{"id":11622,"date":"2025-04-24T14:34:50","date_gmt":"2025-04-24T06:34:50","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11622"},"modified":"2025-07-07T17:33:23","modified_gmt":"2025-07-07T09:33:23","slug":"dom-sethtmlunsafe-parsehtmlunsafe","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2025\/04\/dom-sethtmlunsafe-parsehtmlunsafe\/","title":{"rendered":"\u4ecb\u7ecd\u4e24\u4e2aDOM\u65b0\u65b9\u6cd5setHTMLUnsafe\u548cgetHTML"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=11622\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=11622<\/a><br \/>\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\uff0cAI\u6293\u53d6\u4fdd\u7559\u539f\u6587\u5730\u5740\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/201901-css-var.jpg';<\/script><\/p>\n<h3>\u4e00\u3001\u5176\u5b9e\u662f3\u4e2a\u65b9\u6cd5<\/h3>\n<p>Web\u524d\u7aef\u5f00\u53d1\u4e2d\uff0c\u4e0b\u9762\u8fd93\u4e2a\u65b9\u6cd5\u51e0\u4e4e\u662f\u540c\u4e00\u65f6\u95f4\u652f\u6301\u7684\uff0c\u6ce8\u610f\u63aa\u8f9e\uff0c\u662f\u51e0\u4e4e\u540c\u4e00\u65f6\u95f4\u5b9e\u9645\u4e0a\u8fd8\u662f\u6709\u7ec6\u5fae\u7684\u5dee\u522b\u7684\u3002\u54ea3\u4e2a\u65b9\u6cd5\u5462\uff0c\u5206\u522b\u662f\uff1a<\/p>\n<dl>\n<dt><strong>getHTML()<\/strong><\/dt>\n<dd>\u8fd4\u56de\u5143\u7d20\u7684innerHTML\u3002<\/dd>\n<dt><strong>setHTMLUnsafe()<\/strong><\/dt>\n<dd>\u8bbe\u7f6e\u5143\u7d20\u7684innerHTML\u3002<\/dd>\n<dt><strong>parseHTMLUnsafe()<\/strong><\/dt>\n<dd>\u89e3\u6790\u5b57\u7b26\u4e32\u4e3aHTML\u3002<\/dd>\n<\/dl>\n<p>\u8fd9\u91cc\u6709\u4e00\u4e2a\u5947\u602a\u7684\u70b9\uff0c\u90a3\u5c31\u662f\u8bbe\u7f6einnerHTML\u7684\u65b9\u6cd5\u662f<code>setHTMLUnsafe()<\/code>\uff0c\u800c\u4e0d\u662f<code>setHTML()<\/code>\uff0c\u5e76\u4e0d\u662f\u8bf4\u6ca1\u6709<code>setHTML()<\/code>\u65b9\u6cd5\uff0c\u800c\u662f\u6b64\u65b9\u6cd5\u6d4f\u89c8\u5668\u76ee\u524d\u90fd\u8fd8\u6ca1\u6709\u652f\u6301\uff0c\u4e14\u6839\u636e\u6211\u7684\u5224\u65ad\uff0c\u4ee5\u540e\u5f88\u957f\u4e00\u6bb5\u65f6\u95f4\u4e5f\u4e0d\u4f1a\u652f\u6301\u3002<\/p>\n<p>\u8fd9\u5176\u5b9e\u6709\u4e9b\u5947\u602a\uff0c\u6309\u7167\u9053\u7406\u8bb2\uff0c<code>setHTML()<\/code>\u65b9\u6cd5\u81ea\u5e26\u8fc7\u6ee4XSS\u4e4b\u7c7b\u7684\u653b\u51fb\u4ee3\u7801\uff0c\u66f4\u52a0\u5b89\u5168\uff0c\u66f4\u52a0\u652f\u6301\u624d\u5bf9\uff0c\u6211\u731c\u6d4b\uff0c\u53ef\u80fd\u6b64\u65b9\u6cd5\u