{"id":32426,"date":"2023-11-22T08:48:29","date_gmt":"2024-01-04T09:17:40","guid":{"rendered":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%96%e6%98%af%e4%b8%ba%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%e8%80%85%e5%87%86%e5%a4%87%e7%9a%84%ef%bc%9a%e3%80%8ajavascript-ecmascript%e6%96%87%e6%b3%95%e9%80%9f%e5%ad%a6%e5%8f%82%e8%80%83\/"},"modified":"2024-05-04T10:15:26","modified_gmt":"2024-05-04T02:15:26","slug":"%e4%bb%96%e6%98%af%e4%b8%ba%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%e8%80%85%e5%87%86%e5%a4%87%e7%9a%84%ef%bc%9a%e3%80%8ajavascript-ecmascript%e6%96%87%e6%b3%95%e9%80%9f%e5%ad%a6%e5%8f%82%e8%80%83","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/zh\/blog\/%e4%bb%96%e6%98%af%e4%b8%ba%e8%af%ad%e8%a8%80%e5%ad%a6%e4%b9%a0%e8%80%85%e5%87%86%e5%a4%87%e7%9a%84%ef%bc%9a%e3%80%8ajavascript-ecmascript%e6%96%87%e6%b3%95%e9%80%9f%e5%ad%a6%e5%8f%82%e8%80%83\/","title":{"rendered":"\u4ed6\u662f\u4e3a\u8bed\u8a00\u5b66\u4e60\u8005\u51c6\u5907\u7684\uff1a\u300aJavaScript\/ECMAScript\u6587\u6cd5\u901f\u5b66\u53c2\u8003\u300b@2023-12"},"content":{"rendered":"<p>\u8bf7\u6ce8\u610f\uff1a\u6b64\u6587\u7ae0\u662f\u6211\u4eec\u516c\u53f8\u57282023\u5e74\u7b2c\u56db\u5b63\u5ea6\u516c\u5f00\u7684\u65b0\u5458\u5de5\u5165\u804c\u6307\u5357\u8d44\u6599\u3002<\/p>\n<p>\u8fd9\u662f\u9762\u5411\u5177\u6709\u5176\u4ed6\u8bed\u8a00\u7ecf\u9a8c\u7684\u4eba\u7684JS\/ECMAScript\u57fa\u672c\u8bed\u6cd5\u3002<\/p>\n<h2>\u6267\u884c\u73af\u5883<\/h2>\n<p>\u5728JavaScript\u7684\u5904\u7406\u7cfb\u7edf\u4e2d\u6709\u5404\u79cd\u4e0d\u540c\u7684\u5b58\u5728\u3002\u5927\u81f4\u53ef\u4ee5\u5206\u4e3a\u4ee5\u4e0b\u51e0\u7c7b\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d6\u30e9\u30a6\u30b6\u4e0a\u3067\u306e\u5b9f\u884c<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">NodeJS\u4e0a\u3067\u306e\u5b9f\u884c<\/ul>\n<p>\u5728\u4e0d\u540c\u7684\u73af\u5883\u4e0b\uff0cECMAScript\u7684\u53ef\u8fd0\u884c\u7248\u672c\u3001\u53ef\u7528\u7684\u8fd0\u884c\u73af\u5883\u548c\u6a21\u5757\u89e3\u6790\u65b9\u6cd5\u90fd\u6709\u6240\u4e0d\u540c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u95a2\u3057\u3066\u306f\u3001ECMAScript2020\u76f8\u5f53\u306e\u30b3\u30fc\u30c9\u3067\u3042\u308c\u3070\u307b\u307c\u3059\u3079\u3066\u306e\u74b0\u5883\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u3066\u304a\u308a\u30012023\u5e74\u73fe\u5728\u3067\u56f0\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\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\">\u30e9\u30f3\u30bf\u30a4\u30e0\u306b\u95a2\u3057\u3066\u306f\u3001\u30d6\u30e9\u30a6\u30b6\u3068NodeJS\u3067\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u30e2\u30b8\u30e5\u30fc\u30eb\u89e3\u6c7a\u65b9\u6cd5\u306b\u306f\u3001 CommonJS\u65b9\u5f0f\u3068ECMAScript Module(ESM)\u65b9\u5f0f\u304c\u6df7\u5728\u3057\u3066\u3044\u307e\u3059\u3002\u5c06\u6765\u7684\u306bESM\u306b\u7d71\u4e00\u3055\u308c\u308b\u65b9\u5411\u6027\u3068\u306f\u306a\u308b\u3082\u306e\u306e\u3001\u6642\u9593\u304c\u304b\u304b\u308a\u305d\u3046\u3067\u3059<\/ul>\n<h2>\u57fa\u672c\u6587\u6cd5<\/h2>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5927\u6587\u5b57\u30fb\u5c0f\u6587\u5b57\u306f\u533a\u5225\u3055\u308c\u307e\u3059<\/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\">\u30b9\u30c6\u30fc\u30c8\u30e1\u30f3\u30c8\u306f\u3001\u30bb\u30df\u30b3\u30ed\u30f3\u3067\u533a\u5207\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059<\/ul>\n<\/li>\n<\/ul>\n<p>{}\u3092\u7528\u3044\u3066\u30d6\u30ed\u30c3\u30af\u3092\u69cb\u6210\u3057\u307e\u3059\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"nx\">statement_1<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"nx\">statement_2<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"err\">\u22ee<\/span>\r\n  <span class=\"nx\">statement_n<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<ul class=\"post-ul\">\u30d6\u30ed\u30c3\u30af\u306f\u5909\u6570\u306e\u30b9\u30b3\u30fc\u30d7\u3068\u3057\u3066\u6a5f\u80fd\u3057\u3001 let \u307e\u305f\u306f const \u3092\u7528\u3044\u3066\u5909\u6570\u3092\u5ba3\u8a00\u3067\u304d\u307e\u3059\u3002<\/ul>\n<pre class=\"post-pre\"><code><span class=\"p\">{<\/span>\r\n  <span class=\"kd\">let<\/span> <span class=\"nx\">var1<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">text<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u4e0a\u66f8\u304d\u53ef\u80fd<\/span>\r\n  <span class=\"nx\">var1<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">text2<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">var2<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ const\u306e\u5834\u5408\u3001\u518d\u5ba3\u8a00\u306f\u4e0d\u53ef<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u57fa\u672c\u6570\u636e\u7c7b\u578b<\/h2>\n<p>\u5728JavaScript\u4e2d\uff0c\u67097\u79cd\u88ab\u79f0\u4e3a\u539f\u59cb\u7c7b\u578b\u7684\u6807\u91cf\u4ee5\u53ca\u4e00\u4e2a\u79f0\u4e3a\u5bf9\u8c61\u7684\u6570\u636e\u7ed3\u6784\u7c7b\u578b\u3002<br \/>\n\u539f\u59cb\u7c7b\u578b\u5b9e\u9645\u4e0a\u4fdd\u5b58\u4e86\u503c\uff0c\u56e0\u6b64\u8fdb\u884c\u503c\u4f20\u9012\uff0c\u800c\u5bf9\u8c61\u662f\u5f15\u7528\uff0c\u53ea\u80fd\u8fdb\u884c\u5f15\u7528\u4f20\u9012\u3002<\/p>\n<h3>\u57fa\u672c\u539f\u8bed<\/h3>\n<div>\n<div class=\"post-table\">\u30c7\u30fc\u30bf\u578b\u6982\u8981<code>boolean<\/code><code>true<\/code> \u307e\u305f\u306f <code>false<\/code><code>string<\/code>\u6587\u5b57\u5217\u578b<code>number<\/code>\u6574\u6570\u53ca\u3073\u6d6e\u52d5\u5c0f\u6570\u70b9\u6570<\/div>\n<\/div>\n<h3>\u7279\u6b8a\u7684\u539f\u59cb\u7ed3\u6784 (t\u00e8 sh\u016b de j\u00ed<\/h3>\n<div>\n<div class=\"post-table\">\u30c7\u30fc\u30bf\u578b\u6982\u8981<code>null<\/code>null\u5024\u3092\u793a\u3059\u7279\u6b8a\u306a\u30ad\u30fc\u30ef\u30fc\u30c9<code>undefined<\/code>\u5024\u304c\u672a\u5b9a\u7fa9\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059<\/div>\n<\/div>\n<p>undefined \u306f\u4ed6\u306e\u8a00\u8a9e\u306b\u306a\u3044\u6982\u5ff5\u3067\u3001\u305d\u306e\u5b9f\u614b\u306f\u30b0\u30ed\u30fc\u30d0\u30eb\u30b9\u30b3\u30fc\u30d7\u306e\u5909\u66f4\u4e0d\u53ef\u306e\u30d7\u30ed\u30d1\u30c6\u30a3 \u3067\u3059\u3002\u5909\u6570\u306b\u5024\u30fb\u53c2\u7167\u306e\u3044\u305a\u308c\u3082\u4ee3\u5165\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3001\u3082\u3057\u304f\u306f\u95a2\u6570\u304c\u4f55\u3082\u8fd4\u5374\u3057\u306a\u3044\u3053\u3068\u3092\u8868\u3059\u5834\u5408\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<br \/>\n\u610f\u56f3\u7684\u306b\u5909\u6570\u304c\u7a7a\u3067\u3042\u308b\u3053\u3068\u3092\u793a\u3059\u306b\u306f null \u3092\u7528\u3044\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002NodeJS\u3067\u306fnull\u3092\u6e21\u3059\u3053\u3068\u3067\u3001\u30b9\u30c8\u30ea\u30fc\u30e0\u306e\u672b\u7aef\u3092\u793a\u3059\u306a\u3069\u7279\u6b8a\u306a\u5f79\u5272\u3092\u62c5\u3046\u5834\u5408\u3082\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>null \u306f typeof \u6f14\u7b97\u5b50\u3092\u7528\u3044\u308b\u3068\u3001&#8221;object&#8221;\u304c\u8fd4\u3063\u3066\u304f\u308b\u305f\u3081\u3001\u5834\u5408\u308f\u3051\u306b\u306f\u6ce8\u610f\u304c\u5fc5\u8981\u3067\u3059\u3002<\/p>\n<p>\u5728\u8003\u8651\u4e0e\u5176\u5b83\u8bed\u8a00\u7684\u517c\u5bb9\u6027\u65f6\uff0c\u5f88\u591a\u60c5\u51b5\u4e0b\u4f7f\u7528null\u66f4\u597d\u3002\u7136\u800c\uff0c\u5728\u5b9e\u9645\u7684JS\u5b9e\u73b0\u4e2d\uff0c\u5e76\u6ca1\u6709\u592a\u591a\u9700\u8981\u7ec6\u5206\u4f7f\u7528\u8fd9\u4e24\u8005\u7684\u573a\u666f\u3002<\/p>\n<h3>\u6700\u8fd1\u5f15\u5165\u7684\u539f\u59cb\u65b9\u5f0f<\/h3>\n<div>\n<div