<!DOCTYPE html>\n<html lang="zh">\n<head>\n <title>My Title<\/title>\n<\/head>\n<body>\n <h1>A Heading<\/h1>\n <a href="#">Link Text<\/a>\n<\/body>\n<\/html><\/code><\/pre><\/div>\n\n\n\n![\"\"](\"https:\/\/my-wp.oss-cn-beijing.aliyuncs.com\/wp-content\/uploads\/2022\/08\/20220808135838431.png\")
<\/figure>\n\n\n\n\u6982\u5ff5<\/h2>\n\n\n\n\u8282\u70b9\uff08Node\uff09<\/h3>\n\n\n\n
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- \u6587\u672c\u8282\u70b9<\/li>
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- …<\/li><\/ol>\n\n\n\n
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\u5173\u7cfb<\/h3>\n\n\n\n- \u7956\u5148 \u2014\u2014 \u5305\u542b\u540e\u4ee3\u5143\u7d20\u7684\u5143\u7d20\u662f\u7956\u5148\u5143\u7d20<\/li>
- \u540e\u4ee3 \u2014\u2014 \u88ab\u7956\u5148\u5143\u7d20\u5305\u542b\u7684\u5143\u7d20\u662f\u540e\u4ee3\u5143\u7d20<\/li>
- \u7236 \u2014\u2014 \u76f4\u63a5\u5305\u542b\u5b50\u5143\u7d20\u7684\u5143\u7d20\u662f\u7236\u5143\u7d20<\/li>
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- \u5144\u5f1f \u2014\u2014 \u62e5\u6709\u76f8\u540c\u7236\u5143\u7d20\u7684\u5143\u7d20\u662f\u5144\u5f1f\u5143\u7d20<\/li><\/ul>\n\n\n\n
\u5982\u4f55\u4f7f\u7528DOM<\/h2>\n\n\n\n
\u9762\u5411\u5bf9\u8c61\u7684\u7f16\u7a0b\u8bed\u8a00\uff0c\u65e0\u975e\u5c31\u662f\u4e24\u4e2a\u6b65\u9aa4\uff1a1.\u627e\u5bf9\u8c61\u30022.\u641e\u5bf9\u8c61\u3002\u6240\u4ee5\u4f7f\u7528DOM\u6211\u4eec\u9996\u5148\u8981\u5148\u62ff\u5230\u4e00\u4e2aDOM\u5bf9\u8c61\uff0c\u7136\u540e\u4ee5\u8be5\u5bf9\u8c61\u4e3a\u5207\u5165\u70b9\u6765\u5b8c\u6210\u5404\u79cd\u64cd\u4f5c\u3002<\/p>\n\n\n\n
Document\u5bf9\u8c61<\/h3>\n\n\n\n
Document\u5bf9\u8c61\u4ee3\u8868\u7684\u662f\u6574\u4e2a\u7684\u7f51\u9875\uff0c\u5728\u6d4f\u89c8\u5668\u4e2d\u5b83\u662fwindow\u5bf9\u8c61\u7684\u5c5e\u6027\uff08\u4e5f\u5c31\u662f\u5168\u5c40\u53d8\u91cf\uff09\uff0c\u5b83\u4e5f\u662f\u6211\u4eec\u6240\u6709DOM\u64cd\u4f5c\u7684\u5207\u5165\u70b9\uff0c\u5b9e\u9645\u4e0a\u4e4b\u524d\u6211\u4eec\u4e5f\u4f7f\u7528\u8fc7\u5b83\uff0c\u8fd8\u8bb0\u5f97document.write()<\/code>\u5417\uff1f\u73b0\u5728\u4f60\u53ef\u4ee5\u5c1d\u8bd5\u5728\u63a7\u5236\u53f0\u4e2d\u6253\u5370document\uff0c\u770b\u770b\u5b83\u8fd8\u5728\u4e0d\u5728\uff1f\u5982\u679c\u5b83\u8fd8\u5728\u90a3\u4e48\u4f60\u9700\u8981\u8bb0\u4f4f\uff0c\u5b83\u4ee3\u8868\u7684\u662f\u6574\u4e2a\u7f51\u9875\uff0c\u5b83\u7684\u5b50\u5143\u7d20\u662fhtml\u3002<\/p>\n\n\n\n\u4ece\u73b0\u5728\u5f00\u59cb\u6211\u4eec\u5b9e\u9645\u4e0a\u8fdb\u5