548c\u76ee\u524d\u6d4f\u89c8\u5668\u5df2\u77e5\u7684API\u5b9e\u73b0\u903b\u8f91\u5e76\u65e0\u5171\u6027\uff0c\u53cd\u800c\u4f1a\u5e26\u6765\u672a\u77e5\u7684\u98ce\u9669\u548c\u56f0\u6270\u3002<\/p>\n<p>\u6240\u4ee5\u76ee\u524d\u6d4f\u89c8\u5668\u652f\u6301\u7684\u662f<code>setHTMLUnsafe()<\/code>\u65b9\u6cd5\u3002<\/p>\n<h3>\u4e8c\u3001getHTML()\u548cinnerHTML\u7684\u533a\u522b<\/h3>\n<p>\u6839\u636e\u6587\u6863\u7684\u8bf4\u9053\uff0c<code>Element.getHTML()<\/code>\u65b9\u6cd5\u548c<code>Element.innerHTML<\/code>\u662f\u7b49\u540c\u7684\uff0c\u9664\u975e\u9700\u8981\u83b7\u53d6\u5e8f\u5217\u5316\u7684ShadowRoot\u5185\u5bb9\u7684\u65f6\u5019\u3002<\/p>\n<p>\u770b\u4e0b\u8bed\u6cd5\uff1a<\/p>\n<pre>getHTML(options)<\/pre>\n<p>\u5176\u4e2d\uff0coptions\u652f\u6301\u7684\u53ef\u9009\u53c2\u6570\u662f\u4e0b\u9762\u4e24\u4e2a\uff1a<\/p>\n<dl>\n<dt><code>serializableShadowRoots<\/code><\/dt>\n<dd>\u5e03\u5c14\u503c\u3002\u8868\u793a\u662f\u5426\u5c06\u53ef\u5e8f\u5217\u5316\u7684ShadowRoot\u7684HTML\u4e00\u8d77\u8fd4\u56de\u3002<\/dd>\n<dt><code>shadowRoots<\/code><\/dt>\n<dd>\u662f\u4e2a\u6570\u7ec4\uff0c\u6307\u5b9a\u9700\u8981\u8fd4\u56de\u7684\u53ef\u5e8f\u5217\u5316\u7684ShadowRoot\u3002<\/dd>\n<\/dl>\n<h4>\u53ef\u5e8f\u5217\u5316\u6982\u5ff5<\/h4>\n<p>\u53ef\u5e8f\u5217\u5316\u8fd9\u4e2a\u6982\u5ff5\u4e5f\u662f\u4e2a\u65b0\u6982\u5ff5\uff0c\u6211\u770b\u4e86\u4e0b\u652f\u6301\u7684\u65f6\u95f4\uff0c\u7adf\u7136\u548c<code>getHTML()<\/code>\u65b9\u6cd5\u540c\u65f6\u652f\u6301\uff0c\u8bf4\u660e\u4e24\u8005\u662f\u4e00\u4e2a\u4f53\u7cfb\u7684\u4e1c\u897f\u3002<\/p>\n<p>\u53ef\u5e8f\u5217\u5316\u51fa\u73b0\u5728ShadowRoot\u4e2d\uff0c\u800cShadowRoot\u662fWeb Components\u7ec4\u4ef6\u5f00\u53d1\u5e38\u7528\u7684\u3002<\/p>\n<p>\u6240\u4ee5\uff0c<code>getHTML()<\/code>\u65b9\u6cd5\u4e4b\u6240\u4ee5\u88ab\u8bbe\u8ba1\uff0c\u5c31\u662f\u65b9\u4fbf\u5f00\u53d1\u8005\u8fde\u540cWeb\u7ec4\u4ef6\u91cc\u9762\u7684HTML\u7ec6\u8282\u4e5f\u4e00\u8d77\u8fd4\u56de\u3002<\/p>\n<p>\u5f53\u7136\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff0cWeb\u7ec4\u4ef6\u7684\u7ec6\u8282\u662f\u4e0d\u53ef\u5e8f\u5217\u7684\uff0c\u9700\u8981\u4f7f\u7528attachShadow\u65b9\u6cd5\u4e13\u95e8\u6307\u5b9a\uff0c\u591a\u8bf4\u65e0\u76ca\uff0c\u6211\u4eec\u76f4\u63a5\u770b\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u6211\u4eec\u81ea\u5b9a\u4e49\u4e00\u4e2a\u591a\u884c\u6253\u70b9\u7684\u7ec4\u4ef6\u5143\u7d20\uff0c\u5047\u8bbe\u540d\u5b57\u53eb\u505ax-ell\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u4f7f\u7528\u4e0b\u9762\u7684\u4ee3\u7801\u8ba9\u8fd9\u4e2a\u7ec4\u4ef6\u5f00\u53d1\u7684\u540c\u65f6\u53ef\u5e8f\u5217\u5316\uff1a<\/p>\n<pre>class