class=\"post-table\">\u30c7\u30fc\u30bf\u578b\u6982\u8981<code>bigint<\/code>\u81ea\u7531\u7cbe\u5ea6\u6574\u6570\u5024\u3002\u5927\u304d\u306a\u6574\u6570\u3092\u53d6\u308a\u6271\u3046\u305f\u3081\u306b\u7528\u3044\u307e\u3059\u3002ES2020\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<code>symbol<\/code>\u30a4\u30f3\u30b9\u30bf\u30f3\u30b9\u304c\u56fa\u6709\u3067\u4e0d\u5909\u3068\u306a\u308b\u30c7\u30fc\u30bf\u578b\u3002ES2015(ES6)\u3067\u5c0e\u5165\u3055\u308c\u307e\u3057\u305f\u3002<\/div>\n<\/div>\n<p>\u8bf7\u6ce8\u610f\uff0cSymbol\u5728Ruby\u7684Symbol\u7c7b\u4e2d\u4e0e\u5176\u5927\u4e0d\u76f8\u540c\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">Ruby\u3067\u306f\u552f\u4e00\u6027\u304c\u62c5\u4fdd\u3055\u308c\u305fimmutable\u306a\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3067\u300c\u30b7\u30f3\u30dc\u30eb\u304c\u540c\u3058\u3067\u3042\u308c\u3070\u540c\u3058\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d\u3067\u3059\u304c\u3001JS\u3067\u306f\u305d\u306e\u9006\u3067\u300c\u30b7\u30f3\u30dc\u30eb\u304c\u540c\u3058\u3067\u3042\u3063\u3066\u3082\u7d76\u5bfe\u306b\u7570\u306a\u308b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u300d \u3092\u751f\u6210\u3057\u307e\u3059\u3002<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">\u4e3b\u306b\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u30ad\u30fc\u3068\u3057\u3066\u3001\u4ed6\u306e\u3044\u304b\u306a\u308b\u30d7\u30ed\u30d1\u30c6\u30a3\u3068\u3082\u7d76\u5bfe\u306b\u885d\u7a81\u3057\u306a\u3044\u30ad\u30fc\u3092\u8a2d\u5b9a\u3059\u308b\u969b\u306b\u7528\u3044\u3089\u308c\u307e\u3059\u3002<\/ul>\n<h3>\u7269\u4ef6\u7c7b\u578b<\/h3>\n<p>\u51e0\u4e4e\u6240\u6709\u7684 JavaScript \u5bf9\u8c61\u90fd\u662f Object \u6570\u636e\u7c7b\u578b\u7684\u5b9e\u4f8b\u3002<\/p>\n<p>\u4e00\u822c\u5bf9\u8c61\u901a\u5e38\u4eceObject.prototype\u7ee7\u627f\u5c5e\u6027\uff08\u5305\u62ec\u65b9\u6cd5\uff09\uff0c\u4f46\u8fd9\u4e9b\u5c5e\u6027\u53ef\u80fd\u88ab\u9690\u85cf\uff08\u4e5f\u79f0\u4e3a\u8986\u76d6\uff09\u3002<\/p>\n<p>\u5bf9\u8c61\u662f\u5bf9JavaScript\u7ebf\u7a0b\u4e2d\u67d0\u4e9b\u6570\u636e\u7684\u5f15\u7528\uff0c\u4e0e\u539f\u59cb\u7c7b\u578b\u4e0d\u540c\uff0c\u5b83\u4e0d\u76f4\u63a5\u6301\u6709\u6570\u636e\u3002<\/p>\n<h3>\u5904\u7406\u6570\u503c\u7c7b\u578b<\/h3>\n<p>\u5728JavaScript\u4e2d\uff0c\u6ca1\u6709int\u6216float\u8fd9\u6837\u7684\u6982\u5ff5\uff0c\u57fa\u672c\u7684\u6570\u5b57\u7c7b\u578b\u90fd\u662f\u7528Number\u7c7b\u578b\u6765\u8868\u793a\u7684\u3002<br \/>\n\u5b83\u7684\u5b9e\u9645\u8868\u73b0\u5f62\u5f0f\u662fIEEE 754\u53cc\u7cbe\u5ea664\u4f4d\u4e8c\u8fdb\u5236\u683c\u5f0f\uff0c\u4e0eJava\u6216C#\u7684double\u7c7b\u578b\u7c7b\u4f3c\u3002\u5b83\u53ef\u4ee5\u8868\u793a\u5c0f\u6570\u503c\uff0c\u4f46\u5b58\u50a8\u7684\u6570\u5b57\u5927\u5c0f\u548c\u7cbe\u5ea6\u662f\u6709\u9650\u5236\u7684\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">\u5c0f\u6570\u306e\u8a08\u7b97\u3067\u306f\u3001\u7cbe\u5ea6\u306b\u6ce8\u610f<\/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\">\u5927\u578b\u306e\u6574\u6570\u8a08\u7b97\u3067\u306fBigInt\u3092\u7528\u3044\u308b\u3053\u3068\u3092\u691c\u8a0e\u3059\u308b\uff08\u4e92\u63db\u6027\u3084\u578b\u5909\u63db\u306b\u6ce8\u610f\uff09<\/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\">\u6570\u5024\u5909\u63db\u306f\u6b21\u306e\u30eb\u30fc\u30eb\u306b\u57fa\u3065\u304f<\/ul>\n<\/li>\n<\/ul>\n<p>undefined \u306f NaN (\u7279\u6b8a\u306a\u6570\u5024\u5b9a\u6570)\u306b\u306a\u308b<br \/>\nnull \u306f 0 \u306b\u306a\u308b<br \/>\ntrue \u306f 1 \u306b\u3001false \u306f 0 \u306b\u306a\u308b<\/p>\n<p>\u53e6\u5916\uff0c\u5982\u679c\u4f7f\u7528gRPC\u6216\u8005Avro\uff0c\u901a\u5e38\u4f1a\u901a\u8fc7\u5e93\u9690\u5f0f\u6216\u663e\u5f0f\u5730\u8fdb\u884c\u6570\u636e\u8f6c\u6362\u3002<\/p>\n<h3>\u7ed3\u6784\u4f53\u3001\u5143\u7ec4\u3001\u6307\u9488\u7c7b\u578b<\/h3>\n<p>\u76f4\u5230ES2022\u7248\u672c\uff0c\u6ca1\u6709\u50cf\u7ed3\u6784\u4f53\u6216\u5143\u7ec4\u8fd9\u6837\u7684\u4e1c\u897f\uff0c\u4e00\u5207\u90fd\u662f\u5bf9\u8c61\u7c7b\u578b\u3002\u6307\u9488\u7c7b\u578b\u4e5f\u4e0d\u5b58\u5728\u3002<br \/>\n\u8fd9\u4e9b\u60c5\u51b5\u4e5f\u662f\u6709\u539f\u56e0\u7684\uff0c\u5728JavaScript\u5904\u7406\u7cfb\u7edf\u4e2d\uff0c\u51e0\u4e4e\u4e0d\u4f1a\u76f4\u63a5\u4ece\u4ee3\u7801\u8c03\u7528\u64cd\u4f5c\u7cfb\u7edf\u7684API\u3002<\/p>\n<p>\u4e5f\u8bb8\u5728\u4e0d\u4e45\u7684\u5c06\u6765\uff0cRecord\u548cTuple\u8fd9\u4e24\u4e2a\u65b0\u7684\u8907\u5408\u30d7\u30ea\u30df\u30c6\u30a3\u30d6\u578b\u53ef\u80fd\u4f1a\u88ab\u5f15\u5165\uff08\u5728\u7f16\u5199\u672c\u6587\u65f6\uff0c\u5904\u4e8eStage2\u9636\u6bb5\uff09\u3002<br \/>\n\u7531\u4e8e\u662f\u65b0\u7684\u539f\u59cb\u578b\uff0c\u51fa\u4e8e\u517c\u5bb9\u6027\u7684\u8003\u8651\uff0c\u53ef\u80fd\u6700\u597d\u4e0d\u8981\u8fc7\u65e9\u91c7\u7528\u3002<\/p>\n<h3>\u8fd0\u7b97\u7b26\u7684\u91cd\u8f7d<\/h3>\n<p>\u4e0eJava\u3001C#\u548cPython\u4e0d\u540c\uff0cECMAScript\u6ca1\u6709\u8fd0\u7b97\u7b26\u91cd\u8f7d\u529f\u80fd\u3002\u56e0\u6b64\uff0c\u65e0\u6cd5\u5bf9\u67d0\u4e2a\u6570\u636e\u7c7b\u578b\u548c\u6570\u636e\u7c7b\u578b\u4e4b\u95f4\u7684\u52a0\u6cd5\u7b49\u64cd\u4f5c\u8fdb\u884c\u63cf\u8ff0\u3002\u4f8b\u5982\uff0c\u901a\u5e38\u60c5\u51b5\u4e0b\u65e0\u6cd5\u5b9e\u73b0\u5411\u91cf\u4e4b\u95f4\u7684\u52a0\u6cd5\u8868\u8fbe\u5f0f\u3002<\/p>\n<p>\u5982\u679c\u8981\u8fdb\u884c\u8ba1\u7b97\u5904\u7406\uff0c\u8bf7\u8003\u8651\u8fd9\u4e00\u70b9\uff0c\u5e76\u8003\u8651\u4f7f\u7528\u5176\u4ed6\u5904\u7406\u7cfb\u7edf\u3002<\/p>\n<h2>\u5d4c\u5165\u5f0f\u5bf9\u8c61<\/h2>\n<p>\u6240\u8c13\u903b\u8f91\u6570\u636e\u7c7b\u578b\uff0c\u5c06\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7ec4\u5408\u800c\u6210\u7684\u5bf9\u8c61\u6765\u8868\u793a\u3002<\/p>\n<p>\u4e8b\u5148\uff0c\u5728JS\u7684\u8fd0\u884c\u65f6\u73af\u5883\u4e2d\u5b58\u5728\u8bb8\u591a\u5185\u7f6e\u5bf9\u8c61\u3002\u6b64\u5916\uff0c\u5728NodeJS\u73af\u5883\u4e2d\uff0c\u8fd8\u6709\u7531NodeJS\u8fd0\u884c\u65f6\u73af\u5883\u63d0\u4f9b\u7684\u7279\u5b9a\u5185\u7f6e\u7c7b\u578b\u3002<\/p>\n<p>\u4ee5\u4e0b\u53ea\u5217\u4e3e\u4e86\u4e00\u4e9b\u5178\u578b\u7684\u4f8b\u5b50\u3002<\/p>\n<div>\n<div class=\"post-table\">\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u6982\u8981Array\u914d\u5217Object\u30aa\u30d6\u30b8\u30a7\u30af\u30c8Date\u65e5\u4ed8RegExp\u6b63\u898f\u8868\u73feError\u30a8\u30e9\u30fc\u578bSet\u5024\u30b3\u30ec\u30af\u30b7\u30e7\u30f3MapKey-Value\u30b3\u30ec\u30af\u30b7\u30e7\u30f3Math\u6570\u5b66\u8a08\u7b97ArrayBuffer\u30d0\u30a4\u30c8\u914d\u5217(\u64cd\u4f5c\u4e0d\u53ef)TypedArray\u30d0\u30a4\u30ca\u30ea\u30c7\u30fc\u30bf\u30d3\u30e5\u30fcBufferNodeJS\u306b\u304a\u3051\u308b\u30d0\u30a4\u30c8\u914d\u5217Promise\u975e\u540c\u671f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8<\/div>\n<\/div>\n<h3>\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff1a\u7b2c\u4e00\u90e8\u5206<\/h3>\n<p>\u7b80\u5355\u7684\u5b57\u8282\u6570\u7ec4\u53ef\u4ee5\u901a\u8fc7ArrayBuffer\u5728\u5185\u5b58\u4e2d\u8fdb\u884c\u914d\u7f6e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ 