{"id":2394,"date":"2025-10-17T18:38:57","date_gmt":"2025-10-17T10:38:57","guid":{"rendered":"https:\/\/www.madbull.site\/?p=2394"},"modified":"2025-10-20T16:47:23","modified_gmt":"2025-10-20T08:47:23","slug":"nodejs%e4%b8%ad%ef%bc%8c%e7%ae%ad%e5%a4%b4%e5%87%bd%e6%95%b0%e3%80%81%e6%99%ae%e9%80%9a%e5%8c%bf%e5%90%8d%e5%87%bd%e6%95%b0%e4%b8%8e%e6%9c%89%e5%90%8d%e5%87%bd%e6%95%b0%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/www.madbull.site\/?p=2394","title":{"rendered":"JavaScript\u4e2d\uff0c\u7bad\u5934\u51fd\u6570\u3001\u533f\u540d\u51fd\u6570\u4e0e\u6709\u540d\u51fd\u6570\u7684\u533a\u522b"},"content":{"rendered":"\n

\u5728 JavaScript \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e09\u79cd\u51fd\u6570\u5f62\u5f0f\uff1a\u7bad\u5934\u51fd\u6570\uff08Arrow Functions\uff09<\/strong>\u3001\u666e\u901a\u533f\u540d\u51fd\u6570\uff08Anonymous Functions\uff09<\/strong> \u548c \u6709\u540d\u51fd\u6570\uff08Named Functions\uff09<\/strong>\u3002\u867d\u7136\u5b83\u4eec\u90fd\u80fd\u6267\u884c\u4ee3\u7801\uff0c\u4f46\u5176\u884c\u4e3a\u3001\u4f5c\u7528\u57df\u548c\u9002\u7528\u573a\u666f\u6709\u7740\u663e\u8457\u5dee\u5f02\u3002<\/p>\n\n\n\n

\u672c\u6587\u5c06\u6df1\u5165\u63a2\u8ba8\u8fd9\u4e09\u79cd\u51fd\u6570\u7684\u6838\u5fc3\u533a\u522b\uff0c\u5e76\u7ed3\u5408\u5b9e\u9645\u793a\u4f8b\uff0c\u5e2e\u52a9\u4f60\u505a\u51fa\u66f4\u660e\u667a\u7684\u9009\u62e9\u3002<\/p>\n\n\n\n

\n\n\n\n

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\u8bed\u6cd5\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n

\/\/ \u7b80\u5355\u7684\u7bad\u5934\u51fd\u6570\nconst greet = (name) => `Hello, ${name}!`;\n\n\/\/ \u591a\u884c\u51fd\u6570\u4f53\nconst processUser = (user) => {\n    if (!user.active) return null;\n    return { ...user, processed: true };\n};<\/code><\/pre>\n\n\n\n
\u6838\u5fc3\u7279\u6027\uff1a<\/strong><\/p>\n\n\n\n
    \n
  1. \u8bcd\u6cd5\u7ed1\u5b9a this<\/code><\/strong>\uff1a \u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684 this<\/code>\uff0c\u5b83\u4f1a\u7ee7\u627f\u5916\u5c42\u4f5c\u7528\u57df\u7684 this<\/code> \u503c<\/strong>\u3002\u8fd9\u5728\u5f02\u6b65\u56de\u8c03\u4e2d\u5c24\u5176\u6709\u7528\uff0c\u907f\u514d\u4e86 this<\/code> \u6307\u5411\u4e22\u5931\u7684\u95ee\u9898\u3002 <\/li>\n\n\n\n
  2. \u6ca1\u6709 arguments<\/code> \u5bf9\u8c61<\/strong>\uff1a \u7bad\u5934\u51fd\u6570\u4e0d\u652f\u6301 arguments<\/code>\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528\u5269\u4f59\u53c2\u6570<\/strong>\uff08...args<\/code>\uff09\u66ff\u4ee3\u3002 <\/li>\n\n\n\n
  3. \u4e0d\u80fd\u7528\u4f5c\u6784\u9020\u51fd\u6570<\/strong>\uff1a \u7bad\u5934\u51fd\u6570\u4e0d\u80fd\u88ab new<\/code> \u8c03\u7528\uff0c\u56e0\u4e3a\u5b83\u6ca1\u6709 prototype<\/code> \u5c5e\u6027\u3002<\/li>\n\n\n\n