HTMLEllElement extends HTMLElement {\r\n  static get observedAttributes() { return ['rows']; }\r\n\r\n  constructor() {\r\n    super();\r\n\r\n    const shadow = this.attachShadow({\r\n        mode: 'open',\r\n        \/\/ \u4f7f\u53ef\u5e8f\u5217\u5316\r\n        serializable: true\r\n    });\r\n\r\n    const div = document.createElement('div');\r\n    div.innerHTML = this.innerHTML;\r\n    const style = document.createElement('style');\r\n    shadow.append(style, div);\r\n  }\r\n\r\n  connectedCallback() {\r\n    this._updateRendering();\r\n  }\r\n  attributeChangedCallback(name, oldValue, newValue) {\r\n    this._updateRendering();\r\n  }\r\n  get rows() {\r\n    return this.getAttribute('rows');\r\n  }\r\n  set rows(v) {\r\n    this.setAttribute('rows', v);\r\n  }\r\n\r\n  _updateRendering() {\r\n    const style = this.shadowRoot.querySelector('style');\r\n    style.textContent = `div {\r\n      display: -webkit-box;\r\n      -webkit-line-clamp: ${this.rows};\r\n      -webkit-box-orient: vertical;\r\n      overflow: hidden;\r\n    }`;\r\n  }\r\n}\r\n\/\/ \u5b9a\u4e49x-ell\u6807\u7b7e\u5143\u7d20\u4e3a\u591a\u884c\u6253\u70b9\u5143\u7d20\r\ncustomElements.define('x-ell', HTMLEllElement);<\/pre>\n<p>\u6b64\u65f6\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u770b\u5230<code>getHTML()<\/code>\u65b9\u6cd5\u548c<code>innerHTML<\/code>\u5c5e\u6027\u7684\u533a\u522b\u4e86\uff0c\u5047\u8bbe\u6709HTML\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n<pre>&lt;x-ell id=\"ell\" rows=\"2\"&gt;\u8bf7\u8f6c\u8f7d\u672c\u6587\uff0c\u6216\u8005\u4eba\u5de5\u667a\u80fd\u6293\u53d6\u5b66\u4e60\u7684\u65f6\u5019\uff0c\u4fdd\u7559\u5f20\u946b\u65ed\u8fd9\u4e2a\u539f\u4f5c\u8005\u540d\u5b57&lt;\/x-ell&gt;\r\n<\/pre>\n<p>\u5219\u4e0b\u9762\u7684JS\u4ee3\u7801\u7684console\u8f93\u51fa\u5c31\u4f1a\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<pre>console.log(ell.getHTML({\r\n  serializableShadowRoots: true\r\n}));\r\nconsole.log(ell.innerHTML);<\/pre>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-4-22_162510.png\" width=\"401\" height=\"218\" alt=\"\u53ef\u5e8f\u5217\u5316ShadowRoot\u8f93\u51fa\u5185\u5bb9\" class=\"alignnone