8\u30d0\u30a4\u30c8\u306e\u30d0\u30c3\u30d5\u30a1<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">buffer<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayBuffer<\/span><span class=\"p\">(<\/span><span class=\"mi\">8<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u4e00\u4e9b\u5185\u7f6e\u6570\u636e\u7c7b\u578b\u5bf9\u8c61\u5305\u62ecArrayBuffer\uff0c\u5728\u5b58\u50a8\u6570\u636e\u65f6\u76f4\u63a5\u4f7f\u7528\u5185\u5b58\uff0c\u56e0\u6b64\u5b83\u4eec\u662f\u53ef\u4f20\u9012\uff08Transferable\uff09\u7684\u5bf9\u8c61\u3002<br \/>\n\u53ef\u4f20\u9012\u5bf9\u8c61\u53ef\u4ee5\u5feb\u901f\u590d\u5236\u5230\u5176\u4ed6\u4e0a\u4e0b\u6587\uff08\u4f8b\u5982Worker\uff09\u4e2d\u3002<\/p>\n<h3>\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff1a\u7b2c2\u90e8\u5206<\/h3>\n<p>\u5728\u670d\u52a1\u5668\u7aef\u5b9e\u73b0\u4e2d\uff0c\u4f7f\u7528Node.js\u63d0\u4f9b\u7684Buffer\u7c7b\u578b\u3002<\/p>\n<pre class=\"post-pre\"><code>import { Buffer } from 'node:buffer';\r\n<\/code><\/pre>\n<p>Buffer\u578b\u662f\u4e00\u4e2a\u56fa\u5b9a\u957f\u5ea6\u7684\u5b57\u8282\u6570\u7ec4\uff0c\u4e5f\u53ef\u4ee5\u4ece\u5b57\u7b26\u4e32\u6216\u6570\u5b57\u6570\u7ec4\u8f6c\u6362\u800c\u6765\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ 8\u30d0\u30a4\u30c8<\/span>\r\n<span class=\"nx\">Buffer<\/span><span class=\"p\">.<\/span><span class=\"nf\">alloc<\/span><span class=\"p\">(<\/span><span class=\"mi\">8<\/span><span class=\"p\">);<\/span>\r\n<span class=\"c1\">\/\/ &lt;Buffer 00 00 00 00 00 00 00 00&gt;<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u4ed6\u30c7\u30fc\u30bf\u304b\u3089\u306e\u5909\u63db<\/span>\r\n<span class=\"nx\">Buffer<\/span><span class=\"p\">.<\/span><span class=\"k\">from<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">my-text<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span><span class=\"dl\">'<\/span><span class=\"s1\">utf8<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nx\">Buffer<\/span><span class=\"p\">.<\/span><span class=\"k\">from<\/span><span class=\"p\">([<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">64<\/span><span class=\"p\">,<\/span> <span class=\"mi\">255<\/span><span class=\"p\">,<\/span> <span class=\"mi\">256<\/span><span class=\"p\">]);<\/span> <span class=\"c1\">\/\/ &lt;Buffer 01 40 ff 00&gt;<\/span>\r\n<\/code><\/pre>\n<h3>\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\uff1a\u7b2c\u4e09\u90e8\u5206<\/h3>\n<p>\u5728\u6d4f\u89c8\u5668\u6216\u975eNodeJS\u7684\u6267\u884c\u73af\u5883\u4e2d\uff0c\u4e0d\u80fd\u4f7f\u7528Buffer\u3002\u7531\u4e8eArrayBuffer\u7c7b\u578b\u4e0d\u5141\u8bb8\u8fdb\u884c\u5185\u5b58\u64cd\u4f5c\uff0c\u56e0\u6b64\u9700\u8981\u4f7f\u7528\u76f8\u5e94\u7684TypedArray\u7c7b\u578b\u4f5c\u4e3a\u5176\u6570\u636e\u89c6\u56fe\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">buffer<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">ArrayBuffer<\/span><span class=\"p\">(<\/span><span class=\"mi\">8<\/span><span class=\"p\">);<\/span>\r\n<span class=\"c1\">\/\/ 4\u30d0\u30a4\u30c8(long\u578b\u76f8\u5f53)\u3078\u306e\u5909\u63db<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">view<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Int32Array<\/span><span class=\"p\">(<\/span><span class=\"nx\">buffer<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>TypedArray\u63d0\u4f9b\u4e86\u4ee5\u4e0b\u51e0\u79cd\u9009\u9879\u3002<\/p>\n<div>\n<div class=\"post-table\">\u578b\u5024\u306e\u7bc4\u56f2\u30b5\u30a4\u30ba (\u30d0\u30a4\u30c8\u6570)Web IDL\u578bInt8Array-128 \u304b\u3089 1271byteUint8Array0 \u304b\u3089 2551octetUint8ClampedArray0 \u304b\u3089 2551octetInt16Array-32768 \u304b\u3089 327672shortUint16Array0 \u304b\u3089 655352unsigned shortInt32Array-2147483648 \u304b\u3089 21474836474longUint32Array0 \u304b\u3089 42949672954unsigned longFloat32Array-3.4E38 \u304b\u3089 3.4E38 \u304a\u3088\u3073 1.2E-38 \uff08\u6700\u5c0f\u306e\u6b63\u306e\u6570\uff094unrestricted floatFloat64Array-1.8E308 \u304b\u3089 1.8E308 \u304a\u3088\u3073 5E-324 \uff08\u6700\u5c0f\u306e\u6b63\u306e\u6570\uff098unrestricted doubleBigInt64Array-263 to 263 &#8211; 18bigintBigUint64Array0 to 264 &#8211; 18bigint<\/div>\n<\/div>\n<p>\u8bf7\u67e5\u9605MDN\u6587\u6863\uff0c\u4ee5\u4e86\u89e3\u6bcf\u4e2a\u50a8\u5b58\u7684\u7f16\u7801\u65b9\u5f0f\u662f\u5982\u4f55\u8fdb\u884c\u7684\u3002<\/p>\n<ul class=\"post-ul\">\u5024\u306e\u30a8\u30f3\u30b3\u30fc\u30c9\u65b9\u5f0f\u3068\u6b63\u898f\u5316<\/ul>\n<h2>\u6807\u51c6\u8f93\u5165\u8f93\u51fa<\/h2>\n<p>\u4f5c\u4e3a\u5bf9\u5e94\u4e8eprint\u7684\u529f\u80fd\uff0c\u5df2\u7ecf\u51c6\u5907\u4e86console\u5bf9\u8c61\u3002<\/p>\n<pre class=\"post-pre\"><code><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\">Hello, world<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">Error!); \/\/ NodeJS\u306b\u304a\u3044\u3066\u306f\u3001\u6a19\u6e96\u30a8\u30e9\u30fc\u51fa\u529b\r\n<\/span><\/code><\/pre>\n<p>\u6a19\u6e96\u8f38\u5165\u901a\u5e38\u53ea\u80fd\u7528\u65bcNodeJS\u3002\u7531\u65bc\u63cf\u8ff0\u57fa\u65bc\u4f7f\u7528\u4e32\u6d41\uff0c\u56e0\u6b64\u5728\u9019\u88e1\u5ffd\u7565\u3002<\/p>\n<h2>\u7269\u4f53<\/h2>\n<p>\u5927\u591a\u6570\u7684JavaScript\u4ee3\u7801\u662f\u7528\u4e8e\u63cf\u8ff0\u5bf9\u8c61\u64cd\u4f5c\u7684\u3002\u5bf9\u8c61\u662f\u5bf9\u5185\u5b58\u4e2d\u7684\u6570\u636e\u5f15\u7528\u8fdb\u884c\u7ed3\u6784\u5316\u7684\uff0c\u5b83\u662f\u6309\u5f15\u7528\u4f20\u9012\u7684\u3002\u6b64\u5916\uff0c\u5b83\u6ca1\u6709\u6307\u9488\u7684\u6982\u5ff5\u3002<\/p>\n<p>\u5bf9\u8c61\u7531 {} \u58f0\u660e\u3002<br \/>\n\u5373\u4f7f\u5185\u5bb9\u76f8\u540c\uff0c\u5b83\u4eec\u5f15\u7528\u7684\u662f\u4e0d\u540c\u7684\u5185\u5b58\u6570\u636e\uff0c\u56e0\u6b64\u6bd4\u8f83\u8fd0\u7b97\u7b26\u8fd4\u56defalse\u3002<br \/>\n\u901a\u8fc7 . \u6216 [] \u4f7f\u7528\u7d22\u5f15\u8fdb\u884c\u5143\u7d20\u8bbf\u95ee\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">obj1<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">John Smith<\/span><span class=\"dl\">'<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"nx\">cosnt<\/span> <span class=\"nx\">obj2<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">John Smith<\/span><span class=\"dl\">'<\/span> <span class=\"p\">}<\/span>\r\n\r\n<span class=\"nx\">obj1<\/span> <span class=\"o\">===<\/span> <span class=\"nx\">obj2<\/span> <span class=\"c1\">\/\/ false<\/span>\r\n\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj1<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ 'John Smith'<\/span>\r\n<span class=\"nx\">obj2<\/span><span class=\"p\">.