{"id":217,"date":"2022-02-28T10:32:15","date_gmt":"2022-02-28T02:32:15","guid":{"rendered":"https:\/\/www.osvlabs.com\/blog\/?p=217"},"modified":"2022-02-28T10:39:08","modified_gmt":"2022-02-28T02:39:08","slug":"javascript-%e6%89%a7%e8%a1%8c%e6%9c%ba%e5%88%b6","status":"publish","type":"post","link":"https:\/\/blog.osvlabs.com\/?p=217","title":{"rendered":"JavaScript \u6267\u884c\u673a\u5236"},"content":{"rendered":"<p>JavaScript\u662f\u4e00\u95e8\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u5177\u4f53\u8be5\u600e\u4e48\u7406\u89e3\u5462\uff1f<\/p>\n<p>\u6211\u4eec\u5148\u770b\u770bJavaScript\u662f\u5982\u4f55\u5728\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\u7684\u3002<\/p>\n<p>\u65e2\u7136JavaScript\u662f\u4e00\u95e8\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u90a3\u4e48\u5b83\u5728\u6267\u884c\u7684\u65f6\u5019\uff0c\u80af\u5b9a\u662f\u9010\u884c\u6267\u884c\u4ee3\u7801\uff0c\u4e5f\u5c31\u662f\u8bf4\uff0cJavaScript\u4e2d\u7684\u4e00\u5207\u90fd\u53d1\u751f\u5728\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u628aJavaScript\u7684\u6267\u884c\u4e0a\u4e0b\u6587\u60f3\u8c61\u6210\u4e00\u4e2a\u5927\u5bb9\u5668\uff0c\u5bb9\u5668\u5185\u5206\u4e24\u4e2a\u90e8\u5206\uff0c\u4e00\u4e2a\u7528\u6765\u5b58\u50a8\u6570\u636e\uff0c\u4e00\u4e2a\u7528\u6765\u6267\u884c\u4ee3\u7801\u3002<\/p>\n<p>\u5b58\u50a8\u6570\u636e\u7684\u90e8\u5206\uff0c\u6211\u4eec\u628a\u5b83\u53eb\u505a&quot;\u5185\u5b58\u7ec4\u4ef6&quot;\u3002<\/p>\n<p>\u6267\u884c\u4ee3\u7801\u7684\u90e8\u5206\uff0c\u6211\u4eec\u628a\u5b83\u53eb\u505a&quot;\u4ee3\u7801\u7ec4\u4ef6&quot;\u6216\u8005\u201c\u6267\u884c\u7ebf\u7a0b\u201d\u3002<\/p>\n<p>\u4e3e\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50:<\/p>\n<pre><code class=\"language-javascript\">var a = 2;\nvar b = 4;\n\nvar sum = a + b;\n\nconsole.log(sum);<\/code><\/pre>\n<p>\u5728\u8fd9\u4e2a\u7b80\u5355\u7684\u4f8b\u5b50\u4e2d\uff0c\u6211\u4eec\u521d\u59cb\u5316\u4e86\u4e24\u4e2a\u53d8\u91cfa\u548cb\uff0c\u5e76\u5206\u522b\u5b58\u50a82\u548c4\u3002<\/p>\n<p>\u7136\u540e\u6211\u4eec\u5c06a\u548cb\u7684\u503c\u76f8\u52a0\u5e76\u5b58\u50a8\u5728sum\u53d8\u91cf\u4e2d\u3002<\/p>\n<p>\u90a3\u4e48JavaScript\u5c06\u5728\u6d4f\u89c8\u5668\u4e2d\u5982\u4f55\u6267\u884c\u8fd9\u6bb5\u4ee3\u7801\u5462\uff1f\u8bf7\u7ee7\u7eed\u770b\uff1a<\/p>\n<p><a