{"id":38091,"date":"2022-11-26T14:01:47","date_gmt":"2023-10-10T05:59:07","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/react%e5%92%8c%e7%8a%b6%e6%80%81%e7%ae%a1%e7%90%86%e5%ba%93\/"},"modified":"2024-04-29T02:34:16","modified_gmt":"2024-04-28T18:34:16","slug":"react%e5%92%8c%e7%8a%b6%e6%80%81%e7%ae%a1%e7%90%86%e5%ba%93","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/react%e5%92%8c%e7%8a%b6%e6%80%81%e7%ae%a1%e7%90%86%e5%ba%93\/","title":{"rendered":"React\u548c\u72b6\u6001\u7ba1\u7406\u5e93"},"content":{"rendered":"<h2>\u7528\u4e00\u4e2a\u8bcd\u6765\u5f62\u5bb9\u72b6\u6001\u7ba1\u7406\u5e93\u3002<\/h2>\n<p>\u4e3a\u4e86\u89e3\u51b3\u5728React\u6216Vue\u4e2d\u4f20\u9012state\u7684\u6e38\u620f\u800c\u8bde\u751f\u7684\u4e1c\u897f\u3002<\/p>\n<p>\u603b\u4f53\u6765\u8bf4\uff0cRedux\u7684\u89e3\u51b3\u65b9\u6848\u662f\u8ba9\u5927\u5bb6\u5171\u540c\u7ba1\u7406\u4e00\u4e2a\u516c\u5171\u7684\u7559\u8a00\u677f\u4ee5\u7ba1\u7406\u72b6\u6001\u3002<\/p>\n<h2>\u4e3a\u4ec0\u4e48\u8981\u4f7f\u7528\u72b6\u6001\u7ba1\u7406\u5e93\uff1f<\/h2>\n<p>\u5982\u4f55\u4f7f\u7528\u72b6\u6001\u7ba1\u7406\u5e93\u53ef\u80fd\u9700\u8981\u67e5\u9605\u6765\u4e86\u89e3\uff0c\u4f46\u8981\u7406\u89e3\u4f7f\u7528\u72b6\u6001\u7ba1\u7406\u5e93\u7684\u76ee\u7684\uff0c\u5219\u9996\u5148\u9700\u8981\u4e86\u89e3\u4e0eReact\u76f8\u5173\u7684\u77e5\u8bc6\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u4e86\u89e3\u72b6\u6001\u7ba1\u7406\u5e93\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u53ef\u4ee5\u5c06\u72b6\u51b5\u7ba1\u7406\u5e93\u7684\u529f\u80fd\u603b\u7ed3\u5982\u4e0b\uff1a<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30c6\u30fc\u30c8\u306e\u7ba1\u7406<\/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\">props drilling\u306e\u7de9\u548c<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e0d\u8981\u306a\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u66f4\u65b0\u3092\u306a\u304f\u3059<\/ul>\n<p>&#8230;\u7b49\u7b49<\/p>\n<p>\u8fd9\u4e9b\u4f18\u70b9\u90fd\u662f\u57fa\u4e8eReact\u89e3\u51b3\u67d0\u4e9b\u6311\u6218\u7684\uff0c\u4f46\u662f\u5982\u679c\u6ca1\u6709\u4e30\u5bcc\u7684React\u5f00\u53d1\u7ecf\u9a8c\uff0c\u5f88\u96be\u7406\u89e3\u3002<\/p>\n<h2>\u4e3a\u4ec0\u4e48\u8981\u7ba1\u7406\u72b6\u6001\uff1f<\/h2>\n<p>\u5f53\u8c08\u5230\u72b6\u6001\u7ba1\u7406\u5e93\u65f6\uff0c\u663e\u7136\u5b83\u5bf9\u4e8e\u72b6\u6001\u7ba1\u7406\u975e\u5e38\u6709\u7528\u3002<br \/>\n\u4f46\u9996\u5148\u6211\u4eec\u8981\u5f04\u6e05\u695a\uff0c\u5728\u4ec0\u4e48\u60c5\u51b5\u4e0b\u6211\u4eec\u9700\u8981\u7ba1\u7406\u72b6\u6001\uff1f<br \/>\n\u672c\u6587\u5c06\u5bf9\u6b64\u8fdb\u884c\u8c03\u67e5\u7814\u7a76\u3002<br \/>\n\u8bf7\u5c06\u72b6\u6001\u7ba1\u7406\u5e93\u89c6\u4e3a\u4e00\u4e2a\u53ef\u4ee5\u7ba1\u7406\u6574\u4e2a\u72b6\u6001\u7684\u5e93\u3002<br \/>\n\u6b64\u5916\uff0c\u6211\u4eec\u5e0c\u671b\u60a8\u5c06React\u7684\u72b6\u6001\u57fa\u672c\u4e0a\u89c6\u4e3a\u672c\u5730\u72b6\u6001\u3002<br \/>\n\u5f53\u6211\u4eec\u5c1d\u8bd5\u5c06\u5176\u4e0e\u5176\u4ed6\u7ec4\u4ef6\u5171\u4eab\u65f6\uff0c<br \/>\n\u4f1a\u6d89\u53ca\u4ee5\u4e0b\u4e0eReact\u76f8\u5173\u7684\u4e3b\u9898\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306e\u89aa\u5b50\u95a2\u4fc2\u3068\u306f<\/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\">\u518d\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u3068\u306f?<\/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\">useState\u3067\u4f55\u304c\u3067\u304d\u308b?