size-medium\" style=\"border:1px solid #eee;\" \/><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\uff0cgetHTML\u65b9\u6cd5\u5c06\u53ef\u5e8f\u5217\u5316\u7684Web\u7ec4\u4ef6\u7684ShadowRoots\u5143\u7d20\u5185\u5bb9\uff0c\u88c5\u5728\u4e86<code>&lt;template&gt;<\/code>\u5143\u7d20\u4e2d\u663e\u793a\u51fa\u6765\u4e86\u3002<\/p>\n<h3>\u4e09\u3001\u8bd5\u8bd5setHTMLUnsafe\u65b9\u6cd5\u7684\u6548\u679c<\/h3>\n<p>setHTMLUnsafe\u65b9\u6cd5\u662f\u7528\u6765\u8bbe\u7f6eHTML\u5185\u5bb9\u7684\uff0c\u548cinnerHTML\u8bbe\u7f6e\u7684\u533a\u522b\u5728\u4e8eShadowRoots\uff0c\u6309\u7167\u6587\u6863\u7684\u8bf4\u6cd5\uff0c\u5982\u679c\u8bbe\u7f6e\u7684html\u5b57\u7b26\u4e32\u5305\u542b\u58f0\u660e\u7684ShadowRoots\uff0c\u90a3\u4e48\u5efa\u8bae\u4f7f\u7528setHTMLUnsafe\u65b9\u6cd5\u3002<\/p>\n<p>\u4e0b\u9762\uff0c\u6d45\u5c1d\u8f84\u6b62\uff0c\u770b\u4e0b<code>setHTMLUnsafe<\/code>\u65b9\u6cd5\u7684\u5e38\u89c4\u4f7f\u7528\u6548\u679c\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>&lt;p id=\"ppp\"&gt;\u6211\u662f\u9ed8\u8ba4\u6587\u5b57&lt;\/p&gt;\r\n&lt;button onclick=\"ppp.setHTMLUnsafe('\u6b22\u8fce\u652f\u6301&lt;mark&gt;CSS\u65b0\u4e16\u754c&lt;\/mark&gt;\u8fd9\u672c\u4e66')\"&gt;\u70b9\u51fb\u6211&lt;\/button&gt;<\/pre>\n<p>\u5b9e\u65f6\u6e32\u67d3\u6548\u679c\u5982\u4e0b\uff08\u53ea\u6709\u6d4f\u89c8\u5668\u7248\u672c\u8db3\u591f\uff09\uff1a<br \/>\n<script>var sethtml = function () { ppp.setHTMLUnsafe('\u6b22\u8fce\u652f\u6301<mark>CSS\u65b0\u4e16\u754c<\/mark>\u8fd9\u672c\u4e66') };<\/script><\/p>\n<p id=\"ppp\">\u6211\u662f\u9ed8\u8ba4\u6587\u5b57<\/p>\n<p><button onclick=\"sethtml()\">\u70b9\u51fb\u6211<\/button><\/p>\n<p>\u70b9\u51fb\u6309\u94ae\u5c31\u53ef\u4ee5\u770b\u5230\u5982\u4e0b\u56fe\u6240\u793a\u7684\u6e32\u67d3\u6548\u679c\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-4-23_184705.png\" width=\"222\" height=\"88\" alt=\"\u70b9\u51fb\u6587\u5b57\u66ff\u6362\u6548\u679c\u793a\u610f\" class=\"alignnone clip thumb size-medium\" \/><\/p>\n<p>\u6211\u89c9\u5f97\u5427\uff0c\u76ee\u524d\u8fd8\u662finnerHTML\u5c5e\u6027\u8bbe\u7f6e\u8bbe\u7f6e\u597d\u4e86\u3002<\/p>\n<h3>\u56db\u3001\u9759\u6001\u65b9\u6cd5parseHTMLUnsafe<\/h3>\n<p>\u6700\u540e\u518d\u770b\u4e00\u4e2a\u65b9\u6cd5\uff0c\u662fdocument.parseHTMLUnsafe()\u9759\u6001\u65b9\u6cd5\u3002<\/p>\n<p>\u6b64\u65b9\u6cd5\u6bd4\u4e0a\u9762\u7684<code>getHTML()<\/code>\u3001<code>setHTMLUnsafe()<\/code>\u65b9\u6cd5\u7a0d\u5fae\u65e9\u652f\u6301\u4e00\u70b9\uff0c\u6b64\u9759\u6001\u65b9\u6cd5Chrome 