{"id":119159,"date":"2026-10-29T01:56:46","date_gmt":"2026-10-28T17:56:46","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/119159.html"},"modified":"2026-10-29T01:56:46","modified_gmt":"2026-10-28T17:56:46","slug":"%e5%89%af%e9%98%9f%e9%95%bfjavascript%e6%95%99%e7%a8%8b50-dom%ef%bc%9a%e7%bd%91%e9%a1%b5%e5%bc%80%e5%8f%91%e7%9a%84%e8%b5%b7%e7%82%b9","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/119159.html","title":{"rendered":"\u526f\u961f\u957fJavaScript\u6559\u7a0b(50)-DOM\uff1a\u7f51\u9875\u5f00\u53d1\u7684\u8d77\u70b9"},"content":{"rendered":"<p>\u70b9\u6b64\u67e5\u770b \u6240\u6709\u6559\u7a0b\u3001\u9879\u76ee\u3001\u6e90\u7801\u5bfc\u822a<\/p>\n<\/p>\n<h4>\u6587\u7ae0\u76ee\u5f55<\/h4>\n<ul>\n<li>1. \u80cc\u666f<\/li>\n<li>2. DOM \u662f\u4ec0\u4e48<\/li>\n<li>3. document \u6587\u6863\u5bf9\u8c61<\/li>\n<li>4. \u8282\u70b9\u4ee5\u53ca\u8282\u70b9\u7684\u5206\u7c7b<\/li>\n<li>\n<ul>\n<li>4.1 \u5143\u7d20\u8282\u70b9<\/li>\n<li>4.2 \u6587\u672c\u8282\u70b9<\/li>\n<li>4.3 \u6ce8\u91ca\u8282\u70b9<\/li>\n<li>4.4 \u6587\u6863\u8282\u70b9<\/li>\n<\/ul>\n<\/li>\n<li>5. \u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb<\/li>\n<li>\n<ul>\n<li>5.1 \u7236\u8282\u70b9 parentNode<\/li>\n<li>5.2 \u5b50\u8282\u70b9 childNodes<\/li>\n<li>5.3 \u4e0a\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9 previousSibling<\/li>\n<li>5.4 \u4e0b\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9 nextSibling<\/li>\n<\/ul>\n<\/li>\n<li>6. \u8282\u70b9\u7c7b\u578b nodeType<\/li>\n<li>7. \u5c0f\u7ed3<\/li>\n<\/ul>\n<h2>1. \u80cc\u666f<\/h2>\n<p>\u524d\u9762\u6211\u4eec\u4e00\u957f\u6bb5\u5b66\u4e60\u7684\u5185\u5bb9&#xff0c;\u90fd\u5c5e\u4e8e JavaScript\u8bed\u6cd5\u57fa\u7840&#xff1a;\u53d8\u91cf\u3001\u6570\u636e\u7c7b\u578b\u3001\u8fd0\u7b97\u7b26\u3001\u5206\u652f\u3001\u5faa\u73af\u3001\u5bf9\u8c61\u3001\u5f02\u5e38\u5904\u7406\u7b49\u7b49\u3002<\/p>\n<p>\u8fd9\u4e00\u5957 JS \u8bed\u6cd5\u672c\u8eab\u662f\u8de8\u5e73\u53f0\u7684&#xff0c;\u5b83\u4e0d\u7ed1\u5b9a\u67d0\u4e00\u4e2a\u8fd0\u884c\u73af\u5883\u3002 \u540c\u6837\u7684\u8bed\u6cd5&#xff0c;\u653e\u5230\u4e0d\u540c\u73af\u5883&#xff0c;\u4f1a\u8d70\u5411\u4e0d\u540c\u6280\u672f\u65b9\u5411&#xff1a;<\/p>\n<ul>\n<li>\u5728\u6d4f\u89c8\u5668\u91cc\u9762&#xff0c;\u642d\u914d DOM\u3001BOM&#xff0c;\u505a\u7f51\u9875\u524d\u7aef\u5f00\u53d1&#xff1b;<\/li>\n<li>\u5728**Node.js&#xff08;\u670d\u52a1\u7aefJS&#xff09;**\u91cc\u9762&#xff0c;\u642d\u914d\u6587\u4ef6\u3001\u7f51\u7edc\u6a21\u5757&#xff0c;\u5199\u540e\u7aef\u63a5\u53e3\u3001\u670d\u52a1\u7a0b\u5e8f\u3001\u811a\u672c\u5de5\u5177&#xff1b;<\/li>\n<li>\u5728\u5fae\u4fe1 \/ \u652f\u4ed8\u5b9d\u5c0f\u7a0b\u5e8f&#xff0c;\u642d\u914d\u5c0f\u7a0b\u5e8f\u4e13\u5c5e API&#xff0c;\u5f00\u53d1\u79fb\u52a8\u7aef\u5c0f\u7a0b\u5e8f&#xff1b;<\/li>\n<li>\u5728 