<\/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\">useContext\u3067\u4f55\u304c\u3067\u304d\u308b?<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">props drilling\u3068\u306f?<\/ul>\n<p>\u5728\u4f7f\u7528\u72b6\u6001\u7ba1\u7406\u5e93\u4e4b\u524d\uff0c\u5e94\u8be5\u5148\u7406\u89e3\u8fd9\u7bc7\u6587\u7ae0\u6574\u7406\u51fa\u6765\u7684\u8fd9\u4e9b\u77e5\u8bc6\u3002\u6700\u540e\u8fd8\u4f1a\u7a0d\u5fae\u4ecb\u7ecd\u4e00\u4e0bRedux\u3002<\/p>\n<h2>\u7ec4\u4ef6\u7684\u7236\u5b50\u5173\u7cfb\u662f\u4ec0\u4e48\u610f\u601d<\/h2>\n<p>\u5b50\u5143\u7d20\u88ab\u5d4c\u5957\u5728\u7236\u5143\u7d20\u4e2d\u3002\u5d4c\u5957\u7684\u662f\u7236\u5143\u7d20\u3002<br \/>\n\u5c31\u662f\u8fd9\u6837\u3002<br \/>\nprops\u57fa\u672c\u4e0a\u53ea\u80fd\u4ece\u7236\u5143\u7d20\u4f20\u9012\u7ed9\u5b50\u5143\u7d20\u3002<\/p>\n<h2>\u6e32\u67d3\u662f\u6307\u5c06\u56fe\u50cf\u6216\u5f71\u50cf\u4ee5\u89c6\u89c9\u6548\u679c\u5448\u73b0\u51fa\u6765\u7684\u8fc7\u7a0b\u3002<\/h2>\n<p>\u5f53state\u6216props\u53d1\u751f\u53d8\u5316\u65f6\uff0cReact\u4f1a\u8fdb\u884c\u7ec4\u4ef6\u7684\u66f4\u65b0\u8fc7\u7a0b\u3002\u603b\u7ed3\u8fd9\u4e2a\u8fc7\u7a0b\u5982\u4e0b\u6240\u793a\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u307e\u305aReact\u304c\u4eee\u60f3DOM\u306b\u65b0\u3057\u3044\u72b6\u614b\u3092\u53cd\u6620\u3059\u308b\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\">\u305d\u306e\u6642\u53e4\u3044\u65b9\u306e\u4eee\u60f3DOM\u3068\u6bd4\u8f03\u3059\u308b\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u5909\u308f\u3063\u305f\u3068\u3053\u308d\u3060\u3051\u5b9f\u969b\u306eDOM\u306b\u53cd\u6620\u3059\u308b\u3002<\/ul>\n<p>\u4f60\u53ef\u4ee5\u628aReact\u7684\u6e32\u67d3\u770b\u4f5c\u662f\u7ec4\u4ef6\u7684\u66f4\u65b0\u3002<\/p>\n<h3>\u5907\u8003<\/h3>\n<p>\u987a\u4fbf\u63d0\u4e00\u4e0b\uff0c\u52a0\u8f7dDOM\u662f\u7531\u6d4f\u89c8\u5668\u5b8c\u6210\u7684\u3002<br \/>\n\u4ee5React\u6240\u63d0\u4f9b\u7684\u7ec4\u4ef6\u66f4\u65b0\u65b9\u5f0f\u6765\u8bf4\uff0c\u4e0d\u662f\u901a\u8fc7\u6d4f\u89c8\u5668\u52a0\u8f7dDOM\u3002<br \/>\n\u53ea\u662f\u5728\u8fc7\u53bb\u7684\uff08\u82f1\u6587\uff09\u6587\u6863\u4e2d\u4f3c\u4e4e\u6709\u4e00\u6bb5\u65f6\u95f4\u8fd9\u4e24\u4e2a\u672f\u8bed\u88ab\u6df7\u5408\u4f7f\u7528\u3002<\/p>\n<p>\u53c2\u8003\uff1aReact\u6587\u6863\u7684\u7ffb\u8bd1\u8005\u7ecf\u5e38\u5728\u4e0b\u9762\u7684\u6587\u7ae0\u8bc4\u8bba\u533a\u51fa\u73b0\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u6700\u8fd1\u4f3c\u4e4e\u51b3\u5b9a\u5c06\u6d4f\u89c8\u5668\u7684DOM\u52a0\u8f7d\u79f0\u4e3a\u201c\u7ed8\u5236\u201d\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>useState\u662f\u4ec0\u4e48\u610f\u601d<\/h2>\n<p>&nbsp;<\/p>\n<p>\u9700\u8981\u4f7f\u7528 state \u7684\u539f\u56e0\u6709\u4e24\u4e2a\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u672c\u5730\u53d8\u91cf\u5728\u6e32\u67d3\u4e4b\u95f4\u4e0d\u4f1a\u6301\u7eed\u5b58\u5728<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u672c\u5730\u53d8\u91cf\u4e0d\u4f1a\u89e6\u53d1\u6e32\u67d3<\/ol>\n<p>\u5982\u679c\u6709\u8fd9\u6837\u7684\u4e1c\u897f\uff0c\u5c31\u53ef\u4ee5\u66f4\u65b0UI\u4e86\u5462\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728\u6e32\u67d3\u8fc7\u7a0b\u4e2d\u6301\u6709\u6570\u636e\u7684\u72b6\u6001\u53d8\u91cf<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u4f7fReact\u80fd\u591f\u91cd\u65b0\u52a0\u8f7d\u7ec4\u4ef6\u7684\u51fd\u6570<\/ol>\n<p>\u800c\u4e14\uff0c\u8fd9\u6b63\u662fuseState\u6240\u63d0\u4f9b\u7684\u4e1c\u897f\u3002<\/p>\n<h2>\u7ec4\u4ef6\u7684\u66f4\u65b0<\/h2>\n<p>\u5f53\u7ec4\u4ef6\u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u8be5\u7ec4\u4ef6\u7684\u5916\u89c2\u4f1a\u88ab\u66f4\u65b0\u3002<br \/>\n\u53e6\u5916\uff0c\u5f53\u7236\u7ec4\u4ef6\u88ab\u66f4\u65b0\u65f6\uff0c\u5d4c\u5957\u5728\u5176\u4e2d\u7684\u5b50\u7ec4\u4ef6\u4e5f\u4f1a\u88ab\u66f4\u65b0\u3002<\/p>\n<p>\u5982\u540c\u53c2\u8003\u6587\u7ae0\u6240\u8ff0\uff0c\u82e5\u8981\u907f\u514d\u7ec4\u4ef6\u66f4\u65b0\uff0c\u5219\u5b58\u5728\u4e00\u79cd\u6a21\u5f0f\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u5206\u6790 props drilling \u662f\u4e00\u79cd\u4f7f\u7528\u7269\u4ef6\u8f85\u52a9\u5b66\u4e60\u6216\u7ec3\u4e60\u7684\u65b9\u5f0f\u3002<\/h2>\n<p>\u4f60\u8fd8\u8bb0\u5f97props\u53ea\u80fd\u4ece\u7236\u7ea7\u7ec4\u4ef6\u4f20\u9012\u7ed9\u5b50\u7ea7\u7ec4\u4ef6\u5417\uff1f<br \/>\n\u5b50\u7ec4\u4ef6\u9700\u8981\u7236\u7ec4\u4ef6\u8fdb\u884c\u5d4c\u5957\u3002<br \/>\n\u6362\u53e5\u8bdd\u8bf4\uff0c\u5f53\u51fa\u73b0\u5728\u5d4c\u5957\u7ec4\u4ef6\u4e2d\u4f20\u9012props\u7ed9\u201c\u5d4c\u5957\u7684\u7ec4\u4ef6\u4e2d\u7684\u5d4c\u5957\u7684\u7ec4\u4ef6\u201d\u8fd9\u6837\u7684\u60c5\u51b5\u3002<br \/>\n\u8fd9\u6837\u6df1\u5c42\u4f20\u9012props\u7684\u73b0\u8c61\u88ab\u79f0\u4e3aprops drilling\u3002<\/p>\n<h2>useContext \u662f\u4ec0\u4e48\uff1f<\/h2>\n<p>&nbsp;<\/p>\n<p>\u5728\u89e3\u51b3props drilling\u95ee\u9898\u65f6\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u4ece\u8fdc\u79bb\u7684\u7236\u7ec4\u4ef6\u4e2d\u83b7\u53d6\u6570\u636e\u7684\u6df1\u5ea6\u5d4c\u5957\u7ec4\u4ef6\u3002\u5728\u4e0a\u4e0b\u6587\u4e2d\uff0c\u83b7\u53d6\u6570\u636e\u53ef\u4ee5\u7c7b\u6bd4\u4e3a\u201c\u8dc3\u8fc1\u201d\u3002\u4e0e\u9010\u7ea7\u4f20\u9012props\u4e0d\u540c\uff0c\u8fd9\u79cd\u65b9\u6cd5\u66f4\u52a0\u4fbf\u6377\u3002<\/p>\n<p>\u8bf7\u6309\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff08\u8be6\u7ec6\u4fe1\u606f\u8bf7\u53c2\u8003\u6587\u6863\uff09\u3002<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u4f7f\u7528createContext<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u7236\u7ec4\u4ef6\u63d0\u4f9b\u4e86\u8be5Provider<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u6df1\u5c42\u5d4c\u5957\u7684\u7ec4\u4ef6\u4f7f\u7528\u4e86useContext<\/ol>\n<h2>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6709\u8fd9\u6837\u4e00\u6bb5\u4ee3\u7801\u7247\u6bb5\u3002<\/h2>\n<p>\u5c06https:\/\/playcode.io\/react\u8f6c\u4e3a\u53ef\u590d\u5236\u7c98\u8d34\u5e76\u8fdb\u884c\u8bd5\u9a8c\u7684\u4ee3\u7801\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"nx\">React<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span><span class=\"nx\">useState<\/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=\"k\">export<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <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  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n    <span class=\"p\">&lt;<\/span><span class=\"nt\">div<\/span> <span class=\"na\">className<\/span><span class=\"p\">=<\/span><span class=\"s\">'App'<\/span><span class=\"p\">&gt;<\/span>\r\n      <span class=\"p\">&lt;<\/span><span class=\"nt\">h1<\/span><span class=\"p\">&gt;<\/span>Count: <span class=\"si\">{<\/span><span class=\"nx\">count<\/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\">&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\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">+<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>Increment<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\r\n      <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\">setCount<\/span><span class=\"p\">(<\/span><span class=\"nx\">count<\/span> <span class=\"o\">-<\/span> <span class=\"mi\">1<\/span><span class=\"p\">)<\/span><span class=\"si\">}<\/span><span class=\"p\">&gt;<\/span>Decrement<span class=\"p\">&lt;\/<\/span><span class=\"nt\">button<\/span><span class=\"p\">&gt;<\/span>\r\n    <span class=\"p\">&lt;\/<\/span><span class=\"nt\">div<\/span><span class=\"p\">&gt;<\/span>\r\n  <span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u6bb5\u4ee3\u7801\u975e\u5e38\u7b80\u6d01\u3002<br \/>\n\u4f46\u4e3a\u4ec0\u4e48\u5b83\u7b80\u6d01\u5462\uff1f\u56e0\u4e3a\u8fd9\u91cc\u53ea\u5b58\u5728\u5c40\u90e8\u72b6\u6001\u3002<br \/>\n\u5f53\u5c40\u90e8\u72b6\u6001\u589e\u52a0\u65f6\uff0c\u8ba1\u6570\u4e5f\u4f1a\u589e\u52a0\u3002<br \/>\n\u8ba1\u6570\u8fd9\u4e2a\u72b6\u6001\u4e0d\u4f1a\u79bb\u5f00\u8fd9\u4e2a\u7ec4\u4ef6\u3002<\/p>\n<h2>\u8981\u5728\u5176\u4ed6\u7ec4\u4ef6\u4e2d\u4f7f\u7528count\u7684\u72b6\u6001\uff0c\u5e94\u8be5\u600e\u4e48\u505a\uff1f<\/h2>\n<p>\u5982\u679c\u6709\u5f88\u591a\u60f3\u8981\u5171\u4eab\u7684\u7ec4\u4ef6\uff0c\u4e00\u79cd\u65b9\u6cd5\u662f\u5148\u521b\u5efa\u5b50\u7ec4\u4ef6\u5e76\u5c06\u5176\u4f5c\u4e3aprops\u4f20\u9012\u3002<\/p>\n<p>\u8fd8\u6709\u4e24\u4e2a\u9009\u62e9\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Context\u3092\u4f7f\u3046<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">Redux\u306a\u3069\u306e\u72b6\u614b\u7ba1\u7406\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u4f7f\u3046<\/ul>\n<h2>\u7ec8\u4e8e\u80fd\u591f\u5145\u5206\u5229\u7528\u72b6\u6001\u7ba1\u7406\u5e93\u7684\u4f18\u52bf\u4e86\u3002<\/h2>\n<p>\u7b80\u5355\u6765\u8bf4\uff0c\u72b6\u6001\u7ba1\u7406\u5e93\u4e0eReact\u63d0\u4f9b\u7684useContext\u6709\u76f8\u4f3c\u7684\u76ee\u7684<\/p>\n<p>\u505a\u7684\u4e8b\u60c5\u53d8\u591a + \u8fd8\u4f1a\u5e26\u6765\u76f8\u5e94\u7684\u597d\u5904<\/p>\n<p>\u4f7f\u7528Redux\uff0c\u53ef\u4ee5\u6d88\u9664\u7ec4\u4ef6\u4e2d\u64cd\u4f5cstate\u7684\u4ee3\u7801\uff08\u5c06\u5176\u5206\u79bb\u5230\u53e6\u4e00\u4e2a\u6587\u4ef6\u4e2d\uff09\uff0c\u8fd9\u6837\u5c31\u80fd\u8fbe\u5230\u8fd9\u79cd\u611f\u89c9\u3002<\/p>\n<h2>\u7528Redux\u5728\u4e4b\u524d\u7684\u4ee3\u7801\u4e2d\u5c1d\u8bd5\u4e00\u4e0b<\/h2>\n<p>\u5982\u679c\u4e3a\u4e86\u4e00\u4e2a\u53ea\u662f\u901a\u8fc7\u6309\u4e0b\u6309\u94ae\u6765\u589e\u52a0\u6216\u51cf\u5c11\u8ba1\u6570\u7684\u5e94\u7528\u800c\u7279\u610f\u4f7f\u7528Redux\uff0c\u4f1a\u6709\u4ec0\u4e48\u7ed3\u679c\u5462\uff1f\u4f1a\u5c06\u5176\u62c6\u5206\u6210App.js\u3001action.js\u548creducer.js\u4e09\u4e2a\u90e8\u5206\u3002<\/p>\n<h3>\u9996\u5148\u4ece\u5bfc\u5165\u90e8\u5206\u5f00\u59cb<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">import<\/span> <span class=\"nx\">React<\/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<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">useSelector<\/span><span class=\"p\">,<\/span> <span class=\"nx\">useDispatch<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">react-redux<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"k\">import<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">increment<\/span><span class=\"p\">,<\/span> <span class=\"nx\">decrement<\/span> <span class=\"p\">}<\/span> <span class=\"k\">from<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">.\/action<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u8bf7\u6ce8\u610f\uff0c\u6211\u4eec\u4ece&#8221;.