/ \u7570\u306a\u308b\u4f9d\u5b58\u5024\u3067\u518d\u30ec\u30f3\u30c0\u30fc\u3057\u305f\u30a8\u30d5\u30a7\u30af\u30c8(roomId = 'travel')<\/span>\r\n\t<span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">travel<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">disconnect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">},<\/span>\r\n\t<span class=\"c1\">\/\/ \u518d\u30ec\u30f3\u30c0\u30fc\u3067\u5909\u308f\u3063\u305f\u4f9d\u5b58(roomId = 'travel')<\/span>\r\n\t<span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">travel<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<p>\u5728\u5e94\u7528\u6b64\u6b21\u6e32\u67d3\u6548\u679c\u4e4b\u524d\uff0cReact\u9700\u8981\u6267\u884c\u6e05\u7406\u4e0a\u6b21\u6267\u884c\u7684\u6548\u679c\u3002\u4e0a\u6b21\u91cd\u65b0\u6e32\u67d3\u7684\u6548\u679c\u88ab\u7701\u7565\u4e86\u3002React\u9700\u8981\u6e05\u7406\u7684\u662f\u521d\u59cb\u6e32\u67d3\u7684\u6548\u679c\u3002\u6e05\u7406\u7684\u4ee3\u7801\u8c03\u7528\u4e86createConnection(&#8216;general&#8217;)\u521b\u5efa\u7684\u8fde\u63a5\uff0c\u7136\u540e\u8c03\u7528\u4e86disconnect()\u3002\u8fd9\u6837\uff0c\u5e94\u7528\u5c31\u4ece\u540d\u4e3a&#8217;general&#8217;\u7684\u804a\u5929\u5ba4\u4e2d\u65ad\u5f00\u8fde\u63a5\u4e86\u3002<\/p>\n<pre class=\"post-pre\"><code>\t<span class=\"c1\">\/\/ \u521d\u671f\u30ec\u30f3\u30c0\u30fc\u306e\u30a8\u30d5\u30a7\u30af\u30c8(roomId = 'general')<\/span>\r\n\t<span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n\t\t<span class=\"kd\">const<\/span> <span class=\"nx\">connection<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createConnection<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">general<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n\t\t<span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">connect<\/span><span class=\"p\">();<\/span>\r\n\t\t<span class=\"k\">return <\/span><span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">connection<\/span><span class=\"p\">.<\/span><span class=\"nf\">disconnect<\/span><span class=\"p\">();<\/span>\r\n\t<span class=\"p\">},<\/span>\r\n\t<span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">general<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<p>\u7136\u540e\uff0cReact\u4f1a\u6267\u884c\u8fd9\u6b21\u6e32\u67d3\u7684\u6548\u679c\u3002\u65b0\u8fde\u63a5\u7684\u662f\u804a\u5929\u5ba4\u201ctravel\u201d\u3002<\/p>\n<h4>\u5378\u4e0b<\/h4>\n<p>\u5f53\u7528\u6237\u79bb\u5f00\u9875\u9762\u65f6\uff0c<chatroom>\u7ec4\u4ef6\u5c06\u88ab\u5378\u8f7d\u3002React\u5fc5\u987b\u6267\u884c\u6700\u540e\u4e00\u4e2a\u526f\u4f5c\u7528\u7684\u6e05\u7406\u51fd\u6570\u3002\u6700\u540e\u4e00\u4e2a\u526f\u4f5c\u7528\u662f\u5728\u7531\u4e0d\u540c\u7684\u4f9d\u8d56\u503c\u89e6\u53d1\u7684\u91cd\u65b0\u6e32\u67d3\u4e2d\u6267\u884c\u7684\u3002\u6e05\u7406\u51fd\u6570\u5c06\u9500\u6bc1\u4e0ecreateConnection(&#8216;travel&#8217;)\u8fde\u63a5\u76f8\u5173\u7684\u5185\u5bb9\u3002\u5e94\u7528\u7a0b\u5e8f\u5c06\u4ece\u65c5\u884c\u804a\u5929\u5ba4\u4e2d\u65ad\u5f00\u8fde\u63a5\u3002<\/chatroom><\/p>\n<h4>\u53ea\u9488\u5bf9\u5f00\u53d1\u73af\u5883\u7684\u64cd\u4f5c<\/h4>\n<p>\u5728StrictMode\u