<\/span><span class=\"nx\">name<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Kevin mitonic<\/span><span class=\"dl\">'<\/span> <span class=\"c1\">\/\/ const\u5ba3\u8a00\u3067\u3042\u3063\u3066\u3082\u3001\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u5024\u306e\u5165\u308c\u66ff\u3048\u306f\u53ef\u80fd<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj2<\/span><span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">name<\/span><span class=\"dl\">'<\/span><span class=\"p\">])<\/span> <span class=\"c1\">\/\/ Kevin mitonic'<\/span>\r\n<\/code><\/pre>\n<p>\u6570\u7ec4\u53ef\u4ee5\u7528 [] \u8fdb\u884c\u58f0\u660e\u3002<br \/>\n\u901a\u8fc7\u4f7f\u7528\u6570\u5b57\u7d22\u5f15\u6765\u8bbf\u95ee\u5143\u7d20\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">ary<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">john<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">smith<\/span><span class=\"dl\">'<\/span><span class=\"p\">];<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">ary<\/span><span class=\"p\">[<\/span><span class=\"mi\">0<\/span><span class=\"p\">]);<\/span> <span class=\"c1\">\/\/ `john`<\/span>\r\n<\/code><\/pre>\n<p>\u867d\u7136\u53ef\u4ee5\u6df7\u5408\u4f7f\u7528\u4e0d\u540c\u7684\u6570\u636e\u7c7b\u578b\uff0c\u4f46\u7531\u4e8e\u4f7f\u7528\u4e0d\u4fbf\u4e14\u65e0\u6cd5\u63a8\u65ad\u6570\u636e\u7c7b\u578b\uff0c\u56e0\u6b64\u5f88\u5c11\u4f7f\u7528\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">cosnt<\/span> <span class=\"nx\">ary<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">text<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span> <span class=\"p\">,<\/span> <span class=\"kc\">false<\/span><span class=\"p\">]<\/span>\r\n<\/code><\/pre>\n<p>\u5bf9\u8c61\u548c\u6570\u7ec4\u53ef\u4ee5\u7ed3\u5408\u5728\u4e00\u8d77\u5f62\u6210\u590d\u6742\u7684\u7ed3\u6784\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">obj1<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"na\">message<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Hello, world<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">isDisabled<\/span><span class=\"p\">:<\/span> <span class=\"kc\">false<\/span><span class=\"p\">,<\/span>\r\n  <span class=\"na\">profile<\/span><span class=\"p\">:<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"na\">name<\/span><span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">John Smith<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span>\r\n    <span class=\"na\">age<\/span><span class=\"p\">:<\/span> <span class=\"mi\">20<\/span>\r\n  <span class=\"p\">},<\/span>\r\n  <span class=\"na\">tags<\/span><span class=\"p\">:<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">user<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span><span class=\"dl\">'<\/span><span class=\"s1\">member<\/span><span class=\"dl\">'<\/span> <span class=\"p\">]<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>JSON (JavaScript Object Notation)<\/h2>\n<p>\u5bf9\u8c61\u53ef\u4ee5\u88ab\u7f16\u7801\u4e3a\u4e00\u4e2a\u79f0\u4e3aJSON\u7684\u5b57\u7b26\u4e32\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nx\">cosnt<\/span> <span class=\"nx\">str<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">JSON<\/span><span class=\"p\">.<\/span><span class=\"nf\">stringify<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj1<\/span><span class=\"p\">);<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">str<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u8f6c\u6362\u540e\u5c06\u5f97\u5230\u4e0b\u9762\u7684\u6587\u672c\u6570\u636e\u3002<\/p>\n<pre class=\"post-pre\"><code>{\"message\":\"Hello, world\",\"isDisabled\":false,\"profile\":{\"name\":\"John Smith\",\"age\":20},\"tags\":[\"user\",\"member\"]}\r\n<\/code><\/pre>\n<p>\u8981\u5c06\u5b57\u7b26\u4e32\u89e3\u7801\u4e3a\u5bf9\u8c61\uff0c\u5219\u53ef\u4ee5\u4f7f\u7528JSON.parse\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">obj<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">JSON<\/span><span class=\"p\">.<\/span><span class=\"nf\">parse<\/span><span class=\"p\">(<\/span><span class=\"nx\">str<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u6b64\u5916\uff0c\u5c3d\u7ba1JSON\u7684\u63cf\u8ff0\u65b9\u5f0f\u6709\u4e9b\u5197\u957f\uff0c\u4f46\u5176\u89c4\u8303\u975e\u5e38\u4e25\u683c\uff0c\u56e0\u6b64JSON.parse\u7684\u5904\u7406\u901f\u5ea6\u5b9e\u9645\u4e0a\u76f8\u5f53\u5feb\u3002<\/p>\n<h3>\u5c06\u5185\u5d4c\u5bf9\u8c61\u8f6c\u5316\u4e3aJSON\u683c\u5f0f\u3002<\/h3>\n<p>\u9700\u8981\u7279\u522b\u6ce8\u610f\u7684\u662f\uff0c\u5728JSON.stringify\u4e0e\u5d4c\u5165\u7684\u5bf9\u8c61\u4e00\u8d77\u4f7f\u7528\u65f6\u7684\u884c\u4e3a\u3002<br \/>\n\u7f16\u7801\u6210\u4ec0\u4e48\u6837\u7684\u503c\u53d6\u51b3\u4e8e\u8be5\u5d4c\u5165\u7684\u5bf9\u8c61\u3002<\/p>\n<p>\u7531\u4e8e\u65e0\u6cd5\u81ea\u52a8\u5c06\u539f\u59cb\u5185\u7f6e\u5bf9\u8c61\u8f6c\u6362\u4e3a\u89e3\u7801\u7ed3\u679c\uff0c\u56e0\u6b64\u65e0\u6cd5\u5c06JSON.stringify\/JSON.parse\u7528\u4f5c\u76f8\u4e92\u5bf9\u5e94\u7684\u5e8f\u5217\u5316\u5668\u548c\u53cd\u5e8f\u5217\u5316\u5668\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">obj<\/span> <span class=\"o\">=<\/span> <span class=\"p\">{<\/span> <span class=\"na\">date<\/span><span class=\"p\">:<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Date<\/span><span class=\"p\">()<\/span> <span class=\"p\">}<\/span>\r\n<span class=\"c1\">\/\/ { date: 2023-12-03T03:40:29.401Z } \u3067\u3042\u308a\u3001date\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u306fDate\u578b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u304c\u683c\u7d0d\u3055\u308c\u3066\u3044\u308b<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">str<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">JSON<\/span><span class=\"p\">.<\/span><span class=\"nf\">stringify<\/span><span class=\"p\">(<\/span><span class=\"nx\">obj<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">parsedObj<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">JSON<\/span><span class=\"p\">.<\/span><span class=\"nf\">parse<\/span><span class=\"p\">(<\/span><span class=\"nx\">str<\/span><span class=\"p\">);<\/span>\r\n<span class=\"c1\">\/\/ { date: '2023-12-03T03:40:29.401Z' } \u304c\u5f97\u3089\u308c\u308b\u3002date\u30d7\u30ed\u30d1\u30c6\u30a3\u306fstring\u578b\u306b\u306a\u3063\u3066\u3044\u308b\u3002<\/span>\r\n<\/code><\/pre>\n<h3>\u5177\u6709\u5faa\u73af\u5f15\u7528\u7684JavaScript\u5bf9\u8c61<\/h3>\n<p>\u8bf7\u6ce8\u610f\uff0c\u5c1d\u8bd5\u5c06\u5176\u8f6c\u6362\u4e3aJSON\u4f1a\u5bfc\u81f4\u9519\u8bef\uff0c\u56e0\u6b64\u8981\u5c0f\u5fc3\u3002<br \/>\n\u6709\u8bb8\u591a\u5e93\u53ef\u4ee5\u907f\u514d\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\n<ul class=\"post-ul\">\n<li style=\"list-style-type: none;\">\n<ul class=\"post-ul\">https:\/\/www.npmjs.com\/package\/safe-stable-stringify<\/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\">https:\/\/www.npmjs.com\/package\/fast-json-stable-stringify<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<ul class=\"post-ul\">https:\/\/www.npmjs.com\/package\/json-stable-stringify<\/ul>\n<h2>\u8a9e\u6cd5<\/h2>\n<p>Java\u548cC#\u5177\u6709\u76f8\u4f3c\u7684\u8bed\u6cd5\u3002<\/p>\n<h3>\u51fd\u6570<\/h3>\n<p>\u51fd\u6570\u901a\u8fc7 function \u8bed\u53e5\u8fdb\u884c\u58f0\u660e\u3002<br \/>\n\u53ef\u4ee5\u5b9a\u4e49\u591a\u4e2a\u53c2\u6570\uff0c\u5e76\u6307\u5b9a\u9ed8\u8ba4\u53c2\u6570\u7b49\u3002<br \/>\n\u51fd\u6570\u4f53\u662f\u4e00\u4e2a\u4ee3\u7801\u5757\uff0c\u53ef\u4ee5\u5728\u5176\u4e2d\u58f0\u660e\u548c\u4f7f\u7528\u53d8\u91cf\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">myFunc<\/span><span class=\"p\">(<\/span><span class=\"nx\">arg1<\/span><span class=\"p\">,<\/span> <span class=\"nx\">arg2<\/span><span class=\"p\">,<\/span> <span class=\"nx\">arg3<\/span><span class=\"o\">=<\/span><span class=\"dl\">'<\/span><span class=\"s1\">defaultValue<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"c1\">\/\/ \u5909\u6570\u5ba3\u8a00\u306f\u539f\u5247\u3068\u3057\u3066 const (\u5b9a\u6570\u5ba3\u8a00)\u3092\u7528\u3044\u308b<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">var1<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">text<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span> \r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">var2<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">arg2<\/span><span class=\"p\">;<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"nx\">var1<\/span> <span class=\"o\">+<\/span> <span class=\"nx\">var2<\/span><span class=\"p\">;<\/span> <span class=\"c1\">\/\/ \u8fd4\u308a\u5024\u306f<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u53ef\u4ee5\u4f7f\u7528\u7bad\u5934\u7b26\u53f7(=&gt;)\u6765\u8868\u793a\u533f\u540d\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">arrowFunc<\/span> <span class=\"o\">=<\/span> <span class=\"p\">(<\/span><span class=\"nx\">arg<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"nx\">arg<\/span><span class=\"p\">.