\/action&#8221;\u6587\u4ef6\u4e2d\u5bfc\u5165\u4e86&#8221;increment&#8221;\u548c&#8221;decrement&#8221;\u4e24\u4e2a\u51fd\u6570\u3002<br \/>\n\u6b64\u5916\uff0c\u6211\u4eec\u8fd8\u4ecereact-redux\u4e2d\u5bfc\u5165\u4e86\u540d\u4e3a&#8221;useSelector&#8221;\u548c&#8221;useDispatch&#8221;\u7684\u4f7f\u7528\u76f8\u5173\u5185\u5bb9\u3002<\/p>\n<h3>\u5173\u4e8euseSelector\u548cuseDispatch<\/h3>\n<p>&nbsp;<\/p>\n<p>\u6211\u5c06\u51e0\u4e4e\u76f4\u63a5\u5f15\u7528\u8fd9\u7bc7\u6587\u7ae0\u7684\u8bf4\u660e\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">useSelector&#8230;state\u306b\u5909\u66f4\u304c\u3042\u3063\u305f\u3089\u81ea\u52d5\u7684\u306b\u518d\u5b9f\u884c\u3055\u308c\u3001\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u518d\u63cf\u753b\u3059\u308b<\/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\">useDispatch\u306fdispatch\u95a2\u6570\u3092\u8fd4\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">dispatch\u95a2\u6570\u306f\u3001&#8221;action&#8221;\u3092\u5f15\u6570\u306b\u3068\u308b\u3002\u5b9f\u884c\u3059\u308b\u3068\u3001state\u304c\u66f4\u65b0\u3055\u308c\u308b<\/ul>\n<pre class=\"post-pre\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">App<\/span><span class=\"p\">()<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">count<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useSelector<\/span><span class=\"p\">(<\/span><span class=\"nx\">state<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">count<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">dispatch<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">useDispatch<\/span><span class=\"p\">();<\/span>\r\n\r\n  <span class=\"k\">return <\/span><span class=\"p\">(<\/span>\r\n    <span class=\"o\">&lt;<\/span><span class=\"nx\">div<\/span><span class=\"o\">&gt;<\/span>\r\n      <span class=\"o\">&lt;<\/span><span class=\"nx\">p<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">Count<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span><span class=\"nx\">count<\/span><span class=\"p\">}<\/span><span class=\"o\">&lt;<\/span><span class=\"sr\">\/p<\/span><span class=\"err\">&gt;\r\n<\/span>      <span class=\"o\">&lt;<\/span><span class=\"nx\">button<\/span> <span class=\"nx\">onClick<\/span><span class=\"o\">=<\/span><span class=\"p\">{()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">dispatch<\/span><span class=\"p\">(<\/span><span class=\"nf\">increment<\/span><span class=\"p\">())}<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">Increment<\/span><span class=\"o\">&lt;<\/span><span class=\"sr\">\/button<\/span><span class=\"err\">&gt;\r\n<\/span>      <span class=\"o\">&lt;<\/span><span class=\"nx\">button<\/span> <span class=\"nx\">onClick<\/span><span class=\"o\">=<\/span><span class=\"p\">{()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">dispatch<\/span><span class=\"p\">(<\/span><span class=\"nf\">decrement<\/span><span class=\"p\">())}<\/span><span class=\"o\">&gt;<\/span><span class=\"nx\">Decrement<\/span><span class=\"o\">&lt;<\/span><span class=\"sr\">\/button<\/span><span class=\"err\">&gt;\r\n<\/span>        <span class=\"c1\">\/\/ onClick\u306e\u3068\u3053\u308d\u3067action\u3092\u4f7f\u3046<\/span>\r\n    <span class=\"o\">&lt;<\/span><span class=\"sr\">\/div<\/span><span class=\"err\">&gt;\r\n<\/span>  <span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"k\">default<\/span> <span