165\u4e86\u5bbf\u4e3b\u5bf9\u8c61\u7684\u5b66\u4e60\uff0cDOM\u5c31\u662f\u4e00\u79cd\u5bbf\u4e3b\u5bf9\u8c61\uff0c\u5373\u7531\u8fd0\u884c\u73af\u5883\uff08\u6d4f\u89c8\u5668\uff09\u63d0\u4f9b\u7684\u5bf9\u8c61\u3002\u5bf9\u8c61\u7684\u590d\u6742\u7a0b\u5ea6\u4e5f\u5f00\u59cb\u63d0\u5347\uff0c\u6211\u4eec\u5148\u6765\u770b\u770bdocument\u7684\u7ee7\u627f\u5173\u7cfb\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/my-wp.oss-cn-beijing.aliyuncs.com\/wp-content\/uploads\/2022\/08\/20220808141848408.png\")
<\/figure>\n\n\n\n\u5728\u6807\u51c6\u4e2d\uff0cDocument\u7ee7\u627f\u4e86Node\uff0cNode\u7ee7\u627f\u4e86EventTarget\uff0c\u6362\u8a00\u4e4bEventTarget\u3001Node\u4ee5\u53caDocument\u4e2d\u6240\u5b9a\u4e49\u7684\u65b9\u6cd5document\u90fd\u53ef\u4ee5\u8c03\u7528\uff0c\u5b83\u5728\u6d4f\u89c8\u5668\u4e2d\u7684\u5b9e\u9645\u7ed3\u6784\u4f1a\u66f4\u590d\u6742\u4e00\u4e9b\uff0c\u8fd9\u91cc\u6211\u4eec\u6682\u65f6\u4e0d\u8fc7\u591a\u7684\u8d58\u8ff0\u3002<\/p>\n\n\n\n
Element\u5bf9\u8c61<\/h3>\n\n\n\n
\u5728\u7f51\u9875\u4e2d\u6240\u6709\u7684\u5143\u7d20\uff08\u6807\u7b7e\uff09\u90fd\u662f\u4e00\u4e2aElement\u5bf9\u8c61\u3002Element\u5bf9\u8c61\u7684\u7ee7\u627f\u5173\u7cfb\u548cDocument\u7c7b\u4f3c\uff1a<\/p>\n\n\n\n![\"\"](\"https:\/\/my-wp.oss-cn-beijing.aliyuncs.com\/wp-content\/uploads\/2022\/08\/20220808210844195.png\")
<\/figure>\n\n\n\n\u53ef\u4ee5\u901a\u8fc7Document\u6216\u5176\u4ed6\u5143\u7d20\u76f4\u63a5\u83b7\u53d6\u5df2\u6709\u7684Element\u5bf9\u8c61\uff0c\u4e5f\u53ef\u4ee5\u4f7f\u7528Document\u6765\u521b\u5efa\u65b0\u7684Element\u5bf9\u8c61\u3002\u6211\u4eec\u5148\u6765\u770b\u770b\u5982\u4f55\u901a\u8fc7document\u83b7\u53d6\u5df2\u6709\u7684Element\u5bf9\u8c61\u3002<\/p>\n\n\n\n
document.documentElement<\/code> \u83b7\u53d6html\u6839\u5143\u7d20<\/li>document.body<\/code> \u83b7\u53d6body\u5143\u7d20<\/li>document.getElementByID()<\/code> \u6839\u636eid\u83b7\u53d6\u4e00\u4e2a\u5143\u7d20<\/li>document.getElementsByClassName()<\/code> \u6839\u636eclass\u5c5e\u6027\u83b7\u53d6\u5143\u7d20\uff08\u5b9e\u65f6\u66f4\u65b0\u5217\u8868\uff09<\/li>document.getElementsByTagName()<\/code> \u6839\u636e\u6807\u7b7e\u540d\u83b7\u53d6\u5143\u7d20\uff08\u5b9e\u65f6\u66f4\u65b0\u5217\u8868\uff09<\/li>document.getElementsByName()<\/code> \u6839\u636ename\u5c5e\u6027\u83b7\u53d6\u5143\u7d20\uff08\u5b9e\u65f6\u66f4\u65b0\u5217\u8868\uff09<\/li>document.querySelector()<\/code> \u6839\u636e\u9009\u62e9\u5668\u83b7\u53d6\u4e00\u4e2a\u5143\u7d20<\/li>document.querySelectorAll()<\/code> \u6839\u636e\u9009\u62e9\u5668\u83b7\u53d6\u4e00\u7ec4\u5143\u7d20<\/li><\/ul>\n\n\n\n\u901a\u8fc7\u5176\u4ed6\u5143\u7d20\u83b7\u53d6\u5df2\u6709\u7684Element\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