UniApp \/ Taro&#xff0c;\u4e00\u5957\u4ee3\u7801\u7f16\u8bd1\u6210 H5\u3001\u5c0f\u7a0b\u5e8f\u3001App&#xff1b;<\/li>\n<\/ul>\n<p>\u8fd9\u91cc\u987a\u5e26\u89e3\u91ca\u4e00\u4e2a\u6982\u5ff5&#xff1a;API\u3002 \u7b80\u5355\u6765\u8bf4&#xff0c;API \u5c31\u662f\u5404\u4e2a\u5e73\u53f0\u63d0\u524d\u7ed9\u6211\u4eec\u5c01\u88c5\u597d\u7684\u5bf9\u8c61\u3001\u51fd\u6570\u3001\u5de5\u5177\u5e93\u3002 JS \u672c\u8eab\u539f\u751f\u8bed\u6cd5\u6ca1\u6709\u64cd\u4f5c\u7f51\u9875\u3001\u8bfb\u5199\u6587\u4ef6\u3001\u8c03\u7528\u786c\u4ef6\u7684\u80fd\u529b&#xff0c;\u8fd9\u4e9b\u80fd\u529b\u5168\u90e8\u90fd\u662f\u5e73\u53f0\u901a\u8fc7 API \u63d0\u4f9b\u7ed9\u6211\u4eec\u7684\u3002 \u6bd4\u5982\u6d4f\u89c8\u5668\u63d0\u4f9b\u7684 document\u3001alert&#xff0c;Node.js \u63d0\u4f9b\u7684\u6587\u4ef6\u8bfb\u5199\u6a21\u5757&#xff0c;\u5c0f\u7a0b\u5e8f\u63d0\u4f9b\u7684\u626b\u7801\u3001\u5f39\u7a97\u63a5\u53e3&#xff0c;\u5168\u90e8\u90fd\u5c5e\u4e8e API\u3002<\/p>\n<p>\u8bed\u6cd5\u662f\u901a\u7528\u6839\u57fa&#xff0c;\u800c\u73af\u5883\u63d0\u4f9b\u7684 API \u662f\u5404\u4e2a\u5e73\u53f0\u72ec\u6709\u7684\u80fd\u529b\u3002 \u4ece\u672c\u7bc7\u5f00\u59cb&#xff0c;\u6211\u4eec\u5c31\u8981\u5b66\u4e60\u6d4f\u89c8\u5668\u73af\u5883\u4e0b\u7684 DOM\u3002\u628a\u524d\u9762\u638c\u63e1\u7684 JS \u8bed\u6cd5\u57fa\u7840&#xff0c;\u548c\u6d4f\u89c8\u5668\u7684 DOM \u6a21\u578b\u7ed3\u5408\u5728\u4e00\u8d77&#xff0c;\u624d\u662f\u6211\u4eec\u7f51\u9875\u524d\u7aef\u5f00\u53d1\u7684\u6b63\u5f0f\u8d77\u70b9\u3002<\/p>\n<p>\u672c\u7bc7\u5148\u641e\u61c2 DOM \u7684\u6838\u5fc3\u6982\u5ff5&#xff1a;\u6587\u6863\u3001\u8282\u70b9\u3001\u8282\u70b9\u7684\u5206\u7c7b\u3001\u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb\u3002<\/p>\n<p>\u5b9e\u9645\u4e0a&#xff0c;ECMAScript&#xff08;\u7b80\u79f0 ES&#xff09;\u662f\u4e00\u5957\u8bed\u8a00\u89c4\u8303&#xff0c;\u89c4\u5b9a\u4e86\u53d8\u91cf\u3001\u6570\u636e\u7c7b\u578b\u3001\u8fd0\u7b97\u7b26\u3001if\u3001for\u3001\u51fd\u6570\u3001\u5bf9\u8c61\u8fd9\u4e9b\u7eaf\u8bed\u6cd5\u89c4\u5219&#xff0c;\u4e0d\u5305\u542b\u4efb\u4f55\u5e73\u53f0\u4e13\u5c5e\u80fd\u529b&#xff1b;\u800c\u6211\u4eec\u5728\u6d4f\u89c8\u5668\u4e2d\u4f7f\u7528\u7684 JavaScript&#xff0c;\u5c31\u662f\u6d4f\u89c8\u5668\u5b9e\u73b0\u4e86 ES \u89c4\u8303\u4e4b\u540e&#xff0c;\u518d\u989d\u5916\u52a0\u4e0a DOM\u3001BOM \u8fd9\u7c7b\u6d4f\u89c8\u5668 API \u7ec4\u5408\u800c\u6210\u7684\u3002\u53ef\u4ee5\u7b80\u5355\u7684\u8ba4\u4e3a&#xff1a;JS&#061;ES&#043;DOM&#043;BOM<\/p>\n<h2>2. DOM \u662f\u4ec0\u4e48<\/h2>\n<p>DOM \u5168\u79f0 Document Object Model&#xff0c;\u6587\u6863\u5bf9\u8c61\u6a21\u578b\u3002<\/p>\n<p>\u6d4f\u89c8\u5668\u52a0\u8f7d HTML \u9875\u9762\u4e4b\u540e&#xff0c;\u4f1a\u628a\u6574\u4e2a HTML \u6587\u6863&#xff0c;\u8f6c\u6362\u6210\u4e00\u68f5\u7531\u8282\u70b9\u7ec4\u6210\u7684\u6811\u7ed3\u6784&#xff0c;\u8fd9\u68f5\u6811\u53eb\u505aDOM \u6811\u3002 JS \u53ef\u4ee5\u901a\u8fc7 DOM \u63d0\u4f9b\u7684\u63a5\u53e3&#xff0c;\u8bfb\u53d6\u3001\u4fee\u6539\u8fd9\u68f5\u6811\u4e0a\u7684\u8282\u70b9&#xff0c;\u4ece\u800c\u6539\u53d8\u7f51\u9875\u7684\u5c55\u793a\u6548\u679c\u3002<\/p>\n<p>\u7b80\u5355\u4e00\u53e5\u8bdd&#xff1a; DOM \u5c31\u662f JS \u64cd\u4f5c\u7f51\u9875\u7684\u4e00\u5957\u63a5\u53e3\u89c4\u8303&#xff0c;\u5b83\u662f\u6d4f\u89c8\u5668\u73af\u5883\u72ec\u6709\u7684&#xff0c;Node.js\u3001\u5fae\u4fe1\u5c0f\u7a0b\u5e8f\u91cc\u9762\u6ca1\u6709\u539f\u751f DOM\u3002<\/p>\n<h2>3. document \u6587\u6863\u5bf9\u8c61<\/h2>\n<p>document \u662f DOM \u91cc\u9762\u6700\u9876\u5c42\u7684\u5bf9\u8c61&#xff0c;\u4ee3\u8868\u6574\u4e2a HTML \u6587\u6863\u3002 \u6211\u4eec\u5e73\u65f6\u5199\u7684 html\u3001head\u3001body \u6807\u7b7e&#xff0c;\u5168\u90e8\u90fd\u5305\u88f9\u5728 document \u91cc\u9762\u3002<\/p>\n<p><span class=\"token doctype\"><span class=\"token punctuation\">&lt;!<\/span><span class=\"token doctype-tag\">DOCTYPE<\/span> <span class=\"token name\">html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta<\/span> <span class=\"token attr-name\">charset<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>UTF-8<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token script\"><span class=\"token language-javascript\"><br \/>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>document<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><span class=\"token comment\">\/\/ \u76f4\u63a5\u5728\u6d4f\u89c8\u5668\u63a7\u5236\u53f0\u6253\u5370document<\/span><br \/>\n    <\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>\u53ef\u4ee5\u770b\u5230\u63a7\u5236\u53f0\u8f93\u51fa\u5982\u4e0b&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261028175644-6ae2375cb15be.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> document \u6709\u51e0\u4e2a\u7279\u70b9&#xff1a;<\/p>\n<li>document \u662f\u6d4f\u89c8\u5668\u5185\u7f6e\u7684\u5bf9\u8c61&#xff0c;\u4e0d\u9700\u8981\u6211\u4eec\u81ea\u5df1\u521b\u5efa&#xff1b;<\/li>\n<li>\u5b83\u662f\u6574\u68f5 DOM \u6811\u7684\u6839\u5165\u53e3&#xff0c;\u6211\u4eec\u540e\u9762\u6240\u6709\u83b7\u53d6\u5143\u7d20\u7684\u65b9\u6cd5&#xff0c;\u51e0\u4e4e\u90fd\u662f\u4ece document \u5f00\u59cb\u8c03\u7528&#xff1b;<\/li>\n<li>document 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\u5c31\u662f\u6587\u672c\u8282\u70b9\u3002<\/p>\n<p>\u6ce8\u610f&#xff1a;\u6807\u7b7e\u4e4b\u95f4\u7684\u6362\u884c\u3001\u7a7a\u683c&#xff0c;\u4e5f\u4f1a\u88ab\u8bc6\u522b\u6210\u7a7a\u767d\u6587\u672c\u8282\u70b9&#xff0c;\u8fd9\u662f\u65b0\u624b\u5f88\u5bb9\u6613\u8e29\u5751\u7684\u5730\u65b9\u3002<\/p>\n<h3>4.3 \u6ce8\u91ca\u8282\u70b9<\/h3>\n<p>HTML \u6ce8\u91ca &lt;!