{"id":165807,"date":"2024-05-08T15:23:55","date_gmt":"2024-05-08T07:23:55","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/165807.html"},"modified":"2024-05-08T15:24:00","modified_gmt":"2024-05-08T07:24:00","slug":"javascript%e4%b8%ad%e4%ba%8b%e4%bb%b6%e8%ae%a2%e9%98%85%e5%92%8c%e5%8f%91%e5%b8%83%e6%98%af%e4%bb%80%e4%b9%88%e6%84%8f%e6%80%9d","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/165807.html","title":{"rendered":"javascript\u4e2d\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u662f\u4ec0\u4e48\u610f\u601d"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/26232820\/696ba332-1ea6-4b34-9991-ce44452fe61a.webp\" alt=\"javascript\u4e2d\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u662f\u4ec0\u4e48\u610f\u601d\" \/><\/p>\n<p><p>\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u5728JavaScript\u4e2d\u662f\u4e00\u79cd\u8bbe\u8ba1\u6a21\u5f0f\uff0c<strong>\u7528\u4e8e\u5b9e\u73b0\u7ec4\u4ef6\u4e4b\u95f4\u7684\u677e\u6563\u8026\u5408<\/strong>\u3002\u8fd9\u79cd\u6a21\u5f0f\u5141\u8bb8\u4e00\u4e2a\u7ec4\u4ef6\uff08\u53d1\u5e03\u8005\uff09\u53d1\u5e03\u4e8b\u4ef6\uff0c\u800c\u5176\u4ed6\u591a\u4e2a\u7ec4\u4ef6\uff08\u8ba2\u9605\u8005\uff09\u76d1\u542c\u5e76\u54cd\u5e94\u8fd9\u4e9b\u4e8b\u4ef6\uff0c\u800c\u65e0\u9700\u53d1\u5e03\u8005\u4e86\u89e3\u54ea\u4e9b\u8ba2\u9605\u8005\u4f1a\u54cd\u5e94\u3002\u8fd9\u79cd\u65b9\u5f0f<strong>\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u7075\u6d3b\u6027\u548c\u53ef\u7ef4\u62a4\u6027<\/strong>\u3002\u5728\u590d\u6742\u7684\u5e94\u7528\u4e2d\u5c24\u4e3a\u91cd\u8981\uff0c\u56e0\u4e3a\u5b83\u5e2e\u52a9\u5f00\u53d1\u8005\u5c06\u5e94\u7528\u62c6\u5206\u4e3a\u72ec\u7acb\u6613\u7ba1\u7406\u7684\u90e8\u5206\u3002\u5728\u8fd9\u4e4b\u4e2d\uff0c\u4e8b\u4ef6\u7684\u53d1\u5e03\u4e0e\u8ba2\u9605\u901a\u8fc7\u4e00\u4e2a\u4e2d\u4ecb\uff08\u901a\u5e38\u662f\u4e8b\u4ef6\u8c03\u5ea6\u4e2d\u5fc3\u6216\u8005\u4e8b\u4ef6\u603b\u7ebf\uff09\u6765\u534f\u8c03\uff0c\u8fd9\u6837\uff0c\u4efb\u4f55\u65f6\u523b\u5f53\u67d0\u4ef6\u4e8b\u60c5\u53d1\u751f\u65f6\uff0c\u53d1\u5e03\u8005\u53ea\u9700\u5c06\u4e8b\u4ef6\u53d1\u5e03\u5230\u4e2d\u4ecb\u4e0a\uff0c\u800c\u6240\u6709\u5bf9\u6b64\u4e8b\u4ef6\u611f\u5174\u8da3\u7684\u8ba2\u9605\u8005\u90fd\u4f1a\u4ece\u4e2d\u4ecb\u5904\u63a5\u6536\u5230\u901a\u77e5\u5e76\u76f8\u5e94\u5730\u4f5c\u51fa\u53cd\u5e94\u3002<\/p>\n<\/p>\n<p><h3>\u4e00\u3001\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u6a21\u5f0f\u7684\u5de5\u4f5c\u539f\u7406<\/h3>\n<\/p>\n<p><p>\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u6a21\u5f0f\u80cc\u540e\u7684\u4e3b\u8981\u601d\u60f3\