{"id":30444,"date":"2024-11-25T09:40:58","date_gmt":"2024-11-25T01:40:58","guid":{"rendered":"https:\/\/fwq.ai\/blog\/30444\/"},"modified":"2024-11-25T09:40:58","modified_gmt":"2024-11-25T01:40:58","slug":"%e5%85%b3%e4%ba%8eecma%e7%9a%84%e8%af%a6%e7%bb%86%e4%bb%8b%e7%bb%8d","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/30444\/","title":{"rendered":"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd"},"content":{"rendered":"<p>javascript\u6a21\u5757\u89c4\u8303\u5728\u4efb\u4f55\u4e00\u4e2a\u5927\u578b\u5e94\u7528\u4e2d\u6a21\u5757\u5316\u662f\u5f88\u5e38\u89c1\u7684\uff0c\u4e0e\u4e00\u4e9b\u66f4\u4f20\u7edf\u7684\u7f16\u7a0b\u8bed\u8a00\u4e0d\u540c\u7684\u662f\uff0cjavascript \uff08ecma-262\u7248\u672c\uff09\u8fd8\u4e0d\u652f\u6301\u539f\u751f\u7684\u6a21\u5757\u5316\u3002javascript\u793e\u533a\u505a\u4e86\u5f88\u591a\u52aa\u529b\uff0c\u5728\u73b0\u6709\u7684\u8fd0\u884c\u73af\u5883\u4e2d\uff0c\u5b9e\u73b0&#8221;\u6a21\u5757&#8221;\u7684\u6548\u679c\u3002\u901a\u884c\u7684javascript\u6a21\u5757\u89c4\u8303\u4e3b\u8981\u6709\u4e24\u79cd\uff1acommonjs\u3001amd\u3001umd\u3001cmd\u7b49commonjscommonjs\u89c4\u8303\u662f\u670d\u52a1\u5668\u7aefjavascript\u6a21\u5757\u89c4\u8303\u3002node.js\u7684\u6a21\u5757\u7cfb\u7edf\uff0c\u5c31\u662f\u53c2\u7167commonjs\u89c4\u8303\u5b9e\u73b0\u7684\u3002npm\u4e5f\u9075\u5faa\u4e86commonjs\u5b9a\u4e49\u7684\u5305\u89c4\u8303\uff0c\u4ece\u800c\u5f62\u6210\u4e86\u4e00\u5957\u5b8c\u6574\u7684\u751f\u6001\u7cfb\u7edf\u3002commonjs\u5b9a\u4e49\u7684\u6a21\u5757\u5206\u4e3a:{\u6a21\u5757\u5f15\u7528(require)} {\u6a21\u5757\u5b9a\u4e49(exports)} {\u6a21\u5757\u6807\u8bc6(module)}\u3002require()\u7528\u6765\u5f15\u5165\u5916\u90e8\u6a21\u5757\uff1bexports\u5bf9\u8c61\u7528\u4e8e\u5bfc\u51fa\u5f53\u524d\u6a21\u5757\u7684\u65b9\u6cd5\u6216\u53d8\u91cf\uff0c\u552f\u4e00\u7684\u5bfc\u51fa\u53e3\uff1bmodule<\/p>\n<p><span style=\"line-height: 1.76em\">1. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/001\/506\/dcb8d454ea2cc5eecc09a18a04fc36d2.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1aJavaScript\u6a21\u5757\u89c4\u8303\u5728\u4efb\u4f55\u4e00\u4e2a\u5927\u578b\u5e94\u7528\u4e2d\u6a21\u5757\u5316\u662f\u5f88\u5e38\u89c1\u7684\uff0c\u4e0e\u4e00\u4e9b\u66f4\u4f20\u7edf\u7684\u7f16\u7a0b\u8bed\u8a00\u4e0d\u540c\u7684\u662f\uff0cJavaScript\uff08ECMA-262\u7248\u672c\uff09\u8fd8\u4e0d\u652f\u6301\u539f\u751f\u7684\u6a21\u5757\u5316\u3002Javascript\u793e\u533a\u505a\u4e86\u5f88&#8230;<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">2. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/008\/3dcbe420375bd3d595c186fb7df59e36.