  4. \u8bed\u6cd5\u7b80\u6d01<\/strong>\uff1a \u5355\u53c2\u6570\u53ef\u7701\u7565\u62ec\u53f7\uff0c\u5355\u8868\u8fbe\u5f0f\u53ef\u7701\u7565\u82b1\u62ec\u53f7\u548c return<\/code>\u3002<\/li>\n<\/ol>\n\n\n\n
    \u9002\u7528\u573a\u666f<\/strong>\uff1a<\/p>\n\n\n\n
      \n
    • \u56de\u8c03\u51fd\u6570\uff08\u5982 setTimeout<\/code>\u3001array.map<\/code>\u3001\u4e8b\u4ef6\u76d1\u542c\uff09\u3002<\/li>\n\n\n\n
    • \u9700\u8981\u4fdd\u6301 this<\/code> \u6307\u5411\u5916\u5c42\u5bf9\u8c61\u7684\u573a\u666f\u3002<\/li>\n\n\n\n
    • \u7b80\u5355\u7684\u3001\u65e0\u72b6\u6001\u7684\u51fd\u6570\u8868\u8fbe\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n
      \n\n\n\n
      \u4e8c\u3001\u533f\u540d\u51fd\u6570\uff08function() {}<\/code>\uff09\uff1a\u52a8\u6001 this<\/code> \u4e0e\u7075\u6d3b\u6027<\/strong><\/h4>\n\n\n\n
      \u666e\u901a\u533f\u540d\u51fd\u6570\u4f7f\u7528 function<\/code> \u5173\u952e\u5b57\u5b9a\u4e49\uff0c\u4f46\u6ca1\u6709\u51fd\u6570\u540d\u3002<\/p>\n\n\n\n
      \u8bed\u6cd5\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
      const timer = setTimeout(function() {\n    console.log('Timeout!');\n}, 1000);\n\nconst users = ['Alice', 'Bob'];\nconst greetings = users.map(function(name) {\n    return `Hi, ${name}`;\n});<\/code><\/pre>\n\n\n\n
      \u6838\u5fc3\u7279\u6027\uff1a<\/strong><\/p>\n\n\n\n
        \n
      1. \u52a8\u6001\u7ed1\u5b9a this<\/code><\/strong>\uff1a this<\/code> \u7684\u503c\u7531\u8c03\u7528\u65b9\u5f0f<\/strong>\u51b3\u5b9a\u3002\u5728\u5bf9\u8c61\u65b9\u6cd5\u4e2d\u4f5c\u4e3a\u56de\u8c03\u65f6\uff0cthis<\/code> \u5bb9\u6613\u4e22\u5931\u3002<\/li>\n\n\n\n
      2. \u62e5\u6709 arguments<\/code> \u5bf9\u8c61<\/strong>\uff1a \u53ef\u4ee5\u8bbf\u95ee\u51fd\u6570\u8c03\u7528\u65f6\u4f20\u5165\u7684\u6240\u6709\u53c2\u6570\u3002<\/li>\n\n\n\n
      3. \u53ef\u7528\u4f5c\u6784\u9020\u51fd\u6570<\/strong>\uff1a \u53ef\u4ee5\u901a\u8fc7 new<\/code> \u521b\u5efa\u5b9e\u4f8b\u3002<\/li>\n\n\n\n
      4. \u51fd\u6570\u63d0\u5347<\/strong>\uff1a \u4f5c\u4e3a\u51fd\u6570\u8868\u8fbe\u5f0f\u65f6\uff0c\u53ea\u6709\u53d8\u91cf\u58f0\u660e\u88ab\u63d0\u5347\uff0c\u51fd\u6570\u4f53\u4e0d\u4f1a\u88ab\u63d0\u5347\u3002<\/li>\n<\/ol>\n\n\n\n
        \u9002\u7528\u573a\u666f<\/strong>\uff1a<\/p>\n\n\n\n
          \n
        • \u9700\u8981\u52a8\u6001 this<\/code> \u7684\u573a\u666f\uff08\u8f83\u5c11\u89c1\uff09\u3002<\/li>\n\n\n\n
        • \u9700\u8981 arguments<\/code> \u5bf9\u8c61\u7684\u51fd\u6570\uff08\u5c3d\u7ba1\u5269\u4f59\u53c2\u6570\u662f\u66f4\u597d\u7684\u9009\u62e9\uff09\u3002<\/li>\n\n\n\n
        • \u9700\u8981\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u7684\u573a\u666f\uff08\u4f46 ES6 class<\/code> \u66f4\u63a8\u8350\uff09\u3002<\/li>\n<\/ul>\n\n\n\n