href=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WechatIMG296.png\"><img src=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WechatIMG296.png\" alt=\"\" \/><\/a><\/p>\n<p>\u6d4f\u89c8\u5668\u521b\u5efa\u4e86\u4e00\u4e2a\u6709\u4e24\u4e2a\u7ec4\u4ef6\u7684\u5168\u5c40\u6267\u884c\u4e0a\u4e0b\u6587\uff0c\u8fd9\u4e24\u4e2a\u7ec4\u4ef6\u5206\u522b\u662f\u5185\u5b58\u7ec4\u4ef6\u548c\u4ee3\u7801\u7ec4\u4ef6\u3002<\/p>\n<p>\u6d4f\u89c8\u5668\u5c06\u5206\u4e24\u9636\u6bb5\u6267\u884c\u8fd9\u6bb5JavaScript\u4ee3\u7801\uff1a<\/p>\n<p>1&gt; \u5728\u5185\u5b58\u521b\u5efa\u9636\u6bb5\uff0cJavaScript\u4f1a\u626b\u63cf\u6240\u6709\u4ee3\u7801\uff0c\u4e3a\u4ee3\u7801\u4e2d\u7684\u6240\u6709\u53d8\u91cf\u548c\u51fd\u6570\u5206\u914d\u5185\u5b58\u3002<br \/>\n2&gt; \u5728\u4ee3\u7801\u6267\u884c\u9636\u6bb5\uff0cJavaScript\u5c06\u5728\u5185\u5b58\u521b\u5efa\u9636\u6bb5\u5206\u914d\u7684\u53d8\u91cf\u5b9a\u4e49\u4e3aundefined\uff0c\u5bf9\u4e8e\u51fd\u6570\uff0c\u5219\u4fdd\u7559\u6574\u4e2a\u51fd\u6570\u4ee3\u7801\u3002<\/p>\n<p><a href=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WX20220228-101445.png\"><img src=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WX20220228-101445.png\" alt=\"\" \/><\/a><\/p>\n<p>\u73b0\u5728\uff0c\u5728\u7b2c\u4e8c\u9636\u6bb5\uff0c\u5373\u4ee3\u7801\u6267\u884c\u9636\u6bb5\uff0c\u5f00\u59cb\u9010\u884c\u904d\u5386\u6574\u4e2a\u4ee3\u7801\u3002<\/p>\n<p>\u5f53\u9047\u5230var a = 2\u65f6\uff0c2\u4f1a\u5206\u914d\u7ed9\u5185\u5b58\u4e2d\u7684a\u3002\u6240\u4ee5\u4e4b\u524d\uff0ca\u7684\u503c\u662f\u672a\u5b9a\u4e49\u7684\u3002<\/p>\n<p>\u540c\u7406b\u53d8\u91cf\u4e5f\u5982\u6b64\uff0c4\u5206\u914d\u7ed9b\u3002\u7136\u540e\u8ba1\u7b97sum\u7684\u503c\u5e76\u5b58\u50a8\u5728\u5185\u5b58\u4e2d\uff0c\u53736\u3002\u6700\u540e\u4e00\u6b65\uff0c\u5728\u63a7\u5236\u53f0\u4e2d\u6253\u5370sum\u503c\uff0c\u7136\u540e\u5728\u5b8c\u6210\u4ee3\u7801\u65f6\u9500\u6bc1\u5168\u5c40\u6267\u884c\u4e0a\u4e0b\u6587\u3002<\/p>\n<p>\u4e0a\u9762\u6211\u4eec\u53ea\u662f\u770b\u4e86\u4e00\u4e2a\u5f88\u7b80\u5355\u7684\u4f8b\u5b50\uff0c\u4f46\u662f\u5b9e\u9645\u5e94\u7528\u4e2d\uff0c\u4e1a\u52a1\u903b\u8f91\u662f\u5f88\u590d\u6742\u7684\uff0c\u90a3\u4e48\u5bf9\u4e8e\u590d\u6742\u7684\u4ee3\u7801\uff0cJavaScript\u662f\u5982\u4f55\u5728\u201c\u5bb9\u5668\u201d\u5185\u6267\u884c\u7684\u5462\uff1f<\/p>\n<h2>\u8c03\u7528\u5806\u6808<\/h2>\n<p>\u6211\u4eec\u901a\u8fc7\u4e00\u4e2a\u6ca1\u6709\u5b9e\u9645\u610f\u4e49\u7684\u4ee3\u7801\uff0c\u6765\u7406\u89e3\u8fd9\u4e2a\u95ee\u9898\u3002<\/p>\n<pre><code