u662f\uff0c\u4e00\u4e2a\u6216\u591a\u4e2a\u8ba2\u9605\u8005\u5bf9\u67d0\u4e2a\u4e3b\u9898\u6216\u4e8b\u4ef6\u8868\u8fbe\u5174\u8da3\uff0c\u5f53\u90a3\u4e2a\u4e3b\u9898\u6216\u4e8b\u4ef6\u7684\u72b6\u6001\u53d1\u751f\u53d8\u5316\u65f6\uff0c\u6240\u6709\u8ba2\u9605\u8be5\u4e8b\u4ef6\u7684\u8ba2\u9605\u8005\u90fd\u4f1a\u6536\u5230\u901a\u77e5\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u5206\u4e3a\u4e24\u4e2a\u4e3b\u8981\u6b65\u9aa4\uff1a\u8ba2\u9605\u4e8b\u4ef6\u548c\u53d1\u5e03\u4e8b\u4ef6\u3002<\/p>\n<\/p>\n<p><p>\u9996\u5148\uff0c\u8ba2\u9605\u8005\u9700\u8981\u5411\u4e00\u4e2a\u4e2d\u5fc3\u6ce8\u518c\uff0c\u8868\u660e\u5b83\u5bf9\u67d0\u4e00\u4e2a\u6216\u591a\u4e2a\u4e8b\u4ef6\u7684\u5174\u8da3\u3002\u8fd9\u4e2a\u4e2d\u5fc3\u4fdd\u6301\u7740\u4e8b\u4ef6\u548c\u8ba2\u9605\u8005\u4e4b\u95f4\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u786e\u4fdd\u5728\u9002\u5f53\u7684\u65f6\u95f4\u5c06\u4e8b\u4ef6\u901a\u77e5\u5230\u5408\u9002\u7684\u8ba2\u9605\u8005\u624b\u4e2d\u3002<\/p>\n<\/p>\n<p><p>\u63a5\u4e0b\u6765\uff0c\u5f53\u67d0\u4e2a\u4e8b\u4ef6\u53d1\u751f\u65f6\uff0c\u53d1\u5e03\u8005\u5c06\u8fd9\u4e2a\u4e8b\u4ef6\u53d1\u5e03\u5230\u4e2d\u5fc3\uff0c\u4e2d\u5fc3\u518d\u6839\u636e\u4e4b\u524d\u5efa\u7acb\u7684\u6620\u5c04\u5173\u7cfb\uff0c\u5c06\u4e8b\u4ef6\u901a\u77e5\u7ed9\u6240\u6709\u5bf9\u6b64\u611f\u5174\u8da3\u7684\u8ba2\u9605\u8005\u3002\u8ba2\u9605\u8005\u6536\u5230\u4e8b\u4ef6\u901a\u77e5\u540e\uff0c\u6267\u884c\u76f8\u5e94\u7684\u54cd\u5e94\u51fd\u6570\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u5728JavaScript\u4e2d\u5b9e\u73b0\u4e8b\u4ef6\u8ba2\u9605\/\u53d1\u5e03<\/h3>\n<\/p>\n<p><p>\u5728JavaScript\u4e2d\u5b9e\u73b0\u4e8b\u4ef6\u7684\u8ba2\u9605\u548c\u53d1\u5e03\u53ef\u4ee5\u901a\u8fc7\u7b80\u5355\u7684EventEmitter\u7c7b\u6216\u4f7f\u7528\u66f4\u9ad8\u7ea7\u7684\u5e93\u6765\u5b8c\u6210\u3002\u8fd9\u91cc\uff0c\u6211\u4eec\u9996\u5148\u4ecb\u7ecd\u4e00\u4e2a\u7b80\u5355\u7684EventEmitter\u7684\u5b9e\u73b0\u65b9\u5f0f\u3002<\/p>\n<\/p>\n<p><p>\u4e00\u4e2a\u57fa\u7840\u7684EventEmitter\u7c7b\u9700\u8981\u5305\u542b\u4e09\u4e2a\u57fa\u7840\u65b9\u6cd5\uff1a<code>on<\/code>\uff08\u7528\u4e8e\u8ba2\u9605\u4e8b\u4ef6\uff09\u3001<code>emit<\/code>\uff08\u7528\u4e8e\u53d1\u5e03\u4e8b\u4ef6\uff09\u3001<code>off<\/code>\uff08\u7528\u4e8e\u79fb\u9664\u4e8b\u4ef6\u76d1\u542c\uff09\u3002\u901a\u8fc7\u8fd9\u4e2a\u7c7b\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u4e8b\u4ef6\u4e2d\u5fc3\uff0c\u5141\u8bb8\u5176\u4ed6\u7ec4\u4ef6\u901a\u8fc7<code>on<\/code>\u65b9\u6cd5\u6ce8\u518c\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5e76\u5728\u9002\u5f53\u7684\u65f6\u5019\u901a\u8fc7<code>emit<\/code>\u65b9\u6cd5\u89e6\u53d1\u4e8b\u4ef6\u3002<\/p>\n<\/p>\n<p><p>\u4f8b\u5982\uff0c\u521b\u5efa\u4e00\u4e2aEventEmitter\u7684\u5b9e\u73b0\u53ef\u80fd\u5305\u542b\u5982\u4e0bJavaScript\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<p><pre><code