class=\"nx\">App<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u77e5\u9053dispatch\u51fd\u6570\u88ab\u7528\u6765\u53d1\u51faaction\u3002<\/p>\n<h2>\u67e5\u770baction\u7684\u5b9a\u4e49<\/h2>\n<pre class=\"post-pre\"><code><span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">increment<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">INCREMENT<\/span><span class=\"dl\">'<\/span>\r\n  <span class=\"p\">};<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">decrement<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">DECREMENT<\/span><span class=\"dl\">'<\/span>\r\n  <span class=\"p\">};<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5728\u8fd9\u91cc\u6307\u5b9a\u4e86\u4e00\u4e2a\u4e0d\u77e5\u6240\u4e91\u7684\u7c7b\u578b\uff1a\u201cINCREMENT\u201d\u3002<br \/>\n\u589e\u91cf\uff08increment\uff09\u548c\u51cf\u91cf\uff08decrement\uff09\u5b9e\u9645\u4e0a\u662f\u666e\u901a\u7684 JavaScript \u51fd\u6570\u3002<\/p>\n<h2>\u4f7f\u7528\u589e\u91cf\u548c\u51cf\u91cf\u51fd\u6570\u7684\u6587\u4ef6\u3002<\/h2>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">initialState<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"k\">export<\/span> <span class=\"kd\">const<\/span> <span class=\"nx\">counterReducer<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">state<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">initialState<\/span><span class=\"p\">,<\/span> <span class=\"nx\">action<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">action<\/span><span class=\"p\">.<\/span><span class=\"nx\">type<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">INCREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"nx\">state<\/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    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">DECREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"nx\">state<\/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    <span class=\"nl\">default<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">state<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<\/code><\/pre>\n<p>\u5148\u524d\u7684\u6307\u5b9a\u662f\u5728\u9019\u7a2e\u908f\u8f2f\u5206\u652f\u4e2d\u4f7f\u7528\u7684\u3002<br \/>\n\u9019\u5c31\u662f Redux \u7684\u512a\u9ede\uff0c\u53ef\u4ee5\u5c07\u72c0\u614b\u64cd\u4f5c\u5b8c\u5168\u5206\u96e2\u5230\u4e0d\u540c\u7684\u6587\u4ef6\u4e2d\u3002<\/p>\n<p>\u5982\u679cstate\u672a\u88ab\u5b9a\u4e49\uff0c\u90a3\u4e48\u5c06\u4f7f\u7528initialState\u4f5c\u4e3a\u7b2c\u4e00\u4e2a\u53c2\u6570state\u7684\u8d4b\u503c\u3002<\/p>\n<p>\u987a\u4fbf\u8bf4\u4e00\u4e0b\uff0c\u5173\u4e8e\u8fd9\u4e2a counterReducer\uff0c\u6211\u8ba4\u4e3a\u5728\u4e4b\u524d\u7684\u4ee3\u7801\u4e2d\u6ca1\u6709\u4f7f\u7528\u8fc7\u3002<br \/>\n\u672c\u6587\u7701\u7565\u4e86\u89e3\u91ca\u3002<br \/>\n\u8bf7\u9605\u8bfb\u6709\u5173 Redux \u7684\u6587\u7ae0\u3002<\/p>\n<h2>\u5bf9\u4e8e\u5e0c\u671b\u5148\u590d\u5236\u7c98\u8d34\u7136\u540e\u8bd5\u8bd5\u7684\u60a8<\/h2>\n<h3>\u5c06\u4ee5\u4e0b\u4ee3\u7801\u653e\u5165\u540c\u4e00\u76ee\u5f55\u4e2d\uff0c\u5c06index.html\u62d6\u653e\u5230\u6d4f\u89c8\u5668\u4e2d\u5373\u53ef\u8fd0\u884c\u3002<\/h3>\n<p>\u4eceChatGPT\u83b7\u5f97\u7684\u6587\u7ae0\u636e\u8bf4\u5982\u4e0b\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"cp\">&lt;!DOCTYPE html&gt;<\/span>\r\n<span class=\"nt\">&lt;html<\/span> <span class=\"na\">lang=<\/span><span class=\"s\">\"en\"<\/span><span class=\"nt\">&gt;<\/span>\r\n<span class=\"nt\">&lt;head&gt;<\/span>\r\n  <span class=\"nt\">&lt;meta<\/span> <span class=\"na\">charset=<\/span><span class=\"s\">\"UTF-8\"<\/span><span