element.children<\/code><\/li>element.parentNode<\/code><\/span><\/li>element<\/code>.firstElementChild<\/code><\/li>element<\/code><\/code>.lastElementChild<\/code><\/li>- ……<\/li><\/ul>\n\n\n\n
\u521b\u5efaElement\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
document.createElement()<\/code> \u6839\u636e\u6807\u7b7e\u540d\u521b\u5efa\u5143\u7d20\u8282\u70b9\u5bf9\u8c61<\/li><\/ul>\n\n\n\n\u6587\u672c<\/h3>\n\n\n\n
\u5728DOM\u4e2d\uff0c\u6587\u672c\u5185\u5bb9\u4e5f\u662f\u4e00\u4e2a\u8282\u70b9\u5bf9\u8c61\uff08Text\uff09\uff0c\u53ef\u4ee5\u901a\u8fc7\u83b7\u53d6\u6587\u672c\u5bf9\u8c61\u7136\u540e\u5b8c\u6210\u5bf9\u5b83\u7684\u5404\u79cd\u64cd\u4f5c\uff0c\u4f46\u8fd9\u79cd\u505a\u6cd5\u4f1a\u4f7f\u5f97\u4e8b\u60c5\u53d8\u5f97\u590d\u6742\uff0c\u5e76\u4e0d\u5efa\u8bae\u8fd9\u4e48\u505a\u3002\u5728\u5927\u90e8\u5206\u573a\u666f\u4e0b\uff0c\u53ef\u4ee5\u901a\u8fc7\u5143\u7d20\u7684\u5c5e\u6027\u6765\u64cd\u4f5c\u5176\u4e2d\u7684\u6587\u672c\u5185\u5bb9\uff0c\u6bd4\u5982\u6709\u5982\u4e0b\u6587\u672c\uff1a<\/p>\n\n\n\n
<div>div\u4e2d\u7684\u6587\u672c\u5185\u5bb9<\/div><\/code><\/pre><\/div>\n\n\n\n\u5047\u8bbe\u6211\u4eec\u5df2\u7ecf\u83b7\u53d6\u5230\u4e86div\u7684\u5143\u7d20\u8282\u70b9\u5bf9\u8c61\uff0c\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u7684\u5c5e\u6027\u6765\u5b8c\u6210\u5bf9\u6587\u672c\u7684\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
element.textContent<\/code><\/li>element.innerText<\/code><\/li>element.innerHTML<\/code><\/li><\/ul>\n\n\n\n\u5c5e\u6027<\/h3>\n\n\n\n
\u5c5e\u6027\u4e5f\u662f\u4e00\u4e2a\u8282\u70b9\u5bf9\u8c61\uff08Attr\uff09\uff0c\u548c\u6587\u672c\u4e00\u6837\uff0c\u901a\u5e38\u6211\u4eec\u4e0d\u4f1a\u53bb\u76f4\u63a5\u83b7\u53d6\u8282\u70b9\u5bf9\u8c61\uff0c\u800c\u662f\u901a\u8fc7\u5143\u7d20\u6765\u5b8c\u6210\u5bf9\u5c5e\u6027\u7684\u64cd\u4f5c\uff1a<\/p>\n\n\n\n
element.attrName<\/code><\/li>element.getAttribute(attrName)<\/code><\/li>element.setAttribute(name, value)<\/code><\/li><\/ul>\n\n\n\n\u4e8b\u4ef6\uff08event\uff09<\/h2>\n\n\n\n