<\/span><span class=\"nf\">toString<\/span><span class=\"p\">()<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u5c1d\u8bd5-\u6355\u83b7\u8bed\u6cd5<\/h3>\n<pre class=\"post-pre\"><code><span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nf\">otherFunc<\/span><span class=\"p\">();<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">finally<\/span> <span class=\"p\">{<\/span>\r\n  <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\">end<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u6761\u4ef6\u5206\u652f<\/h3>\n<h4>\u5047\u5982\uff0c\u5426\u5247\u5982\u679c\uff0c\u5426\u5247\u69cb\u6587<\/h4>\n<pre class=\"post-pre\"><code><span class=\"k\">if <\/span><span class=\"p\">(<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">test<\/span><span class=\"dl\">'<\/span> <span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <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\">ok<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"k\">else<\/span> <span class=\"k\">if <\/span><span class=\"p\">(<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">not test<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">warn<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">warning!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">else<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">error!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u4e09\u4e2a\u64cd\u4f5c\u7b26<\/h3>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">===<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">test<\/span><span class=\"dl\">'<\/span> <span class=\"p\">?<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">ok<\/span><span class=\"dl\">'<\/span> <span class=\"p\">:<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">error<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<\/code><\/pre>\n<h4>\u5207\u6362\u8bed\u6cd5<\/h4>\n<p>\u8fd9\u770b\u8d77\u6765\u50cfC\u578b\u7684\u5f62\u72b6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">switch <\/span><span class=\"p\">(<\/span><span class=\"nx\">b<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">test<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n    <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\">ok<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"c1\">\/\/ C\u540c\u69d8\u3001\u8907\u6570\u306ecase\u6587\u3092\u91cd\u306d\u308b\u3053\u3068\u304c\u3067\u304d\u308b<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">not test<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n  <span class=\"k\">case<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">not test2<\/span><span class=\"dl\">'<\/span><span class=\"p\">:<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">warn<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">warning!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n    <span class=\"k\">break<\/span><span class=\"p\">;<\/span>\r\n\r\n  <span class=\"nl\">default<\/span><span class=\"p\">:<\/span>\r\n    <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">error!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h3>\u91cd\u590d<\/h3>\n<h4>\u5faa\u73af\u63a7\u5236\u7ed3\u6784<\/h4>\n<p>\u5f88\u50cfC<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">let<\/span> <span class=\"nx\">index<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">0<\/span><span class=\"p\">;<\/span> <span class=\"nx\">index<\/span> <span class=\"o\">&lt;<\/span> <span class=\"nx\">array<\/span><span class=\"p\">.<\/span><span class=\"nx\">length<\/span><span class=\"p\">;<\/span> <span class=\"nx\">index<\/span><span class=\"o\">++<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">element<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">array<\/span><span class=\"p\">[<\/span><span class=\"nx\">index<\/span><span class=\"p\">];<\/span>  \r\n  <span class=\"c1\">\/\/ break\u3084continue\u3082\u5229\u7528\u3067\u304d\u307e\u3059\u3002<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h4>\u5f53\u6587<\/h4>\n<p>\u540c\u65f6\uff0c\u65e2\u53ef\u4ee5\u4f7f\u7528while\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528do-while\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">while <\/span><span class=\"p\">(<\/span><span class=\"nx\">condition<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"cm\">\/** \u30eb\u30fc\u30d7\u51e6\u7406 *\/<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"k\">do<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"cm\">\/** \u30eb\u30fc\u30d7\u51e6\u7406 *\/<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">while <\/span><span class=\"p\">(<\/span><span class=\"nx\">condition<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h3>\u8fed\u4ee3\u5904\u7406<\/h3>\n<p>\u8fd8\u6709\u9488\u5bf9\u6570\u7ec4\u548c\u5bf9\u8c61\u5143\u7d20\u7684\u53ef\u8fed\u4ee3\u5bf9\u8c61\u5217\u4e3e\u5904\u7406\u8bed\u6cd5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u8981\u7d20\u306e\u5217\u6319<\/span>\r\n<span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">const<\/span> <span class=\"nx\">iterator<\/span> <span class=\"k\">of<\/span> <span class=\"nx\">object<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    \r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ \u30ad\u30fc\u306e\u5217\u6319<\/span>\r\n<span class=\"k\">for <\/span><span class=\"p\">(<\/span><span class=\"kd\">const<\/span> <span class=\"nx\">key<\/span> <span class=\"k\">in<\/span> <span class=\"nx\">object<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">element<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">object<\/span><span class=\"p\">[<\/span><span class=\"nx\">key<\/span><span class=\"p\">];<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<h2>\u6587\u5b57\u7684\u5b57\u7b26\u4e32\u64cd\u4f5c<\/h2>\n<h3>\u7bc4\u672c<\/h3>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">username<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">john<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">age<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">20<\/span><span class=\"p\">;<\/span>\r\n\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"s2\">`<\/span><span class=\"p\">${<\/span><span class=\"nx\">username<\/span><span class=\"p\">}<\/span> <span class=\"p\">${<\/span><span class=\"mi\">20<\/span><span class=\"p\">}<\/span><span class=\"s2\">`<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ 'john 20' \u3068\u8868\u793a\u3055\u308c\u308b<\/span>\r\n<\/code><\/pre>\n<h3>\u5207\u5206\u548c\u5408\u4f75<\/h3>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">ary<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">a,b,c<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span><span class=\"nf\">split<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">,<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"kd\">const<\/span> <span class=\"nx\">txt<\/span> <span class=\"o\">=<\/span> <span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">join<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">-<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 'a-b-c'\u3068\u306a\u308b<\/span>\r\n<\/code><\/pre>\n<h3>\u5207\u5272<\/h3>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">str<\/span> <span class=\"o\">=<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">Mozilla<\/span><span class=\"dl\">'<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">str<\/span><span class=\"p\">.