{"id":8527,"date":"2019-03-02T20:09:28","date_gmt":"2019-03-02T12:09:28","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8527"},"modified":"2019-03-02T20:09:28","modified_gmt":"2019-03-02T12:09:28","slug":"node-comparedocumentposition-api","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2019\/03\/node-comparedocumentposition-api\/","title":{"rendered":"\u6df1\u5165Node.compareDocumentPosition API"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8527\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8527<\/a><br \/>\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4e2a\u4eba\u7f51\u7ad9\u65e0\u9700\u6388\u6743\uff0c\u53ea\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\u5373\u53ef\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<br \/>\n<script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/201903-compare.jpg';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201903\/dom-cover.png\" width=\"480\" height=\"312\" alt=\"DOM\u8282\u70b9\u6811\u4f4d\u7f6e\u5bf9\u6bd4\u5934\u56fe\" class=\"alignright thumb clip size-medium\" \/><\/p>\n<h3>\u4e00\u3001\u5feb\u901f\u4e86\u89e3<\/h3>\n<p>Node.compareDocumentPosition()\u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u5bf9\u6bd4\u4e24\u4e2aHTML\u8282\u70b9\u5728\u6587\u6863\u4e2d\u7684\u4f4d\u7f6e\u5173\u7cfb\uff0c\u5305\u62ec\u524d\u540e\uff0c\u7236\u5b50\uff0c\u81ea\u8eab\u4ee5\u53ca\u8de8\u6587\u6863\u3002\u4e0d\u4ec5\u662fDOM\u8282\u70b9\uff0c\u6587\u672c\u8282\u70b9\uff0c\u6ce8\u91ca\u8282\u70b9\u751a\u81f3\u5c5e\u6027\u8282\u70b9\u7684\u4f4d\u7f6e\u5173\u7cfb\u90fd\u53ef\u4ee5\u5224\u5b9a\uff0c\u5f88\u5f3a\u3002<\/p>\n<p>IE9+\u6d4f\u89c8\u5668\u652f\u6301\uff0cIE8\u53ef\u4ee5\u501f\u52a9<code>sourceIndex<\/code>\u6765\u5224\u5b9a\u3002<\/p>\n<h3>\u4e8c\u3001\u6df1\u5165\u7406\u89e3<\/h3>\n<p><code>compareDocumentPosition<\/code>\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre>compareValue = node.compareDocumentPosition(otherNode)<\/pre>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u8fd9\u91cc\u6709\u4e2a\u5bb9\u6613\u8bb0\u4e0d\u6e05\u7684\u5730\u65b9\uff0c\u5230\u5e95\u8fd4\u56de\u7684\u4f4d\u7f6e\u5173\u7cfb\u662f<code>node<\/code>\u76f8\u5bf9\u4e8e<code>otherNode<\/code>\uff0c\u8fd8\u662f<code>otherNode<\/code>\u76f8\u5bf9\u4e8e<code>node<\/code>\u5462\uff1f\u7ed3\u679c\u5c45\u7136\u8fd4\u56de\u7684\u662f<code>otherNode<\/code>\u76f8\u5bf9\u4e8e<code>node<\/code>\u7684\u4f4d\u7f6e\uff01<\/p>\n<p>\u53ef\u80fd\u662f\u4e2d\u56fd\u6587\u5316\u548c\u5916\u56fd\u6587\u5316\u7684\u533a\u522b\u3002\u4e2d\u56fd\u6587\u5316\u5185\u655b\uff0c\u56fa\u5b88\u7737\u604b\uff0c\u5173\u6ce8\u81ea\u8eab\uff0c\u8a00\u5fc5\u543e\u5f53\u5982\u4f55\u5982\u4f55\uff1b\u5916\u56fd\u6587\u5316\u5411\u5916\uff0c\u6b66\u529b\u4fb5\u7565\uff0c\u6307\u624b\u5212\u811a\uff0c\u90fd\u662f\u4f60\u8be5\u5982\u4f55\u5982\u4f55\u3002<\/p>\n<p>\u7531\u4e8e\u8fd9\u4e9bAPI\u8bed\u6cd5\u662f\u8001\u5916\u53d1\u660e\u7684\uff0c\u6240\u4ee5\uff0c\u6982\u5ff5\u4e0a\u5c31