class=\"language-javascript\">class EventEmitter {<\/p>\n<p>  constructor() {<\/p>\n<p>    this.events = {};<\/p>\n<p>  }<\/p>\n<p>  on(event, listener) {<\/p>\n<p>    if (!this.events[event]) {<\/p>\n<p>      this.events[event] = [];<\/p>\n<p>    }<\/p>\n<p>    this.events[event].push(listener);<\/p>\n<p>  }<\/p>\n<p>  emit(event, ...args) {<\/p>\n<p>    if (this.events[event]) {<\/p>\n<p>      this.events[event].forEach(listener =&gt; listener(...args));<\/p>\n<p>    }<\/p>\n<p>  }<\/p>\n<p>  off(event, listener) {<\/p>\n<p>    if (this.events[event]) {<\/p>\n<p>      const index = this.events[event].indexOf(listener);<\/p>\n<p>      if (index !== -1) {<\/p>\n<p>        this.events[event].splice(index, 1);<\/p>\n<p>      }<\/p>\n<p>    }<\/p>\n<p>  }<\/p>\n<p>}<\/p>\n<p><\/code><\/pre>\n<\/p>\n<p><p>\u4f7f\u7528\u4e0a\u8ff0EventEmitter\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5b9a\u4e49\u4e8b\u4ef6\uff0c\u6ce8\u518c\u76d1\u542c\u5668\uff0c\u89e6\u53d1\u4e8b\u4ef6\uff0c\u4ece\u800c\u5b9e\u73b0\u7ec4\u4ef6\u4e4b\u95f4\u7684\u901a\u4fe1\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u4e8b\u4ef6\u8ba2\u9605\/\u53d1\u5e03\u6a21\u5f0f\u7684\u4f18\u52bf<\/h3>\n<\/p>\n<p><p>\u4e8b\u4ef6\u8ba2\u9605\/\u53d1\u5e03\u6a21\u5f0f\u63d0\u4f9b\u4e86\u4e00\u79cd\u9ad8\u6548\u7684\u65b9\u6cd5\u6765\u5904\u7406\u4e0d\u540c\u7ec4\u4ef6\u95f4\u7684\u901a\u4fe1\u95ee\u9898\uff0c\u540c\u65f6\u62e5\u6709\u591a\u4e2a\u4f18\u52bf\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>\u63d0\u9ad8\u4e86\u7cfb\u7edf\u7684\u7075\u6d3b\u6027<\/strong>\uff1a\u7ec4\u4ef6\u4e4b\u95f4\u4e0d\u518d\u76f4\u63a5\u901a\u4fe1\uff0c\u800c\u662f\u901a\u8fc7\u8ba2\u9605\/\u53d1\u5e03\u6a21\u5f0f\u8fdb\u884c\uff0c\u8fd9\u964d\u4f4e\u4e86\u7ec4\u4ef6\u95f4\u7684\u8026\u5408\u5ea6\u3002<\/li>\n<li><strong>\u589e\u5f3a\u4e86\u7cfb\u7edf\u7684\u53ef\u6269\u5c55\u6027<\/strong>\uff1a\u65b0\u7684\u8ba2\u9605\u8005\u53ef\u4ee5\u968f\u65f6\u52a0\u5165\u4e8b\u4ef6\u901a\u4fe1\u94fe\uff0c\u800c\u4e0d\u9700\u8981\u4fee\u6539\u73b0\u6709\u4ee3\u7801\u3002<\/li>\n<li><strong>\u7b80\u5316\u4e86\u7ec4\u4ef6\u95f4\u7684\u4f9d\u8d56\u5173\u7cfb<\/strong>\uff1a\u901a\u8fc7\u4e2d\u4ecb\u7684\u8bbe\u8ba1\uff0c\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u6dfb\u52a0