{"id":10209,"date":"2023-11-28T21:29:30","date_gmt":"2023-11-28T13:29:30","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10209"},"modified":"2023-11-30T19:00:32","modified_gmt":"2023-11-30T11:00:32","slug":"javascript-zhongjavascript-yan-chi-jia-zai-de-fang","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhongjavascript-yan-chi-jia-zai-de-fang\/","title":{"rendered":"JavaScript \u4e2d JavaScript \u5ef6\u8fdf\u52a0\u8f7d\u7684\u65b9\u5f0f\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"

JavaScript \u7684\u5ef6\u8fdf\u52a0\u8f7d\u662f\u6307\u63a8\u8fdf\u9875\u9762\u52a0\u8f7d\u65f6\u7684 JavaScript \u6587\u4ef6\u52a0\u8f7d\u548c\u6267\u884c\uff0c\u4ee5\u4f18\u5316\u9875\u9762\u52a0\u8f7d\u6027\u80fd\u3002\u4ee5\u4e0b\u662f\u51e0\u79cd JavaScript \u5ef6\u8fdf\u52a0\u8f7d\u7684\u65b9\u5f0f\uff1a<\/p>\n

<\/span><\/a>1. defer<\/code> \u5c5e\u6027\uff1a<\/strong><\/h3>\n

\u4f7f\u7528 <script><\/code> \u6807\u7b7e\u7684 defer<\/code> \u5c5e\u6027\u53ef\u4ee5\u5ef6\u8fdf JavaScript \u6587\u4ef6\u7684\u52a0\u8f7d\u548c\u6267\u884c\uff0c\u4f7f\u5f97\u811a\u672c\u5728 HTML \u89e3\u6790\u5b8c\u6bd5\u540e\u6267\u884c\u3002<\/p>\n

<script src="example.js" defer><\/script>\n<\/code><\/pre>\n
<\/span><\/a>2. \u52a8\u6001\u521b\u5efa <script><\/code> \u5143\u7d20\uff1a<\/strong><\/h3>\n
\u4f7f\u7528 JavaScript \u52a8\u6001\u521b\u5efa <script><\/code> \u6807\u7b7e\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u6587\u6863\u4e2d\uff0c\u53ef\u4ee5\u63a7\u5236\u811a\u672c\u7684\u52a0\u8f7d\u548c\u6267\u884c\u65f6\u673a\u3002<\/p>\n
const script = document.createElement('script');\nscript.src = 'example.js';\ndocument.body.appendChild(script);\n<\/code><\/pre>\n
<\/span><\/a>3. async<\/code> \u5c5e\u6027\uff08\u5f02\u6b65\u52a0\u8f7d\uff09\uff1a<\/strong><\/h3>\n
async<\/code> \u5c5e\u6027\u7528\u4e8e\u5f02\u6b65\u52a0\u8f7d\u811a\u672c\uff0c\u5728\u52a0\u8f7d\u8fc7\u7a0b\u4e2d\u4e0d\u4f1a\u963b\u6b62\u9875\u9762\u7684\u89e3\u6790\u548c\u6e32\u67d3\uff0c\u5e76\u884c\u52a0\u8f7d\u591a\u4e2a\u811a\u672c\u3002<\/p>\n
<script src="example.js" async><\/script>\n<\/code><\/pre>\n
<\/span><\/a>4. \u4f7f\u7528\u52a8\u6001\u5f15\u5165\u7684 import()<\/code>\uff1a<\/strong><\/h3>\n
\u5728\u73b0\u4ee3\u6d4f\u89c8\u5668\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528 ES6 \u7684\u52a8\u6001\u5f15\u5165\u8bed\u6cd5 import()<\/code> \u6765\u5ef6\u8fdf\u52a0\u8f7d\u6a21\u5757\uff0c\u8fd9\u4e5f\u4f1a\u5f02\u6b65\u52a0\u8f7d\u6a21\u5757\u5e76\u8fd4\u56de\u4e00\u4e2a Promise\u3002<\/p>\n
import('example.js')\n  .then(module => {\n    \/\/ \u6a21\u5757\u52a0\u8f7d\u6210\u529f\u540e\u7684\u5904\u7406\n  })\n  .catch(err => {\n    \/\/ \u52a0\u8f7d\u5931\u8d25\u7684\u5904\u7406\n  });\n<\/code><\/pre>\n
<\/span><\/a>\u6ce8\u610f\u4e8b\u9879\uff1a<\/h3>\n
    \n
  • defer<\/code> \u5c5e\u6027\u548c\u52a8\u6001\u521b\u5efa <script><\/code> \u6807\u7b7e\u4f1a\u4fdd\u8bc1\u811a\u672c\u7684\u6267\u884c\u987a\u5e8f\u4e0e\u9875\u9762\u4e2d\u51fa\u73b0\u7684\u987a\u5e8f\u4e00\u81f4\uff0c\u4f46 async<\/code> \u5c5e\u6027\u548c\u52a8\u6001\u5f15\u5165\u7684 import()<\/code> \u5219\u4e0d\u4e00\u5b9a\u4fdd\u8bc1\u987a\u5e8f\u3002<\/li>\n<\/ul>\n
    \u9009\u62e9\u9002\u5f53\u7684\u5ef6\u8fdf\u52a0\u8f7d\u65b9\u5f0f\u53d6\u51b3\u4e8e\u9879\u76ee\u7684\u9700\u6c42\u548c\u6027\u80fd\u4f18\u5316\u7684\u76ee\u6807\u3002\u5e38\u89c1\u7684\u573a\u666f\u662f\u5c06\u4e0d\u5f71\u54cd\u9875\u9762\u52a0\u8f7d\u9996\u5c4f\u5185\u5bb9\u7684 JavaScript \u811a\u672c\u8fdb\u884c\u5ef6\u8fdf\u52a0\u8f7d\uff0c\u4ee5\u63d0\u5347\u9875\u9762\u52a0\u8f7d\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    JavaScript \u7684\u5ef6\u8fdf\u52a0\u8f7d\u662f\u6307\u63a8\u8fdf\u9875\u9762\u52a0\u8f7d\u65f6\u7684 JavaScript \u6587\u4ef6\u52a0\u8f7d\u548c\u6267\u884c\uff0c\u4ee5\u4f18\u5316\u9875\u9762\u52a0\u8f7d\u6027\u80fd […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-10209","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10209","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10209"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10209\/revisions"}],"predecessor-version":[{"id":13663,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10209\/revisions\/13663"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10209"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10209"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10209"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}