&#8211; \u8fd9\u662f\u6ce8\u91ca &#8211;&gt;&#xff0c;\u5bf9\u5e94\u7684\u5c31\u662f\u6ce8\u91ca\u8282\u70b9\u3002 \u6ce8\u91ca\u4e0d\u4f1a\u663e\u793a\u5728\u9875\u9762\u4e0a&#xff0c;\u4f46\u662f\u5728 DOM \u6811\u4e2d\u4f9d\u7136\u5b58\u5728\u3002<\/p>\n<h3>4.4 \u6587\u6863\u8282\u70b9<\/h3>\n<p>\u5c31\u662f\u6211\u4eec\u4e0a\u9762\u8bf4\u7684 document&#xff0c;\u5b83\u662f\u6574\u68f5 DOM \u6811\u7684\u6700\u9876\u5c42\u8282\u70b9\u3002<\/p>\n<p>\u6211\u4eec\u770b\u4e00\u6bb5 HTML \u793a\u4f8b&#xff0c;\u5bf9\u7167\u7406\u89e3&#xff1a;<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token comment\">&lt;!&#8211; \u8fd9\u662f\u6ce8\u91ca &#8211;&gt;<\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\u4e00\u6bb5\u6587\u5b57<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<ul>\n<li>&lt;div&gt;&#xff1a;\u5143\u7d20\u8282\u70b9<\/li>\n<li>&lt;!&#8211; \u8fd9\u662f\u6ce8\u91ca &#8211;&gt;&#xff1a;\u6ce8\u91ca\u8282\u70b9<\/li>\n<li>&lt;p&gt;&#xff1a;\u5143\u7d20\u8282\u70b9<\/li>\n<li>\u4e00\u6bb5\u6587\u5b57&#xff1a;\u6587\u672c\u8282\u70b9<\/li>\n<\/ul>\n<h2>5. \u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb<\/h2>\n<p>DOM \u6811\u662f\u6811\u5f62\u7ed3\u6784&#xff0c;\u8282\u70b9\u4e4b\u95f4\u5b58\u5728\u7236\u5b50\u3001\u5144\u5f1f\u5173\u7cfb&#xff0c;\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7\u8282\u70b9\u5c5e\u6027\u627e\u5230\u5173\u8054\u8282\u70b9\u3002<\/p>\n<p>\u4e0b\u9762\u8fd9\u4e9b\u5c5e\u6027&#xff0c;\u662f\u8282\u70b9\u901a\u7528\u5c5e\u6027&#xff0c;\u6240\u6709\u8282\u70b9\u90fd\u53ef\u4ee5\u8bbf\u95ee\u3002<\/p>\n<h3>5.1 \u7236\u8282\u70b9 parentNode<\/h3>\n<p>parentNode \u4ee3\u8868\u5f53\u524d\u8282\u70b9\u7684\u76f4\u63a5\u7236\u8282\u70b9\u3002 \u4e00\u4e2a\u8282\u70b9\u6700\u591a\u53ea\u6709\u4e00\u4e2a\u7236\u8282\u70b9\u3002 \u9876\u5c42\u7684 document \u8282\u70b9&#xff0c;\u7236\u8282\u70b9\u662f null\u3002<\/p>\n<p><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>box<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>\u6d4b\u8bd5\u6587\u672c<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>p \u5143\u7d20\u7684 parentNode \u5c31\u662f div \u5143\u7d20\u8282\u70b9\u3002<\/p>\n<h3>5.2 \u5b50\u8282\u70b9 childNodes<\/h3>\n<p>childNodes \u83b7\u53d6\u5f53\u524d\u8282\u70b9\u4e0b\u9762\u6240\u6709\u7684\u76f4\u63a5\u5b50\u8282\u70b9&#xff0c;\u8fd4\u56de\u4e00\u4e2a\u96c6\u5408\u3002 \u91cd\u70b9&#xff1a;childNodes \u4f1a\u5305\u542b\u5143\u7d20\u8282\u70b9\u3001\u6587\u672c\u8282\u70b9\u3001\u6ce8\u91ca\u8282\u70b9&#xff0c;\u7a7a\u767d\u6362\u884c\u4e5f\u4f1a\u5f53\u6210\u6587\u672c\u8282\u70b9\u3002<\/p>\n<p>\u62ff\u4e0a\u9762\u4f8b\u5b50\u7684 box \u6765\u8bf4&#xff1a; box \u7684 childNodes \u91cc\u9762&#xff0c;\u4f1a\u5305\u542b&#xff1a;\u7a7a\u767d\u6587\u672c\u8282\u70b9\u3001\u6ce8\u91ca\u8282\u70b9\u3001\u7a7a\u767d\u6587\u672c\u8282\u70b9\u3001p \u5143\u7d20\u8282\u70b9\u3001\u7a7a\u767d\u6587\u672c\u8282\u70b9\u3002<\/p>\n<p>\u533a\u5206&#xff1a;\u540e\u9762\u6211\u4eec\u4f1a\u5b66\u5230 children&#xff0c;children \u53ea\u83b7\u53d6\u5b50\u5143\u7d20\u8282\u70b9&#xff0c;\u4f1a\u8fc7\u6ee4\u6389\u6587\u672c\u3001\u6ce8\u91ca\u8282\u70b9&#xff0c;\u5f00\u53d1\u4e2d\u66f4\u5e38\u7528\u3002<\/p>\n<h3>5.3 \u4e0a\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9 previousSibling<\/h3>\n<p>\u83b7\u53d6\u540c\u4e00\u4e2a\u7236\u8282\u70b9\u4e0b&#xff0c;\u6392\u5728\u5b83\u524d\u9762\u7684\u5144\u5f1f\u8282\u70b9\u3002 \u540c\u6837&#xff0c;\u4f1a\u62ff\u5230\u7a7a\u767d\u6587\u672c\u8282\u70b9\u3001\u6ce8\u91ca\u8282\u70b9\u3002<\/p>\n<h3>5.4 \u4e0b\u4e00\u4e2a\u5144\u5f1f\u8282\u70b9 nextSibling<\/h3>\n<p>\u83b7\u53d6\u540c\u4e00\u4e2a\u7236\u8282\u70b9\u4e0b&#xff0c;\u6392\u5728\u5b83\u540e\u9762\u7684\u5144\u5f1f\u8282\u70b9\u3002<\/p>\n<h2>6. \u8282\u70b9\u7c7b\u578b nodeType<\/h2>\n<p>\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 nodeType \u5c5e\u6027&#xff0c;\u5224\u65ad\u5f53\u524d\u662f\u54ea\u4e00\u79cd\u8282\u70b9&#xff0c;\u5b83\u8fd4\u56de\u6570\u5b57&#xff1a;<\/p>\n<ul>\n<li>1&#xff1a;\u5143\u7d20\u8282\u70b9<\/li>\n<li>3&#xff1a;\u6587\u672c\u8282\u70b9<\/li>\n<li>8&#xff1a;\u6ce8\u91ca\u8282\u70b9<\/li>\n<li>9&#xff1a;document \u6587\u6863\u8282\u70b9<\/li>\n<\/ul>\n<p>\u793a\u4f8b\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token doctype\"><span class=\"token punctuation\">&lt;!<\/span><span class=\"token doctype-tag\">DOCTYPE<\/span> <span class=\"token name\">html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta<\/span> <span class=\"token attr-name\">charset<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>UTF-8<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>box<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>hello<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token script\"><span class=\"token language-javascript\"><br \/>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>childNodes<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> node <span class=\"token keyword\">of<\/span> document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>childNodes<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">.<\/span>nodeType<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>\u5f53\u6211\u4eec\u8fd0\u884c\u5982\u4e0b\u4ee3\u7801&#xff0c;\u6548\u679c&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261028175645-6ae2375d432ec.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u8fd9\u4e2a\u5730\u65b9\u9700\u8981\u597d\u597d\u89e3\u91ca\u4e0b&#xff0c;\u5927\u90e8\u5206\u540c\u5b66\u53ef\u4ee5\u80fd\u7406\u89e3\u7684&#xff0c;body\u91cc\u9762\u53ea\u6709\u4e24\u4e2a\u5143\u7d20\u5b50\u8282\u70b9&#xff0c;\u5c31\u662fdiv\u548cscript\u5b50\u8282\u70b9&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261028175645-6ae2375d59486.