\u6216\u79fb\u9664\u4e8b\u4ef6\u7684\u8ba2\u9605\u8005\uff0c\u4f7f\u5f97\u7ec4\u4ef6\u4e4b\u95f4\u7684\u5173\u7cfb\u66f4\u52a0\u6e05\u6670\u3002<\/li>\n<li><strong>\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027<\/strong>\uff1a\u7ec4\u4ef6\u4e4b\u95f4\u7684\u677e\u6563\u8026\u5408\u786e\u4fdd\u4e86\u66f4\u9ad8\u7684\u53ef\u7ef4\u62a4\u6027\uff0c\u56e0\u4e3a\u4efb\u4f55\u65f6\u5019\u66f4\u6539\u4e00\u4e2a\u7ec4\u4ef6\u7684\u884c\u4e3a\u90fd\u4e0d\u4f1a\u5bf9\u5176\u4ed6\u7ec4\u4ef6\u9020\u6210\u592a\u5927\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<p><h3>\u56db\u3001\u65f6\u673a\u548c\u573a\u666f<\/h3>\n<\/p>\n<p><p>\u4e8b\u4ef6\u8ba2\u9605\/\u53d1\u5e03\u6a21\u5f0f\u4e0d\u662f\u4e07\u80fd\u94a5\u5319\uff0c\u5b83\u9002\u7528\u4e8e\u67d0\u4e9b\u7279\u5b9a\u7684\u573a\u666f\uff0c\u4f8b\u5982\uff1a<\/p>\n<\/p>\n<ul>\n<li><strong>\u5f53\u5e94\u7528\u4e2d\u5b58\u5728\u591a\u4e2a\u4e92\u76f8\u72ec\u7acb\u7684\u7ec4\u4ef6\u9700\u8981\u76f8\u4e92\u901a\u4fe1\u65f6<\/strong>\uff1a\u5728\u590d\u6742\u7684\u524d\u7aef\u5e94\u7528\u4f8b\u5982SPA\uff08\u5355\u9875\u5e94\u7528\uff09\u4e2d\uff0c\u7ec4\u4ef6\u4e4b\u95f4\u7684\u901a\u4fe1\u662f\u4e00\u4e2a\u5e38\u89c1\u7684\u9700\u6c42\u3002<\/li>\n<li><strong>\u5236\u4f5c\u63d2\u4ef6\u7cfb\u7edf\u65f6<\/strong>\uff1a\u63d2\u4ef6\u7cfb\u7edf\u901a\u5e38\u4f9d\u8d56\u4e8e\u6838\u5fc3\u5e94\u7528\u7a0b\u5e8f\u7684\u4e8b\u4ef6\uff0c\u901a\u8fc7\u8ba2\u9605\u8fd9\u4e9b\u4e8b\u4ef6\uff0c\u63d2\u4ef6\u53ef\u4ee5\u5728\u9002\u5f53\u7684\u65f6\u5019\u6267\u884c\u7279\u5b9a\u7684\u903b\u8f91\u3002<\/li>\n<li><strong>\u5b9e\u73b0\u89e3\u8026\u7684\u670d\u52a1\u6216\u6a21\u5757\u95f4\u901a\u4fe1<\/strong>\uff1a\u5728\u5927\u578b\u7684\u524d\u7aef\u9879\u76ee\u4e2d\uff0c\u670d\u52a1\u6216\u6a21\u5757\u95f4\u7684\u89e3\u8026\u901a\u4fe1\u53ef\u4ee5\u6781\u5927\u5730\u589e\u52a0\u9879\u76ee\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u53ef\u6269\u5c55\u6027\u3002<\/li>\n<\/ul>\n<p><p>\u603b\u7684\u6765\u8bf4\uff0c\u4e8b\u4ef6\u8ba2\u9605\u548c\u53d1\u5e03\u662fJavaScript\u4e2d\u4e00\u79cd\u5f3a\u5927\u7684\u8bbe\u8ba1\u6a21\u5f0f\uff0c\u5b83\u80fd\u591f\u5e2e\u52a9\u5f00\u53d1\u8005\u6784\u5efa\u51fa\u7075\u6d3b\u3001\u53ef\u7ef4\u62a4\u7684\u5e94\u7528\u67b6\u6784\uff0c\u5e76\u4e14\u901a\u8fc7\u51cf\u5c11\u7ec4\u4ef6\u95f4\u7684\u76f4\u63a5\u4f9d\u8d56\uff0c\u8fdb\u4e00\u6b65\u589e\u5f3a\u4e86\u4ee3\u7801\u7684\u7a33\u5b9a\u6027\u548c\u6269\u5c55\u6027\u3002<\/p>\n<\/p>\n<h2><strong>\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n<p><strong>1. 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