class=\"nt\">&gt;<\/span>\r\n  <span class=\"nt\">&lt;title&gt;<\/span>Simple React-Redux Example<span class=\"nt\">&lt;\/title&gt;<\/span>\r\n  <span class=\"nt\">&lt;script <\/span><span class=\"na\">src=<\/span><span class=\"s\">\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/react\/17.0.1\/umd\/react.production.min.js\"<\/span><span class=\"nt\">&gt;&lt;\/script&gt;<\/span>\r\n  <span class=\"nt\">&lt;script <\/span><span class=\"na\">src=<\/span><span class=\"s\">\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/react-dom\/17.0.1\/umd\/react-dom.production.min.js\"<\/span><span class=\"nt\">&gt;&lt;\/script&gt;<\/span>\r\n  <span class=\"nt\">&lt;script <\/span><span class=\"na\">src=<\/span><span class=\"s\">\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/redux\/4.0.5\/redux.min.js\"<\/span><span class=\"nt\">&gt;&lt;\/script&gt;<\/span>\r\n  <span class=\"nt\">&lt;script <\/span><span class=\"na\">src=<\/span><span class=\"s\">\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/react-redux\/7.2.4\/react-redux.min.js\"<\/span><span class=\"nt\">&gt;&lt;\/script&gt;<\/span>\r\n<span class=\"nt\">&lt;\/head&gt;<\/span>\r\n<span class=\"nt\">&lt;body&gt;<\/span>\r\n  <span class=\"nt\">&lt;div<\/span> <span class=\"na\">id=<\/span><span class=\"s\">\"root\"<\/span><span class=\"nt\">&gt;&lt;\/div&gt;<\/span>\r\n  <span class=\"nt\">&lt;script <\/span><span class=\"na\">src=<\/span><span class=\"s\">\".\/app.js\"<\/span><span class=\"nt\">&gt;&lt;\/script&gt;<\/span>\r\n<span class=\"nt\">&lt;\/body&gt;<\/span>\r\n<span class=\"nt\">&lt;\/html&gt;<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ action.js<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">increment<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">({<\/span>\r\n  <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">INCREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">decrement<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">({<\/span>\r\n  <span class=\"na\">type<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">DECREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"c1\">\/\/ reducer.js<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">initialState<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">counterReducer<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">state<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">initialState<\/span><span class=\"p\">,<\/span> <span class=\"nx\">action<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">action<\/span><span class=\"p\">.<\/span><span class=\"nx\">type<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">INCREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"nx\">state<\/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    <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">DECREMENT<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"p\">{<\/span> <span class=\"na\">count<\/span><span class=\"p\">:<\/span> <span class=\"nx\">state<\/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    <span class=\"nl\">default<\/span><span class=\"p\">:<\/span>\r\n      <span class=\"k\">return<\/span> <span class=\"nx\">state<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"c1\">\/\/ Store<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">createStore<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">Redux<\/span><span class=\"p\">;<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">store<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">createStore<\/span><span class=\"p\">(<\/span><span class=\"nx\">counterReducer<\/span><span class=\"p\">);<\/span>\r\n\r\n<span class=\"c1\">\/\/ App.js<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">App<\/span> <span class=\"o\">=<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">dispatch<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ReactRedux<\/span><span class=\"p\">.