\u6309\u7167\u8001\u5916\u7684\u8ba4\u8bc6\u6765\u7684\u3002\u8282\u70b9node\u5bf9otherNode\u53d1\u8d77\u4e86\u4e00\u4e2a\u6587\u6863\u4f4d\u7f6e\u5224\u65ad\u7684\u6311\u6218\uff0c\u6700\u7ec8\u7684\u7ed3\u679c\u4e0d\u662f\u6211\u8d62\u4e86\u6216\u6211\u8f93\u4e86\uff0c\u800c\u662f\u4f60\u8f93\u4e86\u6216\u8005\u4f60\u8d62\u4e86\u3002\u4e5f\u5c31\u662f<code>otherNode<\/code>\u4f60\u5728\u524d\u9762\uff0c<code>otherNode<\/code>\u4f60\u5728\u540e\u9762\uff0c\u8fd9\u6837\u5b50\u7684\u3002<\/p>\n<p><strong>\u8fd4\u56de\u503c<\/strong><br \/>\n<code>compareValue<\/code>\u662f\u8fd4\u56de\u503c\uff0c\u662f\u6574\u6570\u503c\uff0c\u53ef\u80fd\u7684\u503c\u5982\u4e0b\u8868\uff1a<\/p>\n<table border=\"0\" width=\"100%\" class=\"params_table\" cellspacing=\"1\">\n<thead>\n<tr>\n<th>\u4e8c\u8fdb\u5236<\/th>\n<th>\u8fd4\u56de\u503c<\/th>\n<th>\u91ca\u4e49<\/th>\n<th>\u5bf9\u5e94\u5e38\u91cf<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>000000<\/td>\n<td>0<\/td>\n<td>\u8282\u70b9\u4e00\u81f4<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<tr>\n<td>000001<\/td>\n<td>1<\/td>\n<td>\u8282\u70b9\u5728\u4e0d\u540c\u7684\u6587\u6863\uff08\u6216\u8005\u4e00\u4e2a\u5728\u6587\u6863\u4e4b\u5916\uff09<\/td>\n<td>Node.DOCUMENT_POSITION_DISCONNECTED<\/td>\n<\/tr>\n<tr>\n<td>000010<\/td>\n<td>2<\/td>\n<td>\u8282\u70b9 otherNode \u5728\u8282\u70b9 node \u4e4b\u524d<\/td>\n<td>Node.DOCUMENT_POSITION_PRECEDING<\/td>\n<\/tr>\n<tr>\n<td>000100<\/td>\n<td>4<\/td>\n<td>\u8282\u70b9 otherNode \u5728\u8282\u70b9 node \u4e4b\u540e<\/td>\n<td>Node.DOCUMENT_POSITION_FOLLOWING<\/td>\n<\/tr>\n<tr>\n<td>001000<\/td>\n<td>8<\/td>\n<td>\u8282\u70b9 otherNode \u5305\u542b\u8282\u70b9 node<\/td>\n<td>Node.DOCUMENT_POSITION_CONTAINS<\/td>\n<\/tr>\n<tr>\n<td>010000<\/td>\n<td>16<\/td>\n<td>\u8282\u70b9 otherNode \u88ab\u8282\u70b9 node \u5305\u542b<\/td>\n<td>Node.DOCUMENT_POSITION_CONTAINED_BY<\/td>\n<\/tr>\n<tr>\n<td>100000<\/td>\n<td>32<\/td>\n<td>\u7279\u5b9a\u7684\u8282\u70b9\u4f4d\u7f6e\uff0c\u4f9d\u8d56\u4e8eDOM\u5b9e\u73b0<\/td>\n<td>Node.DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC<\/td>\n<\/tr>\n<tr>\n<td>&#8211;<\/td>\n<td>\u7ec4\u5408\u503c\uff08\u598234\uff0c32+2\uff09<\/td>\n<td>\u590d\u5408\u8282\u70b9\u5173\u7cfb<\/td>\n<td>&#8211;<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u5173\u4e8e\u590d\u5408\u8282\u70b9\u5173\u7cfb\u7684\u7ec4\u5408\u8fd4\u56de\u503c\u7a0d\u540e\u5c55\u5f00\uff0c\u6211\u4eec\u5148\u5f00\u770b\u7b80\u5355\u7684\u4f4d\u7f6e\u5173\u7cfb\u719f\u6089\u4e0b\u6b64API\u3002<\/p>\n<pre><span style=\"color:green;\">\/\/ \u8fd4\u56de\u503c\u662f 0<\/span>\r\ndocument.body.compareDocumentPosition(document.body);\r\n<span style=\"color:green;\">\/\/ \u8fd4\u56de\u503c\u662f 4\uff0c&lt;body&gt;\u5728&lt;head&gt;\u540e\u9762<\/span>\r\ndocument.head.compareDocumentPosition(document.body)<\/pre>\n<p>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u770b\u4e0b\u590d\u5408\u8282\u70b9\u5173\u7cfb\u4e0b\u8fd4\u56de\u7684\u7ec4\u5408\u503c\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre><span