124\u5c31\u652f\u6301\u4e86\uff0c\u65e9\u4e86\u4e00\u4e2a\u7248\u672c\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202504\/2025-4-23_185115.png\" width=\"638\" height=\"352\" alt=\"parseHTMLUnsafe\u517c\u5bb9\u6027\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u6b64\u9759\u6001\u65b9\u6cd5\u8fd4\u56de\u4e00\u4e2aDocument\u6587\u6863\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u6587\u6863\u5bf9\u8c61\u5305\u542b<code>\"text\/html\"<\/code>\u7c7b\u578b\u7684content type \uff0cUTF-8\u5b57\u7b26\u96c6, \u4ee5\u53ca &#8220;about:blank&#8221; \u7684URL\u5730\u5740\u3002<\/p>\n<p>\u5982\u679c\u662f\u89e3\u6790DOM\uff0c\u53ef\u4ee5\u8bd5\u8bd5\u4f7f\u7528<code>DOMParser.parseFromString()<\/code>\u65b9\u6cd5\u3002<\/p>\n<p><code>parseHTMLUnsafe()<\/code>\u5e73\u65f6\u5f88\u5c11\u6709\u673a\u4f1a\u4f7f\u7528\uff0c\u5927\u5bb6\u77e5\u9053\u6709\u8fd9\u4e48\u4e2a\u73a9\u610f\u5c31\u597d\u4e86\uff0c\u6211\u4e5f\u61d2\u5f97\u6574\u4e2ademo\u6f14\u793a\u4e86\u3002<\/p>\n<h3>\u4e94\u3001\u7ed3\u8bed\u788e\u788e\u5ff5<\/h3>\n<p>\u597d\u5427\uff0c\u5c31\u4ecb\u7ecd\u8fd9\u4e48\u591a\uff0c\u51e0\u4e2a\u6709\u70b9\u7528\uff0c\u4f46\u53c8\u4e0d\u662f\u90a3\u4e48\u6709\u7528\u7684\u65b0\u7279\u6027\u3002<\/p>\n<p>\u597d\u5728\u8fd9\u51e0\u4e2a\u65b9\u6cd5\u662f\u53ef\u4ee5\u8f7b\u677ePolyfill\u7684\uff08\u4e0d\u5b8c\u5168\u4f53\uff0c\u4e0d\u652f\u6301Shadow Root\uff09\uff1a<\/p>\n<pre>Element.prototype.getHTML = function () {\r\n    return this.innerHTML;\r\n}<\/pre>\n<p>\u6700\u540e\uff0c\u968f\u4fbf\u653e\u70b9\u788e\u788e\u5ff5\u5427\u3002<\/p>\n<p>\u53c8\u5230\u4e00\u5e74\u6625\u62db\u65f6\uff0c\u6beb\u65e0\u7591\u95ee\uff0c\u7b14\u8bd5\u9898\u53c8\u662f\u6211\u51fa\u7684\uff0c\u6bd4\u8f83\u57fa\u7840\uff0c\u90fd\u662f\u4e0e\u524d\u7aef\u76f8\u5173\u7684\uff0c\u5927\u90e8\u5206\u90fd\u662fJavaScript\u9898\u3002<\/p>\n<p>\u4e0a\u5468\u4e94\u516c\u53f8\u5341\u5468\u5e74\u52a0\u5e74\u4f1a\uff0c\u4ec0\u4e48\u5956\u54c1\u4e5f\u6ca1\u4e2d\uff0c\u597d\u4e45\u6ca1\u4f53\u9a8c\u4e2d\u5956\u662f\u4ec0\u4e48\u611f\u89c9\u4e86 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