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe1\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe1\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u9996\u5148\u5148\u4ecb\u7ecd\u5982\u4e0b\u7684\u51e0\u79cd\u65b9\u6cd5\uff1a &nbsp;\u5b57\u7b26\u4e32\u65b9\u6cd5: &nbsp;str.length str.charAt(i):\u53d6\u5b57\u7b26\u4e32\u4e2d\u7684\u67d0\u4e00\u4e2a; &nbsp; str.indexOf(&#8216;e&#8217;);\u627e\u7b2c\u4e00\u4e2a\u51fa\u73b0\u7684\u4f4d\u7f6e;\u627e\u4e0d\u5230\u8fd4\u56de-1; &nbsp; str.lastIndexOf(&#8216;e&#8217;):\u627e\u6700\u540e\u4e00\u4e2ae\u51fa\u73b0\u7684\u4f4d\u7f6e;\u627e\u4e0d\u5230\u8fd4\u56de-1;<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">3. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/194\/c478962f2c995803cb3d28fca67db331.png\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe2\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe2\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1aJSON(Javascript Object Notation) \u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6570\u636e\u4ea4\u6362\u683c\u5f0f\u3002\u6613\u4e8e\u4eba\u9605\u8bfb\u548c\u7f16\u5199\u3002\u540c\u65f6\u4e5f\u6613\u4e8e\u673a\u5668\u89e3\u6790\u548c\u751f\u6210\u3002\u5b83\u57fa\u4e8eJavascript Programming Language, Standard ECMA262 3rd Edition &nbsp;December 1999\u7684\u4e00\u4e2a\u5b50\u96c6\u3002JSON\u91c7\u7528\u5b8c\u5168\u72ec\u7acb\u4e8e\u8bed\u8a00\u7684\u6587\u672c\u683c\u5f0f\uff0c\u4f46\u662f\u4e5f\u4f7f\u7528\u4e86\u7c7b\u4f3c\u4e8eC\u8bed\u8a00\u5bb6\u65cf\u7684\u4e60\u60ef\uff08\u5305\u62ecC,&#8230;<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">4. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/001\/506\/99e36bc2d8f88bd546a0681c59345126.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe3\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe3\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u672c\u7bc7\u6587\u7ae0\u4e3b\u8981\u4ecb\u7ecd\u4e86\u8be6\u89e3ECMAScript6\u5165\u95e8&#8211;Class\u5bf9\u8c61\uff0c\u5c0f\u7f16\u89c9\u5f97\u633a\u4e0d\u9519\u7684\uff0c\u73b0\u5728\u5206\u4eab\u7ed9\u5927\u5bb6\uff0c\u4e5f\u7ed9\u5927\u5bb6\u505a\u4e2a\u53c2\u8003\u3002\u4e00\u8d77\u8ddf\u968f\u5c0f\u7f16\u8fc7\u6765\u770b\u770b\u5427<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">5. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/006\/ca3aca2da6b9fd71e4be1d757ff1c895.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe4\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe4\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1aJavaScript\u662f\u6309\u7167ECMAScript\u6807\u51c6\u8bbe\u8ba1\u548c\u5b9e\u73b0\u7684\uff0c\u540e\u6587\u8bf4\u7684JavaScript\u8bed\u6cd5\u5176\u5b9e\u662fES5\u7684\u6807\u51c6\u7684\u5b9e\u73b0\u3002\u5148\u8bf4\u8bf4\u6709\u54ea\u4e9b\u57fa\u7840\u8bed\u6cd5\uff1f\u6700\u57fa\u7840\u8bed\u6cd5\u6709\u54ea\u4e9b\uff1f\u57fa\u7840\u8bed\u6cd5\u51e0\u4e4e\u6240\u6709\u7684\u8bed\u8a00\u5dee\u5f02&#8230;<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">6. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/164\/c25cdbb2049d57f8f91b3d9894a67e96.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe5\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe5\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1aFlv.js \u662f HTML5 Flash \u89c6\u9891\uff08FLV\uff09\u64ad\u653e\u5668\uff0c\u7eaf\u539f\u751f JavaScript \u5f00\u53d1\uff0c\u6ca1\u6709\u7528\u5230 Flash\u3002\u7531 bilibili \u7f51\u7ad9\u5f00\u6e90\u3002\u4e00\u4e2a\u5b9e\u73b0\u4e86\u5728 HTML5 \u89c6\u9891\u4e2d\u64ad\u653e FLV \u683c\u5f0f\u89c6\u9891\u7684 JavaScript \u5e93\u3002\u5b83\u7684\u5de5\u4f5c\u539f\u7406\u662f\u5c06 FLV \u6587\u4ef6\u6d41\u8f6c\u7801\u590d\u7528\u6210 ISO BMFF\uff08MP4 \u788e\u7247\uff09\u7247\u6bb5\uff0c\u7136\u540e\u901a\u8fc7 Media Source Extensions \u5c06 MP4 \u7247\u6bb5\u5582\u8fdb\u6d4f\u89c8\u5668\u3002flv.js \u662f\u4f7f\u7528 ECMAScript 6 \u7f16\u5199\u7684\uff0c\u7136\u540e\u901a\u8fc7 Babel Compiler<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">7. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/006\/e963cc1191f2a74fe0a1c737ff99a0f6.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe6\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe6\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u524d\u9762\u7684\u8bdd\u903b\u8f91\u8fd0\u7b97\u7b26\u5bf9\u64cd\u4f5c\u6570\u8fdb\u884c\u5e03\u5c14\u8fd0\u7b97\uff0c\u7ecf\u5e38\u548c\u5173\u7cfb\u8fd0\u7b97\u7b26\u4e00\u6837\u914d\u5408\u4f7f\u7528\u3002\u903b\u8f91\u8fd0\u7b97\u7b26\u5c06\u591a\u4e2a\u5173\u7cfb\u8868\u8fbe\u5f0f\u7ec4\u5408\u8d77\u6765\u7ec4\u6210\u4e00\u4e2a\u66f4\u590d\u6742\u7684\u8868\u8fbe\u5f0f\u3002\u903b\u8f91\u8fd0\u7b97\u7b26\u5206\u4e3a\u903b\u8f91\u975e&#8217;!&#8217;\u3001\u903b\u8f91\u4e0e&#8217;&amp;&amp;&#8217;\u3001\u903b\u8f91\u6216&#8217;||&#8217;3\u79cd\uff0c\u672c\u6587\u5c06\u4ecb\u7ecd\u8fd9\u4e09\u79cd\u903b\u8f91\u8fd0\u7b97\u7b26\u903b\u8f91\u975e\u903b\u8f91\u975e\u64cd\u4f5c\u7b26\u7531\u4e00\u4e2a\u53f9\u53f7(!)\u8868\u793a\uff0c\u53ef\u4ee5\u5e94\u7528\u4e8eECMAScript\u4e2d<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">8. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/006\/4f558a44ea99a3fac5d64d006496a7aa.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe7\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe7\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u5c31\u662f\u8fd9\u79cd\u76f2\u76ee\u65e0\u539f\u7406\u4f9d\u636e\u7684\u7814\u7a76\u6d4b\u8bd5\u5f04\u6655\u4e86\u6211, \u6709\u5fc5\u8981\u8fd9\u4e48\u505a\u5417; \u5176\u5b9e\u7406\u89e3\u4e86\u539f\u7406\u5c31\u6ca1\u5fc5\u8981\u641e\u8fd9\u4e48\u591a\u4e00\u4e2a\u4e00\u4e2a\u7684\u8bd5, \u7136\u540e\u5f97\u51fa\u89c4\u5f8b, ECMAScript\u89c4\u5219\u90fd\u5df2\u7ecf\u5b9a\u4e49\u597d\u4e86.var\u7684\u89c4\u5219\u662f: \u4f7f\u7528var\u58f0\u660e\u53d8\u91cf\u5c31\u662f\u5185\u90e8\u53d8\u91cf, \u5426\u5219\u5c31\u662f\u5148\u8c03\u7528\u5168\u5c40\u53d8\u91cf, \u4e0d\u7ba1\u591a\u5c11\u5c42\u51fd\u6570.this\u7684\u89c4\u5219\u662f: method\u51fd\u6570\u91cc\u7684th<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">9. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/194\/c5d786f8cd7cd5871b642cee0dcd0669.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe8\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe8\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u5386\u53f2\u4e0a\uff0cJavaScript\u65e0\u6cd5\u5904\u7406\u4e8c\u8fdb\u5236\u6570\u636e\u3002\u5982\u679c\u4e00\u5b9a\u8981\u5904\u7406\u7684\u8bdd\uff0c\u53ea\u80fd\u4f7f\u7528charCodeAt()\u65b9\u6cd5\uff0c\u4e00\u4e2a\u4e2a\u5b57\u8282\u5730\u4ece\u6587\u5b57\u7f16\u7801\u8f6c\u6210\u4e8c\u8fdb\u5236\u6570\u636e\uff0c\u8fd8\u6709\u4e00\u79cd\u529e\u6cd5\u662f\u5c06\u4e8c\u8fdb\u5236\u6570\u636e\u8f6c\u6210Base64\u7f16\u7801\uff0c\u518d\u8fdb\u884c\u5904\u7406\u3002\u8fd9\u4e24\u79cd\u65b9\u6cd5\u4e0d\u4ec5\u901f\u5ea6\u6162\uff0c\u800c\u4e14\u5bb9\u6613\u51fa\u9519\u3002ECMAScript5\u5f15\u5165\u4e86Blob\u5bf9\u8c61\uff0c\u5141\u8bb8\u76f4\u63a5\u64cd\u4f5c\u4e8c\u8fdb\u5236\u6570\u636e\u3002<\/span><\/p>\n<p><span style=\"line-height: 1.76em\">10. <\/span><\/p>\n<p><span style=\"line-height: 1.76em\"><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/000\/000\/006\/fa72eb7758b994982e0696596fbf3f93.jpg\" style=\"max-width:90%\" class=\"aligncenter\" title=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe9\" alt=\"\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u63d2\u56fe9\" \/><\/span><\/p>\n<p><span style=\"line-height: 1.76em\">\u7b80\u4ecb\uff1a\u6b63\u5219\u8868\u8fbe\u5f0f(regular expression)\u63cf\u8ff0\u4e86\u4e00\u79cd\u5b57\u7b26\u4e32\u5339\u914d\u7684\u6a21\u5f0f\uff0c\u53ef\u4ee5\u7528\u6765\u68c0\u67e5\u4e00\u4e2a\u4e32\u662f\u5426\u542b\u6709\u67d0\u79cd\u5b50\u4e32\u3001\u5c06\u5339\u914d\u7684\u5b50\u4e32\u505a\u66ff\u6362\u6216\u8005\u4ece\u67d0\u4e2a\u4e32\u4e2d\u53d6\u51fa\u7b26\u5408\u67d0\u4e2a\u6761\u4ef6\u7684\u5b50\u4e32\u7b49\u3002var validateRegExp = {decmal: &#8220;^([+-]?)\\d*\\.\\d+$&#8221;,\/\/ \u6d6e\u70b9\u6570decmal1: &#8220;^[1-9]\\d*.\\d*|0.\\d*[1-9]\\d*<\/span><\/p>\n<p><strong>\u3010\u76f8\u5173\u95ee\u7b54\u63a8\u8350\u3011\uff1a<\/strong><\/p>\n<\/p>\n<\/p>\n<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5173\u4e8eecma\u7684\u8be6\u7ec6\u4ecb\u7ecd\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>javascript\u6a21\u5757\u89c4\u8303\u5728\u4efb\u4f55\u4e00\u4e2a\u5927\u578b\u5e94\u7528\u4e2d\u6a21\u5757\u5316\u662f\u5f88\u5e38\u89c1\u7684\uff0c\u4e0e\u4e00\u4e9b\u66f4\u4f20\u7edf\u7684\u7f16\u7a0b\u8bed\u8a00\u4e0d\u540c\u7684\u662f\uff0cjavascript 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