style=\"color:green;\">\/\/ \u8fd4\u56de\u503c\u662f 10\uff0c8 + 2<\/span>\r\ndocument.body.compareDocumentPosition(document.documentElement);\r\n<span style=\"color:green;\">\/\/ \u8fd4\u56de\u503c\u662f 20\uff0c16 + 4<\/span>\r\ndocument.documentElement.compareDocumentPosition(document.body)<\/pre>\n<p>\u8fd4\u56de\u503c\u5206\u522b\u662f<code>10<\/code>\u548c<code>20<\/code>\u3002\u5176\u4e2d\uff1a<\/p>\n<ul>\n<li><code>10<\/code>\u662f<code>8+2<\/code>\u7684\u7ec4\u5408\u503c\uff0c<code>8<\/code>\u8868\u793a<code>documentElement<\/code>\u5305\u542b<code>body<\/code>\uff0c<code>2<\/code>\u8868\u793a<code>documentElement<\/code>\u5728<code>body<\/code>\u524d\u9762\u3002<\/li>\n<li><code>20<\/code>\u662f<code>16+4<\/code>\u7684\u7ec4\u5408\u503c\uff0c<code>16<\/code>\u8868\u793a<code>body<\/code>\u88ab<code>documentElement<\/code>\u5305\u542b\uff0c<code>4<\/code>\u8868\u793a<code>body<\/code>\u5728<code>documentElement<\/code>\u540e\u9762\u3002<\/li>\n<\/ul>\n<p>\u56e0\u6b64\uff0c\u6211\u4eec\u5b9e\u9645\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u4e0d\u80fd\u76f4\u63a5\u7b49\u4e8e<code>==<\/code>\u67d0\u4e2a\u5e38\u91cf\u503c\u5224\u65ad\u4f4d\u7f6e\u5173\u7cfb\uff0c\u800c\u9700\u8981\u501f\u52a9\u5176\u4ed6\u8fd0\u7b97\u7b26\uff0c\u4f8b\u5982\u4f4d\u8fd0\u7b97\u7b26<code>&amp;<\/code>\u3002\u5728JS\u4e2d\uff0c\u4e00\u4e2a<code>&<\/code>\u8868\u793a\u8fd0\u7b97\u7b26\u6309\u4f4d\u4e0e\uff0c\u5c31\u662f\u628a\u4e24\u4e2a\u4e8c\u8fdb\u5236\u6570\u6309\u6bcf\u4e00\u4f4d\u6bd4\u8f83\uff0c\u540c\u65f6\u4e3a<code>1<\/code>\u624d\u5f97<code>1<\/code>\uff0c\u53ea\u8981\u4e00\u4e2a\u4e3a<code>0<\/code>\u5c31\u4e3a<code>0<\/code>\uff0c\u6700\u7ec8\u7684\u4e8c\u8fdb\u5236\u503c\u5c31\u662f\u8fd0\u7b97\u503c\u3002<\/p>\n<p>\u4f8b\u5982\u6570\u5b57<code>2<\/code>\u548c<code>8<\/code>\u6bd4\u8f83\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201903\/2019-03-02_183617.png\" width=\"403\" height=\"277\" alt=\"2\u548c8\u7684\u4e0e\u4f4d\u8fd0\u7b97\u7ed3\u679c\" class=\"alignnone size-medium\" \/><\/p>\n<pre>2 & 8;    <span style=\"color:green;\">\/\/ \u7ed3\u679c\u662f00000\uff0c\u4e5f\u5c31\u662f0<\/span><\/pre>\n<p>\u5982\u679c\u662f\u6570\u5b57<code>2<\/code>\u548c\u6570\u5b57<code>10<\/code>\u6bd4\u8f83\u5462\uff1f\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201903\/2019-03-02_184502.png\" width=\"404\" height=\"276\" alt=\"2\u548c10\u4e0e\u6bd4\u8f83\" class=\"alignnone size-medium\" \/><\/p>\n<pre>2 & 10;    <span style=\"color:green;\">\/\/ \u7ed3\u679c\u662f00010\uff0c\u4e5f\u5c31\u662f2<\/span><\/pre>\n<p>\u7531\u4e8e<code>compareDocumentPosition<\/code>\u8fd4\u56de\u503c\u90fd\u662f\u6807\u51c6\u7684\u53ea\u67091\u4f4d\u662f1\u7684\u4e8c\u8fdb\u5236\u503c\uff0c\u56e0\u6b64\uff0c\u8981\u5224\u65ad\u524d\u540e\u6216\u8005\u5185\u5916\u8282\u70b9\u4f4d\u7f6e\u5173\u7cfb\u76f4\u63a5\u6309\u4f4d\u4e0e\uff0c\u7ed3\u679c\u4e0d\u662f0\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>if (document.body.compareDocumentPosition(document.documentElement) &amp; Node.DOCUMENT_POSITION_PRECEDING) {\r\n   <span style=\"color:green;\">\/\/ document.documentElement\u5728document.body\u524d\u9762\r\n   \/\/ ...