class=\"language-javascript\">function a() {\n    function insideA() {\n        return true;\n    }\n    insideA();\n}\na();<\/code><\/pre>\n<p>\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u51fd\u6570a\uff0c\u5b83\u8c03\u7528\u53e6\u4e00\u4e2a\u8fd4\u56detrue\u7684\u51fd\u6570insideA\u3002<\/p>\n<p><a href=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WX20220228-101559.png\"><img src=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/WX20220228-101559.png\" alt=\"\" \/><\/a><\/p>\n<p>JavaScript\u521b\u5efa\u4e86\u4e00\u4e2a\u5168\u5c40\u6267\u884c\u4e0a\u4e0b\u6587\u3002<\/p>\n<p>\u5168\u5c40\u6267\u884c\u4e0a\u4e0b\u6587\u5165\u6808\u3002<\/p>\n<p>\u5168\u5c40\u6267\u884c\u4e0a\u4e0b\u6587\u5c06\u5728\u4ee3\u7801\u6267\u884c\u9636\u6bb5\u4e3a\u51fd\u6570a\u5206\u914d\u5185\u5b58\u5e76\u8c03\u7528\u51fd\u6570a\u3002<\/p>\n<p>a\u51fd\u6570\u518d\u5165\u6808\u3002<\/p>\n<p>a\u51fd\u6570\u4e2d\u8c03\u7528\u51fd\u6570insideA\u3002<\/p>\n<p>insideA\u51fd\u6570\u518d\u5165\u6808\u3002<\/p>\n<p>\u6267\u884cinsideA\uff0c\u8fd4\u56detrue\u3002<\/p>\n<p>\u6839\u636e\u5806\u6808\u7a7a\u95f4\uff0c\u5148\u5165\u540e\u51fa\u7684\u539f\u5219\u3002insideA\u5148\u51fa\u6808\uff0ca\u518d\u51fa\u6808\uff0c\u6700\u540e\u5168\u5c40\u4e0a\u4e0b\u6587\u5168\u90e8\u6267\u884c\u5b8c\u6bd5\uff0c\u9500\u6bc1\u6574\u4e2a\u6267\u884c\u4e0a\u4e0b\u6587\u3002<\/p>\n<p>\u901a\u8fc7\u4e0a\u9762\u7684\u4e24\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u53ef\u4ee5\u66f4\u52a0\u6e05\u695a\u5730\u8ba4\u8bc6\u5230\uff0c\u201cJavaScript\u4e2d\u7684\u4e00\u5207\u90fd\u53d1\u751f\u5728\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u3002\u201d<\/p>\n<h1>JavaScript \u540c\u6b65\u548c\u5f02\u6b65<\/h1>\n<p>JavaScript\u662f\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u4f46\u662f\u5bf9\u4e8e\u5b9e\u9645\u4e1a\u52a1\u573a\u666f\u4e2d\uff0c\u6709\u4e9b\u4ee3\u7801\u7684\u6267\u884c\u5e76\u4e0d\u662f\u7acb\u523b\u5c31\u6709\u8fd4\u56de\u7ed3\u679c\u7684\uff0c\u6bd4\u5982\uff0c\u8bf7\u6c42api\u6570\u636e\uff0c\u6587\u4ef6IO\uff0c\u5ef6\u65f6\u4efb\u52a1\u7b49\u7b49\u3002\u5982\u679