<\/span><span class=\"nf\">substring<\/span><span class=\"p\">(<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"mi\">3<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ oz<\/span>\r\n<span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">log<\/span><span class=\"p\">(<\/span><span class=\"nx\">str<\/span><span class=\"p\">.<\/span><span class=\"nf\">substring<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">));<\/span> <span class=\"c1\">\/\/ zilla<\/span>\r\n<\/code><\/pre>\n<h3>\u641c\u7d22<\/h3>\n<pre class=\"post-pre\"><code><span class=\"dl\">'<\/span><span class=\"s1\">abcd<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span><span class=\"nf\">indexOf<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">cd<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 2<\/span>\r\n<span class=\"dl\">'<\/span><span class=\"s1\">abcd<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span><span class=\"nf\">match<\/span><span class=\"p\">(<\/span><span class=\"sr\">\/ABC\/i<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ [ 'abc', index: 0, input: 'abcd', groups: undefined ]<\/span>\r\n<span class=\"dl\">'<\/span><span class=\"s1\">abcd<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span><span class=\"nf\">search<\/span><span class=\"p\">(<\/span><span class=\"sr\">\/cd\/i<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ 2<\/span>\r\n<span class=\"dl\">'<\/span><span class=\"s1\">abcd<\/span><span class=\"dl\">'<\/span><span class=\"p\">.<\/span><span class=\"nf\">includes<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">cd<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ true <\/span>\r\n<\/code><\/pre>\n<h2>\u6570\u7ec4\u64cd\u4f5c<\/h2>\n<p>\u4e00\u822c\u800c\u8a00\uff0c\u5728JavaScript\u4e2d\uff0c\u6570\u7ec4\u7684\u5904\u7406\u901f\u5ea6\u5e76\u4e0d\u5feb\u3002<br \/>\n\u7279\u522b\u662f\u5728\u5904\u7406\u5927\u89c4\u6a21\u6570\u636e\u96c6\u65f6\uff0c\u5176\u5904\u7406\u901f\u5ea6\u5f80\u5f80\u8f83\u6162\u3002\u8bf7\u4ed4\u7ec6\u8003\u8651\u4f7f\u7528\u573a\u666f\u3002<\/p>\n<h3>\u5c06\u5143\u7d20\u6dfb\u52a0\u5230\u6570\u7ec4\u4e2d\u5e76\u5220\u9664\u5143\u7d20\u3002<\/h3>\n<p>\u56e0\u4e3a\u5b83\u662f\u53ef\u53d8\u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u6240\u4ee5\u53ef\u4ee5\u8fdb\u884c\u5143\u7d20\u7684\u6dfb\u52a0\u548c\u63d0\u53d6\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">ary<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">b<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span><span class=\"dl\">'<\/span><span class=\"s1\">c<\/span><span class=\"dl\">'<\/span><span class=\"p\">]<\/span>\r\n<span class=\"c1\">\/\/ \u5148\u982d\u306e\u51e6\u7406<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">unshift<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">a<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ ary =&gt; ['a','b','c']<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">shift<\/span><span class=\"p\">()<\/span> <span class=\"c1\">\/\/ ary =&gt; ['b','c']<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u672b\u5c3e\u306e\u51e6\u7406<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">push<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">d<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span> <span class=\"c1\">\/\/ ary =&gt; ['b','c','d']<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">pop<\/span><span class=\"p\">()<\/span> <span class=\"c1\">\/\/ ary =&gt; ['b','c']<\/span>\r\n<\/code><\/pre>\n<p>\u53e6\u5916\uff0c\u5728\u6570\u7ec4\u64cd\u4f5c\u4e2d\uff0c\u8fd8\u63d0\u4f9b\u4e86\u66f4\u590d\u6742\u7684\u5904\u7406\u65b9\u5f0f splice\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">ary<\/span> <span class=\"o\">=<\/span> <span class=\"p\">[<\/span><span class=\"dl\">'<\/span><span class=\"s1\">\u6708<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\u6c34<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\u6728<\/span><span class=\"dl\">'<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">June<\/span><span class=\"dl\">'<\/span><span class=\"p\">];<\/span>\r\n\r\n<span class=\"c1\">\/\/ index=1 \u306b\u633f\u5165<\/span>\r\n<span class=\"kd\">let<\/span> <span class=\"nx\">index<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">1<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">splice<\/span><span class=\"p\">(<\/span><span class=\"nx\">index<\/span><span class=\"p\">,<\/span> <span class=\"mi\">0<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\u706b<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ ary =&gt; [\"\u6708\", \"\u706b\", \"\u6c34\", \"\u6728\", \"\u571f\"]<\/span>\r\n\r\n<span class=\"c1\">\/\/ index=4\u304b\u3089\u5909\u66f4\uff081\u3064\u524a\u9664\u3057\u3001\u633f\u5165\uff09<\/span>\r\n<span class=\"nx\">index<\/span> <span class=\"o\">=<\/span> <span class=\"mi\">4<\/span><span class=\"p\">;<\/span>\r\n<span class=\"nx\">ary<\/span><span class=\"p\">.<\/span><span class=\"nf\">splice<\/span><span class=\"p\">(<\/span><span class=\"nx\">index<\/span><span class=\"p\">,<\/span> <span class=\"mi\">1<\/span><span class=\"p\">,<\/span> <span class=\"dl\">'<\/span><span class=\"s1\">\u91d1<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ ary =&gt; [\"\u6708\", \"\u706b\", \"\u6c34\", \"\u6728\", \"\u91d1\"]<\/span>\r\n<\/code><\/pre>\n<p>\u5c3d\u7ba1\u4e0d\u662f\u76f4\u63a5\u7684\u53c2\u6570\uff0c\u4f46\u8bf7\u8bb0\u4f4f\u53ef\u4ee5\u4fee\u6539\u4ece\u7b2c\u4e00\u4e2a\u53c2\u6570\u7684\u7b2ci\u4e2a\u5143\u7d20\u5f00\u59cb\u7684\u8981\u7d20\u3002<\/p>\n<h2>\u91cd\u65b0\u751f\u6210\u6216\u5207\u5272\u6570\u7ec4\u3002<\/h2>\n<p>\u6709\u4e00\u4e9b\u64cd\u4f5c\u4e0d\u6d89\u53ca\u5bf9\u6570\u7ec4\u672c\u8eab\u7684\u5904\u7406\uff0c\u800c\u662f\u521b\u5efa\u65b0\u6570\u7ec4\u3002<br \/>\n\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u5373\u4f7f\u662f\u65b0\u6570\u7ec4\uff0c\u5728\u5176\u4e2d\u7684\u5143\u7d20\u662f\u5bf9\u8c61\u65f6\uff0c\u5b83\u4eec\u4ecd\u7136\u5f15\u7528\u76f8\u540c\u7684\u6570\u636e\u3002<\/p>\n<h3>\u91cd\u65b0\u751f\u6210\u5904\u7406<\/h3>\n<p>\u7b5b\u9009<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">filter<\/span><span class=\"p\">(<\/span><span class=\"nx\">n<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"mi\">3<\/span> <span class=\"o\">&lt;<\/span> <span class=\"nx\">n<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ [4,5]<\/span>\r\n<\/code><\/pre>\n<p>\u53d6\u51fa<\/p>\n<pre class=\"post-pre\"><code><span class=\"c1\">\/\/ 2\u756a\u76ee\u306e\u6b21\u306e\u8981\u7d20\u304b\u3089\u3001-1\u756a\u76ee\uff08\u6700\u5f8c\u304b\u30891\u756a\u76ee\u306e\u624b\u524d\uff09\u307e\u3067\u53d6\u308a\u51fa\u3059<\/span>\r\n<span class=\"p\">[<\/span><span class=\"dl\">\"<\/span><span class=\"s2\">\u6708<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">\u706b<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">\u6c34<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">\u6728<\/span><span class=\"dl\">\"<\/span><span class=\"p\">,<\/span> <span class=\"dl\">\"<\/span><span class=\"s2\">\u91d1<\/span><span class=\"dl\">\"<\/span><span class=\"p\">].