<\/span>\r\n}<\/pre>\n<p>\u4e00\u4e2a\u5b57\u7b26<code>&amp;<\/code>\u800c\u4e0d\u662f<code>==<\/code>\u54df\u3002<\/p>\n<h3>\u4e09\u3001\u8fdb\u4e00\u6b65\u6df1\u5165<\/h3>\n<p><code>compareDocumentPosition<\/code>\u8fd8\u53ef\u4ee5\u7528\u6765\u6bd4\u5bf9HTML\u5c5e\u6027\u8282\u70b9\u7684\u524d\u540e\u4f4d\u7f6e\u5173\u7cfb\uff0c\u4f8b\u5982\u5982\u4e0bHTML\uff1a<\/p>\n<pre>&lt;img id=\"compareImg\" src=\".\/mm.jpg\" alt=\"\u793a\u610f\u56fe\"&gt;<\/pre>\n<pre>var altNode = compareImg.getAttributeNode('alt');\r\nvar srcNode = compareImg.getAttributeNode('src');\r\n<span style=\"color:green;\">\/\/ \u7ed3\u679c\u662f34 = 32 + 2<\/span>\r\nconsole.log(altNode.compareDocumentPosition(srcNode));<\/pre>\n<p>\u5982\u679cHTML\u4ee3\u7801\u4e2d\u7684<code>'src'<\/code>\u548c<code>'alt'<\/code>\u5c5e\u6027\u4f4d\u7f6e\u8c03\u6362\u4e0b\uff0c\u5982\u4e0b\uff1a<\/p>\n<pre>&lt;img id=\"compareImg\" alt=\"\u793a\u610f\u56fe\" src=\".\/mm.jpg\"&gt;<\/pre>\n<p>\u5219\u7ed3\u679c\u662f\uff1a<\/p>\n<pre><span style=\"color:green;\">\/\/ \u7ed3\u679c\u662f36 = 32 + 4<\/span>\r\nconsole.log(altNode.compareDocumentPosition(srcNode));<\/pre>\n<p><strong>\u5982\u4f55\u51fa\u73b0\u8fd4\u56de\u503c1\uff1f<\/strong><\/p>\n<p>\u5f53\u6211\u4eec\u7684\u8282\u70b9\u5728\u5185\u5b58\u4e2d\u800c\u4e0d\u518d\u6587\u6863\u9875\u9762\u4e2d\uff0c\u6216\u8005\u6211\u4eec\u7684\u8282\u70b9\u5728\u9875\u9762\u5185\u7684\u5176\u5b83iframe\u4e2d\u7684\u65f6\u5019\uff0c\u4f1a\u51fa\u73b0\u8fd4\u56de\u503c\u5305\u542b<code>1<\/code>\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><span style=\"color:green;\">\/\/ \u7ed3\u679c\u662f35 = 32 + 2 + 1<\/span>\r\ndocument.createElement('div').compareDocumentPosition(document.body)<\/pre>\n<p>\u4e5f\u5c31\u662f\u7279\u5b9a\u5b9e\u73b0\uff0832\uff09\uff0c<code>document.body<\/code>\u5728\u524d\uff082\uff09\uff0c\u4e24\u8005\u6587\u6863\u65e0\u5173\u8054\uff081\uff09\u3002<\/p>\n<p>\u53c8\u4f8b\u5982\u6211\u4eec\u76f4\u63a5<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/08\/iframe-html5-blob-code-view\/\">\u501f\u52a9Blob\u52a8\u6001\u521b\u5efa\u4e00\u4e2a\u975e\u5916\u94feiframe<\/a>\uff0c\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>var htmlIframe = '&lt;img id=\"img\" src=\"https:\/\/...\/mm.jpg\" onclick=\"console.log(this.compareDocumentPosition(window.parent.document.body))\"&gt;';\r\nvar iframe = document.createElement('iframe');\r\nvar blob = new Blob([htmlIframe], { 'type': 'text\/html'});\r\niframe.src = URL.createObjectURL(blob);\r\niframeBlob1.appendChild(iframe);<\/pre>\n<style>.log-result:not(:empty)::before{content:'\u7ed3\u679c\u662f';}.log-result{color:#cd0000;}<\/style>\n<p>\u5b9e\u65f6\u6548\u679c\u5982\u4e0b\uff0c\u70b9\u51fb\u59b9\u5b50\u56fe\u7247\uff0c\u770b\u770b\u8f93\u51fa\u7684\u7ed3\u679c\u662f\uff1f<span