cJavaScript\u90fd\u6309\u7167\u9010\u884c\u6267\u884c\u7684\u673a\u5236\u53bb\u6267\u884c\uff0c\u90a3\u4e48\u4f1a\u5f88\u5f71\u54cd\u4ee3\u7801\u7684\u6267\u884c\u6548\u7387\u548c\u6027\u80fd\u3002<\/p>\n<p>\u90a3\u4e48\u9762\u5bf9\u8bf7\u6c42api\u6570\u636e\uff0c\u6587\u4ef6IO\uff0c\u5ef6\u65f6\u4efb\u52a1\u7b49\u7b49\u8fd9\u4e9b\u4efb\u52a1\u65f6\uff0c\u6211\u4eec\u6539\u600e\u4e48\u5904\u7406\uff0c\u53c8\u4e0d\u5f71\u54cd\u6027\u80fd\u5462\uff1f<\/p>\n<p>\u5728\u8fd9\u91cc\u6211\u4eec\u9700\u8981\u4e86\u89e3\u4e24\u4e2a\u540d\u8bcd\uff0c\u201c\u540c\u6b65\u201d\u548c\u201c\u5f02\u6b65\u201d\u3002<\/p>\n<p>\u5728JavaScript\u4e2d\uff0c\u201c\u540c\u6b65\u201d\u5e76\u4e0d\u662f\u6240\u6709\u4ee3\u7801\u4e00\u8d77\u6267\u884c\uff0c\u800c\u662f\u4ee3\u7801\u9010\u884c\u6267\u884c\u3002\u201c\u5f02\u6b65\u201d\u5e76\u4e0d\u662f\u5b8c\u5168\u9010\u884c\u6267\u884c\u4ee3\u7801\uff0c\u5bf9\u4e8e\u67d0\u4e9b\u7279\u5b9a\u7684\u64cd\u4f5c\uff0c\u6bd4\u5982\u8bf7\u6c42api\u6570\u636e\uff0c\u6587\u4ef6IO\uff0c\u5ef6\u65f6\u4efb\u52a1\u7b49\u7b49\u8fd9\u4e9b\u4efb\u52a1\uff0c\u5219\u5148\u6302\u8d77\uff0c\u7b49\u5230\u540e\u9762\u7684\u540c\u6b65\u4ee3\u7801\u6267\u884c\u5b8c\u540e\uff0c\u518d\u56de\u5934\u6267\u884c\u5f02\u6b65\u3002<\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\u6765\u7406\u89e3\u5f02\u6b65:<\/p>\n<pre><code class=\"language-JavaScript\">console.log(&#039;1&#039;);\nsetTimeout(function () {\n  console.log(&#039;2&#039;);\n},1000)\nconsole.log(&#039;3&#039;);\n\n\/* \u6253\u5370\u51fa 1 3 2 *\/<\/code><\/pre>\n<p>\u5982\u679c\u4e0a\u9762\u7684\u4ee3\u7801\u5b8c\u5168\u6309\u7167\u9010\u884c\u6267\u884c\uff0c\u90a3\u4e48\u6253\u5370\u7684\u987a\u5e8f\u5e94\u8be5\u662f 1 2 3\u3002<br \/>\n\u4f46\u662f\u5b9e\u9645\u4e0a\u8f93\u51fa\u7684\u987a\u5e8f\u662f1 3 2\u3002<\/p>\n<p>\u4e3a\u4ec0\u4e483\u4f1a\u5148\u4e8e2\u8f93\u51fa\u5462\uff1f\u8fd9\u5c31\u662f\u5f02\u6b65\u7684\u4f5c\u7528\uff0c\u56e0\u4e3a2\u662f\u5728\u5f02\u6b65\u65b9\u6cd5setTimeout\u4e2d\u7684\uff0c\u6240\u4ee5console.log(&#8216;3&#8217;)\u4f18\u5148\u6267\u884c\u3002<\/p>\n<h1>JavaScript Event Loop<\/h1>\n<p>\u6211\u4eec\u5148\u901a\u8fc7\u4e00\u5f20\u56fe\u6765\u4e86\u89e3javascript\u7684\u6574\u4e2a\u8fd0\u884c\u673a\u5236:<\/p>\n<p><a href=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/f4385dd3-e05b-46a7-a768-303fe8a6a1ca.png\"><img