<\/span><span class=\"nf\">useDispatch<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">count<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ReactRedux<\/span><span class=\"p\">.<\/span><span class=\"nf\">useSelector<\/span><span class=\"p\">((<\/span><span class=\"nx\">state<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">state<\/span><span class=\"p\">.<\/span><span class=\"nx\">count<\/span><span class=\"p\">);<\/span>\r\n\r\n  <span class=\"k\">return<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span>\r\n    <span class=\"dl\">'<\/span><span class=\"s1\">div<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"kc\">null<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">h1<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"kc\">null<\/span><span class=\"p\">,<\/span> <span class=\"s2\">`Count: <\/span><span class=\"p\">${<\/span><span class=\"nx\">count<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">button<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">dispatch<\/span><span class=\"p\">(<\/span><span class=\"nf\">increment<\/span><span class=\"p\">())<\/span> <span class=\"p\">},<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Increment<\/span><span class=\"dl\">'<\/span><span class=\"p\">),<\/span>\r\n    <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">button<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"na\">onClick<\/span><span class=\"p\">:<\/span> <span class=\"p\">()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nf\">dispatch<\/span><span class=\"p\">(<\/span><span class=\"nf\">decrement<\/span><span class=\"p\">())<\/span> <span class=\"p\">},<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Decrement<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span>\r\n  <span class=\"p\">);<\/span>\r\n<span class=\"p\">};<\/span>\r\n\r\n<span class=\"c1\">\/\/ index.js<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">Provider<\/span> <span class=\"p\">}<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ReactRedux<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nx\">ReactDOM<\/span><span class=\"p\">.<\/span><span class=\"nf\">render<\/span><span class=\"p\">(<\/span>\r\n  <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span><span class=\"nx\">Provider<\/span><span class=\"p\">,<\/span> <span class=\"p\">{<\/span> <span class=\"nx\">store<\/span> <span class=\"p\">},<\/span> <span class=\"nx\">React<\/span><span class=\"p\">.<\/span><span class=\"nf\">createElement<\/span><span class=\"p\">(<\/span><span class=\"nx\">App<\/span><span class=\"p\">)),<\/span>\r\n  <span class=\"nb\">document<\/span><span class=\"p\">.<\/span><span class=\"nf\">getElementById<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">root<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">);<\/span>\r\n\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u7528\u4e00\u4e2a\u8bcd\u6765\u5f62\u5bb9\u72b6\u6001\u7ba1\u7406\u5e93\u3002 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