\u4e8b\u4ef6\u6307\u7528\u6237\u548c\u7f51\u9875\u4e4b\u95f4\u53d1\u751f\u7684\u4ea4\u4e92\u884c\u4e3a\u3002\u6bd4\u5982\u70b9\u51fb\u6309\u94ae\u3001\u79fb\u52a8\u9f20\u6807\u3001\u6539\u53d8\u7a97\u53e3\u5927\u5c0f\u3001\u8868\u5355\u8f93\u5165\u7b49\u7b49\u7b49\u7b49\uff0c\u7528\u6237\u7684\u6240\u6709\u64cd\u4f5c\u90fd\u53ef\u4ee5\u88ab\u5f53\u6210\u662f\u4e00\u4e2a\u4e8b\u4ef6\u3002JS\u4e2d\u901a\u8fc7\u4e3a\u4e8b\u4ef6\u7ed1\u5b9a\u56de\u8c03\u51fd\u6570\u6765\u5904\u7406\u4e8b\u4ef6\uff0c\u7ed1\u5b9a\u56de\u8c03\u51fd\u6570\u540e\uff0c\u4e8b\u4ef6\u89e6\u53d1\u540e\u56de\u8c03\u51fd\u6570\u4fbf\u4f1a\u6267\u884c\uff0c\u4ee5\u6b64\u6765\u54cd\u5e94\u7528\u6237\u7684\u884c\u4e3a\uff0c\u6240\u4ee5\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u6211\u4eec\u4e5f\u79f0\u5176\u4e3a\u4e8b\u4ef6\u7684\u54cd\u5e94\u51fd\u6570\u3002<\/p>\n\n\n\n
\u7ed1\u5b9a\u56de\u8c03\u51fd\u6570<\/h3>\n\n\n\n- \u901a\u8fc7\u6807\u7b7e\u7684\u4e8b\u4ef6\u5c5e\u6027<\/li>
- \u901a\u8fc7\u5143\u7d20\u5bf9\u8c61\u7684\u4e8b\u4ef6\u5c5e\u6027<\/li>
- \u901a\u8fc7\u5143\u7d20addEventListener()\u65b9\u6cd5<\/li><\/ol>\n\n\n\n
\u65b9\u5f0f\u4e00\uff1a<\/p>\n\n\n\n
<button type="button" onclick="alert('\u6309\u94ae\u88ab\u70b9\u4e86\uff01')">\u70b9\u6211\u4e00\u4e0b<\/button><\/code><\/pre><\/div>\n\n\n\n\u65b9\u5f0f\u4e8c\uff1a<\/p>\n\n\n\n
const btn = document.getElementById("btn")\nbtn.onclick = function(){\n alert("\u6309\u94ae\u88ab\u70b9\u51fb\u4e86\uff01")\n}<\/code><\/pre><\/div>\n\n\n\n\u65b9\u5f0f\u4e09\uff1a<\/p>\n\n\n\n
const btn = document.getElementById("btn")\nbtn.addEventListener("click", function(){\n alert("\u6309\u94ae\u88ab\u70b9\u4e86")\n})<\/code><\/pre><\/div>\n\n\n\n\u5173\u4e8e\u4e8b\u4ef6\uff0c\u8fd8\u6709\u5f88\u591a\u7684\u5185\u5bb9\u53ef\u4ee5\u8bb2\u89e3\uff0c\u6211\u4eec\u4f1a\u5728\u540e\u8fb9\u7684\u8bfe\u7a0b\u4e2d\u8fdb\u884c\u8865\u5145\u3002<\/p>\n\n\n\n
\u6587\u6863\u52a0\u8f7d\u4e8b\u4ef6<\/h2>\n\n\n\n
\u5728\u7f51\u9875\u4e2d\u7f16\u5199DOM\u4ee3\u7801\u65f6\uff0c\u5982\u679c\u4f9d\u7136\u5c06script\u6807\u7b7e\u7f16\u5199\u5230head\u4e2d\uff0c\u4f1a\u6709\u65e0\u6cd5\u83b7\u53d6DOM\u5bf9\u8c61\u60c5\u51b5\u51fa\u73b0\u3002\u8fd9\u662f\u56e0\u4e3a\u7f51\u9875\u7684\u52a0\u8f7d\u662f\u81ea\u4e0a\u5411\u4e0b\u4f9d\u6b21\u52a0\u8f7d\u7684\uff0c\u5982\u679c\u5c06\u4ee3\u7801\u5199\u5728\u524d\u8fb9\u4f1a\u5bfc\u81f4\u4ee3\u7801\u6267\u884c\u65f6\u7f51\u9875\u8fd8\u6ca1\u6709\u52a0\u8f7d\uff0cDOM\u5bf9\u8c61\u4e5f\u5c31\u65e0\u6cd5\u83b7\u53d6\u4e86\u3002<\/p>\n\n\n\n
\u5982\u4f55\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\u5462\uff1f\u6709\u8fd9\u4e48\u51e0\u79cd\u65b9\u6848\uff1a<\/p>\n\n\n\n
- \u5c06script\u6807\u7b7e\u5199\u5728body\u7684\u6700\u540e<\/li>