id=\"logResult\" class=\"log-result\"><\/span><\/p>\n<div id=\"iframeBlob1\"><\/div>\n<p><script>if (window.Blob){\nvar htmlIframe = '<img decoding=\"async\" id=\"img\" src=\"https:\/\/image.zhangxinxu.com\/image\/study\/s\/s128\/mm.jpg\" alt=\"\u5176\u4ed6\u6587\u6863\u56fe\u7247\" onclick=\"console.log(this.compareDocumentPosition(window.parent.document.body));window.parent.logResult.innerHTML=this.compareDocumentPosition(window.parent.document.body);\">';\nvar iframe = document.createElement('iframe');\nvar blob = new Blob([htmlIframe], { 'type': 'text\/html'});\niframe.src = URL.createObjectURL(blob);\niframeBlob1.appendChild(iframe);}<\/script><\/p>\n<p>\u7ed3\u679c\u662f35\uff0832 + 2 + 1\uff09\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201903\/2019-03-02_192611.png\" width=\"584\" height=\"62\" alt=\"\u4f4d\u7f6e\u662f35\" class=\"alignnone size-medium\" \/><\/p>\n<h3>\u56db\u3001\u5e94\u7528\u573a\u666f<\/h3>\n<p>\u4ec0\u4e48\u65f6\u5019\u6211\u4eec\u9700\u8981\u77e5\u9053\u8282\u70b9\u7684\u524d\u540e\u4f4d\u7f6e\u5173\u7cfb\u5462\uff1f\u5728\u4e00\u4e9banimation+\u7edd\u5bf9\u5b9a\u4f4d\u5b9e\u73b0\u7684slide\u9875\u9762\u8fc7\u573a\u7684\u573a\u666f\u4e0b\uff0c\u7531\u4e8e\u56de\u5230\u4e4b\u524d\u9875\u9762\u7684slide\u65b9\u5411\u662f\u76f8\u53cd\u7684\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7\u8282\u70b9\u7684\u524d\u540e\u4f4d\u7f6e\u5173\u7cfb\u5224\u65ad\u9875\u9762\u662f\u4ece\u53f3\u5f80\u5de6\u51fa\u53bb\uff0c\u8fd8\u662f\u4ece\u5de6\u5f80\u53f3\u51fa\u53bb\u3002<\/p>\n<p>\u4f8b\u5982<a href=\"https:\/\/www.zhangxinxu.com\/GitHub\/mobilebone\/test\/complex\/index.html#&#038;pageHome\" rel=\"noopener\" class=\"a_link\" target=\"_blank\">\u8fd9\u4e2ademo\u9875\u9762<\/a>\uff0c\u70b9\u51fb\u5e95\u90e8\u7684\u9009\u9879\u5361\uff0c\u53ef\u4ee5\u770b\u5230\u4e0d\u540c\u7684\u8fc7\u573a\u65b9\u5411\uff0c\u5c31\u662f\u501f\u52a9compareDocumentPosition\u65b9\u6cd5\u5224\u65ad\u7684\u3002<\/p>\n<p>\u4e5f\u53ef\u4ee5\u70b9\u51fb\u4e0b\u9762\u7684\u89c6\u9891\u4f53\u9a8c\uff1a<\/p>\n<p><video src=\"https:\/\/image.zhangxinxu.com\/video\/blog\/201903\/slide-direction.mp4\" type=\"video\/mp4\" width=\"314\" height=\"566\" preload=\"auto\" autoplay autobuffer loop x-webkit-airplay=\"allow\" x5-video-player-type=\"h5\" x5-video-player-fullscreen=\"true\" x5-video-orientation=\"portraint\" webkit-playsinline=\"true\" playsinline=\"true\" 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loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f468-200d-1f4bb.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8527\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8527<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201903\/dom-cover.png\" width=\"160\" height=\"104\" alt=\"DOM\u8282\u70b9\u6811\u4f4d\u7f6e\u5bf9\u6bd4\u5934\u56fe\" class=\"alignright size-medium\" 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