          \n\n\n\n
          \u4e09\u3001\u6709\u540d\u51fd\u6570\uff08function named() {}<\/code>\uff09\uff1a\u53ef\u8bfb\u6027\u4e0e\u8c03\u8bd5\u4e4b\u738b<\/strong><\/h4>\n\n\n\n
          \u6709\u540d\u51fd\u6570\u5728\u5b9a\u4e49\u65f6\u5c31\u6709\u4e00\u4e2a\u660e\u786e\u7684\u540d\u79f0\u3002<\/p>\n\n\n\n
          \u8bed\u6cd5\u793a\u4f8b\uff1a<\/strong><\/p>\n\n\n\n
          \/\/ \u51fd\u6570\u58f0\u660e\nfunction calculateTotal(items) {\n    return items.reduce((sum, item) => sum + item.price, 0);\n}\n\n\/\/ \u6709\u540d\u51fd\u6570\u8868\u8fbe\u5f0f\nconst validateUser = function validate(userData) {\n    if (!userData.email) throw new Error('Email is required');\n    return true;\n};<\/code><\/pre>\n\n\n\n
          \u6838\u5fc3\u4f18\u52bf\uff1a<\/strong><\/p>\n\n\n\n
            \n
          1. \u5353\u8d8a\u7684\u8c03\u8bd5\u4f53\u9a8c<\/strong>\uff1a \u5728\u9519\u8bef\u5806\u6808\u4e2d\uff0c\u51fd\u6570\u540d\u6e05\u6670\u53ef\u89c1\uff0c\u6781\u5927\u7b80\u5316\u4e86\u95ee\u9898\u5b9a\u4f4d\u3002<\/li>\n\n\n\n
          2. \u652f\u6301\u9012\u5f52\u8c03\u7528<\/strong>\uff1a \u51fd\u6570\u5185\u90e8\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u540d\u79f0\u8c03\u7528\u81ea\u8eab\u3002 <\/li>\n\n\n\n
          3. \u51fd\u6570\u63d0\u5347\uff08\u4ec5\u51fd\u6570\u58f0\u660e\uff09<\/strong>\uff1a \u51fd\u6570\u58f0\u660e\u4f1a\u88ab\u5b8c\u5168\u63d0\u5347\uff0c\u53ef\u4ee5\u5728\u5b9a\u4e49\u524d\u8c03\u7528\u3002<\/li>\n\n\n\n
          4. \u63d0\u9ad8\u4ee3\u7801\u53ef\u8bfb\u6027<\/strong>\uff1a \u51fd\u6570\u540d\u672c\u8eab\u5c31\u662f\u6700\u597d\u7684\u6587\u6863\uff0c\u8ba9\u4ee3\u7801\u610f\u56fe\u4e00\u76ee\u4e86\u7136\u3002<\/li>\n<\/ol>\n\n\n\n
            \u9002\u7528\u573a\u666f<\/strong>\uff1a<\/p>\n\n\n\n
              \n
            • \u4efb\u4f55\u72ec\u7acb\u7684\u3001\u53ef\u590d\u7528\u7684\u529f\u80fd\u6a21\u5757\u3002<\/li>\n\n\n\n
            • \u9700\u8981\u9012\u5f52\u7684\u7b97\u6cd5\u3002<\/li>\n\n\n\n
            • \u590d\u6742\u7684\u56de\u8c03\u51fd\u6570\uff08\u8003\u8651\u4f7f\u7528\u6709\u540d\u51fd\u6570\u8868\u8fbe\u5f0f\uff09\u3002<\/li>\n\n\n\n
            • \u4efb\u4f55\u4f60\u5e0c\u671b\u4ee3\u7801\u66f4\u5177\u53ef\u7ef4\u62a4\u6027\u7684\u573a\u5408\u3002<\/li>\n<\/ul>\n\n\n\n
              \n\n\n\n
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              this<\/code> \u7ed1\u5b9a<\/strong><\/td>\u8bcd\u6cd5\uff08\u7ee7\u627f\u5916\u5c42\uff09<\/td>\u52a8\u6001\uff08\u8c03\u7528\u65f6\u51b3\u5b9a\uff09<\/td>\u52a8\u6001\uff08\u8c03\u7528\u65f6\u51b3\u5b9a\uff09<\/td><\/tr>
              arguments<\/code><\/strong><\/td>\u65e0\uff08\u7528 ...args<\/code>\uff09<\/td>\u6709<\/td>\u6709<\/td><\/tr>
              \u6784\u9020\u51fd\u6570<\/strong><\/td>\u5426<\/td>\u662f<\/td>\u662f<\/td><\/tr>