src=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/f4385dd3-e05b-46a7-a768-303fe8a6a1ca.png\" alt=\"\" \/><\/a><\/p>\n<p>\u901a\u8fc7\u4e0a\u56fe\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\uff0cjavascript\u5b9e\u9645\u4e0a\u662f\u5206\u4e3a\u4e24\u6761\u4efb\u52a1\u7ebf\u7684\u3002<\/p>\n<p>\u7b2c\u4e00\u6761\u4e3b\u7ebf\u7a0b\uff0c\u5728\u8fd9\u91cc\u6267\u884c\u7684\u90fd\u662f\u540c\u6b65\u4efb\u52a1\uff0c\u4e5f\u5c31\u662f\u9010\u884c\u6267\u884c\u4ee3\u7801\u3002<\/p>\n<p>\u9047\u5230\u9700\u8981\u5f02\u6b65\u6267\u884c\u7684\u4ee3\u7801\u65f6\uff0c\u5c31\u4ea4\u7ed9\u7b2c\u4e8c\u6761\u4efb\u52a1\u7ebf\u201c\u5f02\u6b65\u4efb\u52a1\u201d\u7ebf\u7a0b\u53bb\u6267\u884c\u3002<\/p>\n<p>\u5b8c\u6574\u8fc7\u7a0b\u5165\u4e0b:<\/p>\n<p>\u6240\u6709\u540c\u6b65\u4efb\u52a1\u90fd\u5728\u4e3b\u7ebf\u7a0b\u4e0a\u6267\u884c\uff0c\u5f62\u6210\u4e00\u4e2a\u6267\u884c\u6808\uff0c\u5f53\u6267\u884c\u6808\u9047\u5230\u5f02\u6b65\u4efb\u52a1\u65f6\uff08\u8bf7\u6c42api\u6570\u636e\uff0c\u6587\u4ef6IO\uff0c\u5ef6\u65f6\u4efb\u52a1\u7b49\u7b49\uff09\uff0c\u4e0d\u4f1a\u7b49\u5f85\uff0c\u800c\u662f\u7ee7\u7eed\u6267\u884c\u5f80\u4e0b\u6267\u884c\u3002\u5f02\u6b65\u4efb\u52a1\u4f1a\u4ea4\u7ed9\u53e6\u4e00\u4e2a\u4efb\u52a1\u7ebf\u7a0b\u53bb\u6267\u884c\uff0c\u6267\u884c\u540e\u8fd4\u56de\u7684\u7ed3\u679c\uff0c\u4f1a\u8fd4\u56de\u5230\u4efb\u52a1\u961f\u5217\u4e2d\u3002\u4e00\u65e6\u4e3b\u7ebf\u7a0b\u4e2d\u7684\u6240\u6709\u540c\u6b65\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u6808\u5185\u88ab\u6e05\u7a7a\u4e86\uff0c\u5c31\u4ee3\u8868\u4e3b\u7ebf\u7a0b\u7a7a\u95f2\u4e86\uff0c\u8fd9\u4e2a\u65f6\u5019\u5c31\u4f1a\u53bb\u4efb\u52a1\u961f\u5217\u4e2d\u6309\u7167\u987a\u5e8f\u8bfb\u53d6\u4e00\u4e2a\u4efb\u52a1\u653e\u5165\u5230\u6808\u4e2d\u6267\u884c\uff08\u4efb\u52a1\u961f\u5217\u4e2d\uff0c\u6309\u7167\u5148\u5165\u5148\u51fa\u7684\u539f\u5219\u8fdb\u5165\u4e3b\u7ebf\u7a0b\uff09\u3002\u540c\u6837\u7684\uff0c\u7b49\u4ece\u4efb\u52a1\u961f\u5217\u4e2d\u53d6\u5230\u4efb\u52a1\u88ab\u4e3b\u7ebf\u7a0b\u6267\u884c\u5b8c\uff0c\u4e3b\u7ebf\u7a0b\u6e05\u7a7a\u540e\uff0c\u4f1a\u518d\u53bb\u4efb\u52a1\u961f\u5217\u5185\u53d6\u4e0b\u4e00\u4e2a\u4efb\u52a1\uff0c\u800c\u8fd9\u79cd\u5faa\u73af\u7684\u673a\u5236\uff0c\u5c31\u79f0\u4e4b\u4e3a\u4e8b\u4ef6\u5faa\u73af\uff08Event