<\/span><span class=\"nf\">slice<\/span><span class=\"p\">(<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span> <span class=\"o\">-<\/span><span class=\"mi\">1<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ [\"\u6c34\",\"\u6728\"]<\/span>\r\n<\/code><\/pre>\n<p>\u518d\u52a0\u5de5 ji\u0101<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">map<\/span><span class=\"p\">(<\/span><span class=\"nx\">a<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">*<\/span> <span class=\"mi\">2<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ =&gt; [2,4,6,8,10]<\/span>\r\n<\/code><\/pre>\n<p>\u6392\u5e8f<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">sort<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ =&gt; [1,2,3,4,5]<\/span>\r\n\r\n<span class=\"c1\">\/\/ \u4e26\u3073\u66ff\u3048\u306e\u305f\u3081\u306e\u8a55\u4fa1\u5f0f\u3092\u8ffd\u52a0\u3059\u308b\u3002<\/span>\r\n<span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">sort<\/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=\"o\">=&gt;<\/span> <span class=\"nx\">a<\/span> <span class=\"o\">-<\/span> <span class=\"nx\">b<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ =&gt; [1,2,3,4,5]<\/span>\r\n<span class=\"p\">[<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">sort<\/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=\"o\">=&gt;<\/span> <span class=\"nx\">b<\/span> <span class=\"o\">-<\/span> <span class=\"nx\">a<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ =&gt; [5,4,3,2,1]<\/span>\r\n<\/code><\/pre>\n<p>\u7ffb\u8f6c<\/p>\n<pre class=\"post-pre\"><code><span class=\"p\">[<\/span><span class=\"mi\">1<\/span><span class=\"p\">,<\/span><span class=\"mi\">2<\/span><span class=\"p\">,<\/span><span class=\"mi\">3<\/span><span class=\"p\">,<\/span><span class=\"mi\">4<\/span><span class=\"p\">,<\/span><span class=\"mi\">5<\/span><span class=\"p\">].<\/span><span class=\"nf\">reverse<\/span><span class=\"p\">();<\/span> <span class=\"c1\">\/\/ =&gt; [5,4,3,2,1]<\/span>\r\n<\/code><\/pre>\n<h2>\u539f\u578b\u5bfc\u5411<\/h2>\n<p>\u8bf7\u53c2\u8003\u6b64\u5904\u7684\u8be6\u7ec6\u6587\u7ae0\uff0cJavaScript\u91c7\u7528\u4e86\u539f\u578b\u5bfc\u5411\u3002<\/p>\n<p>&nbsp;<\/p>\n<h2>\u8ba1\u65f6\u5668<\/h2>\n<p>\u4ece\u5386\u53f2\u80cc\u666f\u4e0a\u6765\u770b\uff0cJavaScript\u5185\u7f6e\u4e86\u8ba1\u65f6\u5668\u529f\u80fd\u3002<\/p>\n<p>\u7ecf\u5178\u7684\u4f8b\u5b50\u662fsetTimeout\u3002<br \/>\n\u5b83\u4f1a\u5728\u6307\u5b9a\u7684\u6beb\u79d2\u6570\u7b49\u5f85\u540e\u6267\u884c\u4e00\u6b21\u56de\u8c03\u51fd\u6570\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">setTimeout<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <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\">waited!<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"mi\">1000<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>\u8fd8\u6709\u4e00\u79cd\u53ef\u4ee5\u5b9a\u671f\u8fdb\u884c\u56de\u8c03\u8c03\u7528\u7684\u51fd\u6570 setInterval\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">timer<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">setInterval<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <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\">hello!<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">},<\/span> <span class=\"mi\">1000<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<p>setInterval \u662f\u4e00\u65e6\u5b9a\u4e49\u540e\u4e00\u76f4\u4f1a\u6301\u7eed\u6267\u884c\u7684\u51fd\u6570\u3002\u8981\u53d6\u6d88\u5b9a\u65f6\u5668\uff0c\u53ef\u4ee5\u4f7f\u7528 clearInterval\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"nf\">clearInterval<\/span><span class=\"p\">(<\/span><span class=\"nx\">timer<\/span><span class=\"p\">)<\/span>\r\n<\/code><\/pre>\n<p>\u9274\u4e8esetInterval\u51fd\u6570\u5bb9\u6613\u5f15\u53d1\u5185\u5b58\u6cc4\u6f0f\uff0c\u56e0\u6b64\u5728\u4e0d\u660e\u786e\u5220\u9664\u7684\u60c5\u51b5\u4e0b\uff0c\u4f7f\u7528\u8be5\u51fd\u6570\u65f6\u5e94\u8c28\u614e\u5904\u7406\u3002<\/p>\n<h2>\u627f\u8bfa<\/h2>\n<p>Promise\u662f\u4e3a\u4e86\u63cf\u8ff0\u5f02\u6b65\u5904\u7406\uff0c\u5982\u6267\u884c\u5916\u90e8HTTP API\u6216\u78c1\u76d8\u8bbf\u95ee\u800c\u5f15\u5165\u7684\u3002\u5b83\u4e0eC#\u7684Promise\u975e\u5e38\u76f8\u4f3c\uff0c\u800c\u5728Java\u4e2d\uff0cCompletableFuture\u662f\u4e00\u4e2a\u7c7b\u4f3c\u7684\u6982\u5ff5\u3002<\/p>\n<p>\u5728Promise\u4e2d\uff0c\u53ef\u4ee5\u901a\u8fc7then \/ catch \/ finally\u56de\u8c03\u7684\u5f62\u5f0f\u6765\u5b9a\u4e49\u5c06\u6765\u6267\u884c\u7684\u5904\u7406\u64cd\u4f5c\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">myPromise<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Promise<\/span><span class=\"p\">((<\/span><span class=\"nx\">resolve<\/span><span class=\"p\">,<\/span> <span class=\"nx\">reject<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">someHeavyProcess<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nf\">resolve<\/span><span class=\"p\">(<\/span><span class=\"nx\">result<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u5b8c\u4e86\u3057\u305f\u3089\u547c\u3073\u51fa\u3059\u306e\u304cresolve<\/span>\r\n  <span class=\"p\">}<\/span> <span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">reject<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u5931\u6557\u3057\u305f\u3089\u547c\u3073\u51fa\u3059\u306e\u304creject<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">});<\/span>\r\n<span class=\"nx\">myPromise<\/span>\r\n  <span class=\"p\">.<\/span><span class=\"nf\">then<\/span><span class=\"p\">(()<\/span> <span class=\"o\">=&gt;<\/span> <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\">finished<\/span><span class=\"dl\">'<\/span><span class=\"p\">))<\/span> <span class=\"c1\">\/\/ \u5b8c\u4e86\u6642\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/span>\r\n  <span class=\"p\">.