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              \u8c03\u8bd5\u5806\u6808<\/strong><\/td>\u663e\u793a\u4e3a =><\/code> \u6216\u53d8\u91cf\u540d<\/td>\u663e\u793a\u4e3a anonymous<\/code><\/td>\u663e\u793a\u51fd\u6570\u540d<\/td><\/tr>
              \u9012\u5f52<\/strong><\/td>\u4f9d\u8d56\u53d8\u91cf\u540d\uff08\u8106\u5f31\uff09<\/td>\u4f9d\u8d56\u53d8\u91cf\u540d\uff08\u8106\u5f31\uff09<\/td>\u76f4\u63a5\u8c03\u7528\uff08\u5065\u58ee\uff09<\/td><\/tr>
              \u53ef\u8bfb\u6027<\/strong><\/td>\u7b80\u6d01\uff0c\u4f46\u590d\u6742\u65f6\u5dee<\/td>\u7b80\u5355\u56de\u8c03\u597d\uff0c\u590d\u6742\u65f6\u5dee<\/td>\u6700\u4f73<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n
              \n\n\n\n
              \u7ed3\u8bed<\/strong><\/h4>\n\n\n\n
              \u9009\u62e9\u54ea\u79cd\u51fd\u6570\u5f62\u5f0f\uff0c\u4e0d\u5e94\u4ec5\u4ec5\u57fa\u4e8e\u8bed\u6cd5\u7684\u7b80\u6d01\u6027\uff0c\u800c\u5e94\u7efc\u5408\u8003\u8651\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\u3001\u8c03\u8bd5\u4fbf\u5229\u6027\u548c\u5b9e\u9645\u9700\u6c42<\/strong>\u3002\u5728\u5f00\u53d1\u4e2d\uff0c\u5408\u7406\u642d\u914d\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u3001\u533f\u540d\u51fd\u6570\u548c\u6709\u540d\u51fd\u6570\uff0c\u5c06\u5e2e\u52a9\u4f60\u6784\u5efa\u51fa\u65e2\u9ad8\u6548\u53c8\u7a33\u5065\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u8bb0\u4f4f\uff0c\u597d\u7684\u4ee3\u7801\u4e0d\u4ec5\u662f\u8ba9\u673a\u5668\u6267\u884c\u7684\uff0c\u66f4\u662f\u8ba9\u4eba\u9605\u8bfb\u548c\u7406\u89e3\u7684<\/strong>\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
              \u5728 JavaScript \u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e09\u79cd\u51fd\u6570\u5f62\u5f0f\uff1a\u7bad\u5934\u51fd\u6570\uff08Arrow Functions\uff09\u3001\u666e\u901a […]<\/p>\n","protected":false},"author":1,"featured_media":2395,"comment_status":"open","ping_status":"open","sticky":false,"template":"wp-custom-template-my","format":"standard","meta":{"footnotes":""},"categories":[700,154],"tags":[703,702,701],"class_list":["post-2394","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-web","category-154","tag-javascripts","tag-js","tag-nodejs"],"_links":{"self":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2394"}],"version-history":[{"count":5,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2394\/revisions"}],"predecessor-version":[{"id":2407,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/posts\/2394\/revisions\/2407"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=\/wp\/v2\/media\/2395"}],"wp:attachment":[{"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madbull.site\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}