Loop\uff09\u3002<\/p>\n<h1>JavaScript \u5b8f\u4efb\u52a1\u548c\u5fae\u4efb\u52a1<\/h1>\n<p>\u6211\u4eec\u518d\u770b\u4e00\u4e2a\u4f8b\u5b50:<\/p>\n<pre><code class=\"language-JavaScript\">console.log(1)\n\nsetTimeout(function(){\n    console.log(2)\n},0)\n\nnew Promise(function(resolve){\n    resolve()\n}).then(function(){\n    console.log(3)\n})\n\nconsole.log(4)\n\n\/* \u6253\u5370\u51fa 1 4 3 2 *\/<\/code><\/pre>\n<p>\u6309\u7167\u4e4b\u524d\u7684\u903b\u8f91\uff0c\u8f93\u51fa\u987a\u5e8f\u5e94\u8be51\uff0c4\uff0c2\uff0c3\u3002 \u4f46\u662f\u5f53\u6211\u4eec\u5b9e\u9645\u8fd0\u884c\u7684\u65f6\u5019\uff0c\u53d1\u73b0\u8fd4\u56de\u7ed3\u679c\u662f 1\uff0c4\uff0c3\uff0c2\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\u5462\uff1f\u56e0\u4e3a\u4efb\u52a1\u961f\u5217\u4e2d\u7684\u4efb\u52a1\uff0c\u4e5f\u662f\u6709\u4f18\u5148\u7ea7\u7684\u3002<\/p>\n<p>\u8fd9\u65f6\u6211\u4eec\u5c31\u9700\u8981\u5f15\u5165\u4e86\u89e3\u4e24\u4e2a\u65b0\u6982\u5ff5&#8211;\u5b8f\u4efb\u52a1\u548c\u5fae\u4efb\u52a1\u3002<\/p>\n<p>\u5b8f\u4efb\u52a1:<br \/>\n\u53ef\u4ee5\u7406\u89e3\u662f\u6bcf\u6b21\u6267\u884c\u6808\u6267\u884c\u7684\u4ee3\u7801\u5c31\u662f\u4e00\u4e2a\u5b8f\u4efb\u52a1\uff08\u5305\u62ec\u6bcf\u6b21\u4ece\u4e8b\u4ef6\u961f\u5217\u4e2d\u83b7\u53d6\u4e00\u4e2a\u4e8b\u4ef6\u56de\u8c03\u5e76\u653e\u5230\u6267\u884c\u6808\u4e2d\u6267\u884c\uff09<\/p>\n<p>\u5fae\u4efb\u52a1:\u53ef\u4ee5\u7406\u89e3\u662f\u5728\u5f53\u524d\u4efb\u52a1\u6267\u884c\u7ed3\u675f\u540e\u7acb\u5373\u6267\u884c\u7684\u4efb\u52a1\u3002<\/p>\n<p>\u5982\u679c\u4f60\u4e0d\u80fd\u9a6c\u4e0a\u7406\u89e3\uff0c\u6ca1\u5173\u7cfb\uff0c\u6211\u4eec\u7ed9\u51fa\u4e00\u4e9b\u5e38\u89c1\u7684\u5b8f\u4efb\u52a1\u548c\u5fae\u4efb\u52a1\u5b9e\u4f8b\u3002<\/p>\n<pre><code class=\"language-markdown\">\u5b8f\u4efb\u52a1\u5305\u542b\uff1a\nscript(\u6574\u4f53\u4ee3\u7801)\nsetTimeout\nsetInterval\nI\/O\nUI\u4ea4\u4e92\u4e8b\u4ef6<\/code><\/pre>\n<pre><code class=\"language-markdown\">\u5fae\u4efb\u52a1\u5305\u542b\uff1a\nPromise.then\nprocess.nextTick<\/code><\/pre>\n<p>\u5b8f\u4efb\u52a1\u548c\u5fae\u4efb\u52a1\u7684\u6267\u884c\u8fc7\u7a0b\u5982\u4e0b:<\/p>\n<p><a href=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/a686d3c9-4e97-4e6a-8dfa-dbb3ed2660de.png\"><img