<\/span><span class=\"k\">catch<\/span><span class=\"p\">((<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">));<\/span>     <span class=\"c1\">\/\/ \u30a8\u30e9\u30fc\u767a\u751f\u6642\u30b3\u30fc\u30eb\u30d0\u30c3\u30af<\/span>\r\n<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\">ok<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<\/code><\/pre>\n<h3>Promise\u7684\u6267\u884c\u987a\u5e8f<\/h3>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728\u4e0a\u9762\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2aPromise\u5b9e\u4f8bmyPromise\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u8fd9\u4e2a\u5b9e\u4f8b\u7684\u521b\u5efa\u662f\u7acb\u5373\u5b8c\u6210\u7684\uff0c\u5e76\u663e\u793aok\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"list-style-type: none;\">\n<ol>\u5728Promise\u5185\u90e8\u5b9a\u4e49\u7684\u5904\u7406\u4f1a\u5728\u540e\u53f0\u6301\u7eed\u6267\u884c\uff0c\u76f4\u5230\u5b8c\u6210\u6216\u5931\u8d25\uff0c\u5728\u5176\u4e2d\u4e00\u4e2a\u9636\u6bb5\u8c03\u7528resolve\u6216reject\u3002<\/ol>\n<\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n<ol>\u7136\u540e\uff0c\u4e8b\u5148\u6ce8\u518c\u7684then\u6216catch\u56de\u8c03\u51fd\u6570\u4f1a\u88ab\u6267\u884c\u3002<\/ol>\n<p>\u901a\u5e38\uff0c\u7531\u4e8e\u8fd9\u4e9b\u5904\u7406\u671f\u95f4JavaScript\u7684\u672c\u5730\u5904\u7406\u4f1a\u7ee7\u7eed\u8fdb\u884c\uff0c\u56e0\u6b64Promise\u901a\u5e38\u7528\u4e8e\u5f02\u6b65\u5904\u7406\u3002<\/p>\n<h3>\u6562\u4e8e\u7b49\u5f85\u627f\u8bfa<\/h3>\n<p>\u6839\u636e\u60c5\u51b5\uff0c\u6709\u65f6\u5019\u53ef\u80fd\u4f1a\u6545\u610f\u7b49\u5f85Promise\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u4f1a\u4f7f\u7528await\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">const<\/span> <span class=\"nx\">myPromise<\/span> <span class=\"o\">=<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Promise<\/span><span class=\"p\">((<\/span><span class=\"nx\">resolve<\/span><span class=\"p\">,<\/span> <span class=\"nx\">reject<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"kd\">const<\/span> <span class=\"nx\">result<\/span> <span class=\"o\">=<\/span> <span class=\"nf\">someHeavyProcess<\/span><span class=\"p\">();<\/span>\r\n    <span class=\"nf\">resolve<\/span><span class=\"p\">(<\/span><span class=\"nx\">result<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u5b8c\u4e86\u3057\u305f\u3089\u547c\u3073\u51fa\u3059\u306e\u304cresolve<\/span>\r\n  <span class=\"p\">}<\/span> <span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">reject<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">);<\/span> <span class=\"c1\">\/\/ \u5931\u6557\u3057\u305f\u3089\u547c\u3073\u51fa\u3059\u306e\u304creject<\/span>\r\n  <span class=\"p\">}<\/span>\r\n<span class=\"p\">});<\/span>\r\n\r\n<span class=\"k\">try<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"k\">await<\/span> <span class=\"nx\">myPromise<\/span>\r\n  <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\">ok<\/span><span class=\"dl\">'<\/span><span class=\"p\">);<\/span>\r\n<span class=\"p\">}<\/span> <span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span> <span class=\"p\">{<\/span>\r\n  <span class=\"nx\">console<\/span><span class=\"p\">.<\/span><span class=\"nf\">error<\/span><span class=\"p\">(<\/span><span class=\"dl\">'<\/span><span class=\"s1\">failed<\/span><span class=\"dl\">'<\/span><span class=\"p\">)<\/span>\r\n<span class=\"p\">}<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4f7f\u7528&#8221;await&#8221;\u5173\u952e\u8bcd\uff0c\u53ef\u4ee5\u5b9e\u73b0\u7c7b\u4f3c\u666e\u901aJavaScript\u7684\u987a\u5e8f\u7f16\u5199\u3002<br \/>\n\u4f60\u53ef\u80fd\u4f1a\u60f3\uff1a\u201c\u54ce\u5440\uff1f\u4e3a\u4e86\u5f15\u5165Promise\u800c\u4e0d\u9700\u8981\u7b49\u5f85\uff0c\u4e3a\u4ec0\u4e48\u8981\u7528await\uff1f\u8fd9\u4e0d\u662f\u548c\u539f\u672c\u7684\u5199\u6cd5\u4e00\u6837\u5417\uff1f\u201d<\/p>\n<p>\u4f7f\u7528Promise\u80fd\u5927\u5e45\u63d0\u5347\u8bfb\u53d6\u6027\uff0c\u5c24\u5176\u5728\u9700\u8981\u7ec4\u5408\u6267\u884c\u591a\u4e2a\u5f02\u6b65\u51fd\u6570\u7684\u60c5\u51b5\u4e0b\u3002\u4e0b\u4e00\u8282\u5c06\u4e3e\u4f8b\u8bf4\u660e\u3002<\/p>\n<h3>\u5f02\u6b65\u51fd\u6570 async function<\/h3>\n<p>ECMAScript \u89c4\u5b9a\u4e86 `await` \u53ea\u80fd\u5728\u5f02\u6b65\u51fd\u6570\u7684\u5185\u90e8\u4f7f\u7528\uff08\u5c06\u6765\u53ef\u80fd\u4f1a\u66f4\u6539\uff09\u3002<br \/>\n\u53ea\u8981\u4f7f\u7528\u4e86\u4e00\u6b21 `await`\uff0c\u5c31\u4f1a\u5c06\u5305\u542b\u8be5\u90e8\u5206\u7684\u6574\u4e2a\u4ee3\u7801\u5757\u89c6\u4e3a\u5f02\u6b65\u6267\u884c\u3002<br \/>\n\u56e0\u6b64\uff0c\u5b58\u5728\u7528\u4e8e\u5b9a\u4e49\u5f02\u6b65\u51fd\u6570\u7684 `async function` \u8bed\u53e5\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"k\">async<\/span> <span class=\"kd\">function<\/span> <span class=\"nf\">fetch<\/span><span class=\"p\">(){<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">userId<\/span> <span class=\"o\">=<\/span> <span class=\"k\">await<\/span> <span class=\"nf\">getUserIdFromAPI<\/span><span class=\"p\">();<\/span>\r\n  <span class=\"kd\">const<\/span> <span class=\"nx\">data<\/span> <span class=\"o\">=<\/span> <span class=\"k\">await<\/span> <span class=\"nf\">fetchUserDataFromAPI<\/span><span class=\"p\">(<\/span><span class=\"nx\">userId<\/span><span class=\"p\">);<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"nx\">data<\/span><span class=\"p\">;<\/span>\r\n<span class=\"p\">}<\/span>\r\n\r\n<span class=\"nf\">fetch<\/span><span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<p>\u8fd9\u53e5\u8bdd\u4e0e\u4e0b\u9762\u7684\u63cf\u8ff0\u5177\u6709\u76f8\u540c\u7684\u610f\u601d\u3002<\/p>\n<pre class=\"post-pre\"><code><span class=\"kd\">function<\/span> <span class=\"nf\">fetch<\/span><span class=\"p\">(){<\/span>\r\n  <span class=\"k\">return<\/span> <span class=\"k\">new<\/span> <span class=\"nc\">Promise<\/span><span class=\"p\">((<\/span><span class=\"nx\">resolve<\/span><span class=\"p\">,<\/span> <span class=\"nx\">reject<\/span><span class=\"p\">)<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n    <span class=\"nf\">getUserIdFromAPI<\/span><span class=\"p\">()<\/span>\r\n      <span class=\"p\">.<\/span><span class=\"nf\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">userId<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"k\">return<\/span> <span class=\"nf\">fetchUserDataFromAPI<\/span><span class=\"p\">(<\/span><span class=\"nx\">userId<\/span><span class=\"p\">)<\/span>\r\n          <span class=\"p\">.<\/span><span class=\"nf\">then<\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n            <span class=\"nf\">resolve<\/span><span class=\"p\">(<\/span><span class=\"nx\">data<\/span><span class=\"p\">);<\/span>\r\n          <span class=\"p\">})<\/span>\r\n      <span class=\"p\">.<\/span><span class=\"k\">catch<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span> <span class=\"o\">=&gt;<\/span> <span class=\"p\">{<\/span>\r\n        <span class=\"nf\">reject<\/span><span class=\"p\">(<\/span><span class=\"nx\">e<\/span><span class=\"p\">)<\/span>\r\n      <span class=\"p\">})<\/span>\r\n  <span class=\"p\">});<\/span>\r\n<span class=\"p\">}<\/span>\r\n<span class=\"nf\">fetch<\/span><span class=\"p\">();<\/span>\r\n<\/code><\/pre>\n<p>\u901a\u8fc7\u4f7f\u7528await\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5199\u8d77\u6765\u975e\u5e38\u7b80\u5355\u3002<\/p>\n<p>async\u548cawait\u5728\u4f7f\u7528\u4e0a\u6709\u4e00\u4e9b\u5c0f\u6280\u5de7\uff0c\u5c24\u5176\u662f\u5728NodeJS\u4e2d\uff0c\u53ef\u4ee5\u907f\u514d\u56de\u8c03\u5730\u72f1\uff0c\u540c\u65f6\u7f16\u5199\u975e\u963b\u585e\u7684\u4ee3\u7801\u3002\u56e0\u6b64\uff0c\u6211\u4eec\u9700\u8981\u719f\u7ec3\u638c\u63e1\u5b83\u4eec\u7684\u4f7f\u7528\u65b9\u6cd5\u3002<\/p>\n<h2>\u5176\u4ed6\u91cd\u8981\u6982\u5ff5<\/h2>\n<p>\u73b0\u5728\uff0c\u6211\u8ba4\u4e3a\u4f60\u5df2\u7ecf\u5b66\u4e60\u4e86\u57fa\u672c\u7684JavaScript\u8bed\u6cd5\u548c\u6982\u5ff5\u3002\u8bf7\u8be6\u7ec6\u9605\u8bfbMDN\u63d0\u4f9b\u7684JavaScript\u53c2\u8003\u624b\u518c\u4ee5\u83b7\u53d6\u66f4\u591a\u8d44\u6599\u3002<\/p>\n<ul class=\"post-ul\">JavaScript | 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