6a21\u5f0f\u4e0b\u7684\u884c\u4e3a\u662f\u8fd9\u6837\u7684\u3002React\u4f1a\u5148\u5c06\u6240\u6709\u7ec4\u4ef6\u6302\u8f7d\u4e00\u6b21\uff0c\u7136\u540e\u518d\u8fdb\u884c\u91cd\u65b0\u6302\u8f7d\uff08\u72b6\u6001\u548cDOM\u4f1a\u4fdd\u7559\uff09\u3002\u8fd9\u6837\u4e00\u6765\uff0c\u53ef\u4ee5\u660e\u786e\u9700\u8981\u6e05\u7406\u7684\u6548\u679c\uff0c\u5e76\u4e14\u4e5f\u66f4\u5bb9\u6613\u53d1\u73b0\u7c7b\u4f3c\u7ade\u6001\u6761\u4ef6\u7684\u9519\u8bef\u3002\u53e6\u5916\uff0c\u5728\u5f00\u53d1\u73af\u5883\u4e2d\uff0c\u6bcf\u6b21\u4fdd\u5b58\u6587\u4ef6\u65f6\uff0cReact\u90fd\u4f1a\u91cd\u65b0\u6302\u8f7d\u6548\u679c\u3002\u8fd9\u4e9b\u53ea\u53d1\u751f\u5728\u5f00\u53d1\u65f6\u7684\u884c\u4e3a\u3002<\/p>\n<h1>\u603b\u7ed3<\/h1>\n<p>\u5728\u8fd9\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5bf9\u4ee5\u4e0b\u9879\u76ee\u8fdb\u884c\u4e86\u8bf4\u660e\u3002<\/p>\n<ul 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\/>\n\u30a8\u30d5\u30a7\u30af\u30c8\u306e\u3059\u3079\u3066\u306e\u4f9d\u5b58\u304c\u524d\u56de\u306e\u30ec\u30f3\u30c0\u30fc\u6642\u3068\u540c\u3058\u5024\u3067\u3042\u3063\u305f\u3089\u3001React\u306f\u5b9f\u884c\u3092\u7701\u304d\u307e\u3059\u3002<br \/>\n\u4f9d\u5b58\u5024\u306f\u52dd\u624b\u306b\u300c\u9078\u629e\u300d\u3067\u304d\u307e\u305b\u3093\u3002\u30a8\u30d5\u30a7\u30af\u30c8\u5185\u306e\u30b3\u30fc\u30c9\u306b\u3088\u3063\u3066\u6c7a\u307e\u308a\u307e\u3059\u3002<br \/>\n\u7a7a\u306e\u4f9d\u5b58\u914d\u5217([])\u3067\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u5b9f\u884c\u3055\u308c\u308b\u306e\u306f\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u300c\u30de\u30a6\u30f3\u30c8\u6642\u300d\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u753b\u9762\u306b\u8ffd\u52a0\u3055\u308c\u305f\u3068\u304d\u3092\u610f\u5473\u3057\u307e\u3059\u3002StrictMode\u3067\u306f\u3001React\u304c\u5404\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u521d\u671f\u30de\u30a6\u30f3\u30c8\u3059\u308b\u306e\u306f\u305d\u308c\u305e\u308c2\u56de\u305a\u3064\u3067(\u958b\u767a\u74b0\u5883\u306e\u307f)\u3001\u30a8\u30d5\u30a7\u30af\u30c8\u306e\u30b9\u30c8\u30ec\u30b9\u30c6\u30b9\u30c8\u306e\u305f\u3081\u3067\u3059\u3002<br \/>\n\u518d\u30de\u30a6\u30f3\u30c8\u3067\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u7834\u7dbb\u3059\u308b\u3068\u304d\u306f\u3001\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u95a2\u6570\u3092\u5b9f\u88c5\u3057\u3066\u304f\u3060\u3055\u3044\u3002<br \/>\nReact\u304c\u30af\u30ea\u30fc\u30f3\u30a2\u30c3\u30d7\u95a2\u6570\u3092\u547c\u3073\u51fa\u3059\u306e\u306f\u3001\u3064\u304e\u306e\u30a8\u30d5\u30a7\u30af\u30c8\u304c\u5b9f\u884c\u3055\u308c\u308b\u524d\u3068\u30a2\u30f3\u30de\u30a6\u30f3\u30c8\u6642\u3067\u3059\u3002<\/ul>\n<p><\/video><\/p>\n","protected":false},"excerpt":{"rendered":"<p>React\u5b98\u65b9\u7f51\u7ad9\u7684\u6587\u6863\u5df2\u4e8e2023\u5e743\u670816\u65e5\u8fdb\u884c\u4e86\u4fee\u8ba2\uff08\u53c2\u89c1\u300cIntroducing react.dev\u300d [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-38443","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ 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