src=\"https:\/\/blog.osvlabs.com\/wp-content\/uploads\/2022\/02\/a686d3c9-4e97-4e6a-8dfa-dbb3ed2660de.png\" alt=\"\" \/><\/a><\/p>\n<ul>\n<li>\u6267\u884c\u4e00\u4e2a\u5b8f\u4efb\u52a1\uff08\u6808\u4e2d\u6ca1\u6709\u5c31\u4ece\u4e8b\u4ef6\u961f\u5217\u4e2d\u83b7\u53d6\uff09<\/li>\n<li>\u6267\u884c\u8fc7\u7a0b\u4e2d\u5982\u679c\u9047\u5230\u5fae\u4efb\u52a1\uff0c\u5c31\u5c06\u5b83\u6dfb\u52a0\u5230\u5fae\u4efb\u52a1\u7684\u4efb\u52a1\u961f\u5217\u4e2d<\/li>\n<li>\u5b8f\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\u540e\uff0c\u7acb\u5373\u6267\u884c\u5f53\u524d\u5fae\u4efb\u52a1\u961f\u5217\u4e2d\u7684\u6240\u6709\u5fae\u4efb\u52a1\uff08\u4f9d\u6b21\u6267\u884c\uff09<\/li>\n<li>\u5f53\u524d\u6240\u6709\u5b8f\u4efb\u52a1\u548c\u5fae\u4efb\u52a1\u6267\u884c\u5b8c\u6bd5\uff0c\u5f00\u59cb\u6e32\u67d3<\/li>\n<li>\u6e32\u67d3\u5b8c\u6bd5\u540e\uff0c\u5f00\u59cb\u4e0b\u4e00\u4e2a\u5b8f\u4efb\u52a1<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript\u662f\u4e00\u95e8\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u5177\u4f53\u8be5\u600e\u4e48\u7406\u89e3\u5462\uff1f \u6211\u4eec\u5148\u770b\u770bJavaScript\u662f\u5982\u4f55\u5728\u6d4f\u89c8\u5668\u4e2d\u6267\u884c\u7684\u3002 \u65e2\u7136JavaScript\u662f\u4e00\u95e8\u5355\u7ebf\u7a0b\u8bed\u8a00\uff0c\u90a3\u4e48\u5b83\u5728\u6267\u884c\u7684\u65f6\u5019\uff0c\u80af\u5b9a\u662f\u9010\u884c\u6267\u884c\u4ee3\u7801\uff0c\u4e5f\u5c31\u2026<\/p>\n","protected":false},"author":6,"featured_media":221,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[2],"tags":[],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":5}},"_links":{"self":[{"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/posts\/217"}],"collection":[{"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=217"}],"version-history":[{"count":4,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/posts\/217\/revisions"}],"predecessor-version":[{"id":226,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/posts\/217\/revisions\/226"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=\/wp\/v2\/media\/221"}],"wp:attachment":[{"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=217"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=217"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.osvlabs.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=217"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}