- \u5c06js\u4ee3\u7801\u7f16\u5199\u5230window.onload\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u4e2d<\/li>
- \u5c06js\u4ee3\u7801\u7f16\u5199\u5230document\u5bf9\u8c61\u7684DOMContentLoaded\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u4e2d<\/li>
- \u5c06js\u4ee3\u7801\u7f16\u5199\u5230\u5916\u90e8\u7684js\u6587\u4ef6\u4e2d\uff0c\u5f15\u5165\u65f6\u4e3ascript\u6807\u7b7e\u6dfb\u52a0defer\u5c5e\u6027<\/li><\/ol>\n\n\n\n
\u65b9\u5f0f\u4e00\uff1a<\/p>\n\n\n\n
<!DOCTYPE html>\n<html lang="zh">\n <head>\n <meta charset="UTF-8" \/>\n <meta http-equiv="X-UA-Compatible" content="IE=edge" \/>\n <meta name="viewport" content="width=device-width, initial-scale=1.0" \/>\n <title>Document<\/title>\n <\/head>\n <body>\n <button type="button" id="btn">\u70b9\u6211\u4e00\u4e0b<\/button>\n\n <script>\n const btn = document.getElementById("btn")\n btn.addEventListener("click", function () {\n alert("\u6309\u94ae\u88ab\u70b9\u4e86")\n })\n <\/script>\n <\/body>\n<\/html><\/code><\/pre><\/div>\n\n\n\n\u4ee3\u7801\u7f16\u5199\u5230\u4e86body\u7684\u6700\u540e\uff0c\u4ee3\u7801\u6267\u884c\u65f6\u7f51\u9875\u5df2\u7ecf\u52a0\u8f7d\u5b8c\u6bd5\u4e86\uff0c\u4e0d\u4f1a\u51fa\u73b0\u65e0\u6cd5\u83b7\u53d6DOM\u5bf9\u8c61\u7684\u95ee\u9898\u3002<\/p>\n\n\n\n
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window.onload = () => {\n const btn = document.getElementById("btn")\n btn.addEventListener("click", function () {\n alert("\u6309\u94ae\u88ab\u70b9\u4e86")\n })\n}<\/code><\/pre><\/div>\n\n\n\nwindow.addEventListener("load", () => {\n const btn = document.getElementById("btn")\n btn.addEventListener("click", function () {\n alert("\u6309\u94ae\u88ab\u70b9\u4e86")\n })\n})<\/code><\/pre><\/div>\n\n\n\n\u5c06js\u4ee3\u7801\u7f16\u5199\u5230window\u7684load\u4e8b\u4ef6\u7684\u56de\u8c03\u51fd\u6570\u4e2d\uff0cload\u4e8b\u4ef6\u4f1a\u5728\u9875\u9762\u52a0\u8f7d\u5b8c\u6bd5\u540e\u89e6\u53d1\uff0c\u540c\u6837\u53ef\u4ee5\u907f\u514d\u4e0a\u8ff0\u95ee\u9898\u3002<\/p>\n\n\n\n
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<script src=".\/script.js" defer><\/script><\/code><\/pre><\/div>\n\n\n\n\u8bbe\u7f6edefer\u540e\uff0c\u811a\u672c\u5c06\u4f1a\u5728\u6587\u6863\u89e3\u6790\u4e4b\u540e\u52a0\u8f7d\uff0c\u540c\u6837\u53ef\u4ee5\u907f\u514d\u4e0a\u8ff0\u95ee\u9898\u3002\uff08\u6267\u884c\u65f6\u673a\u65e9\u4e8eDOMContentLoaded\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
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