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5b9e\u9645\u4e0a&#xff0c;\u5728\u548c<\/p>\n<p> \u4e4b\u524d&#xff0c;\u4ee5\u53ca<br \/>\n\u548c<\/p>\n<p>\u6240\u4ee5\u5982\u679c\u4f7f\u7528\u5982\u4e0b\u4ee3\u7801&#xff1a;<\/p>\n<p><span class=\"token doctype\"><span class=\"token punctuation\">&lt;!<\/span><span class=\"token doctype-tag\">DOCTYPE<\/span> <span class=\"token name\">html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>meta<\/span> <span class=\"token attr-name\">charset<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>UTF-8<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>title<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>head<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>div<\/span> <span class=\"token attr-name\">id<\/span><span class=\"token attr-value\"><span class=\"token punctuation attr-equals\">&#061;<\/span><span class=\"token punctuation\">&#034;<\/span>box<span class=\"token punctuation\">&#034;<\/span><\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n        <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>hello<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>p<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>div<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token script\"><span class=\"token language-javascript\"><br \/>\n        console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>childNodes<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token keyword\">for<\/span> <span class=\"token punctuation\">(<\/span><span class=\"token keyword\">let<\/span> node <span class=\"token keyword\">of<\/span> document<span class=\"token punctuation\">.<\/span>body<span class=\"token punctuation\">.<\/span>childNodes<span class=\"token punctuation\">)<\/span> <span class=\"token punctuation\">{<\/span><br \/>\n            console<span class=\"token punctuation\">.<\/span><span class=\"token function\">log<\/span><span class=\"token punctuation\">(<\/span>node<span class=\"token punctuation\">.<\/span>nodeType<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n        <span class=\"token punctuation\">}<\/span><br \/>\n    <\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>script<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>body<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>html<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>\u5219\u7ed3\u679c\u5c31\u53ea\u6709\u4e24\u4e2a\u8282\u70b9&#xff1a; <img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/10\/20261028175645-6ae2375d6f06f.png\" alt=\"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \/> \u5f53\u7136&#xff0c;\u8fd9\u6837\u5199\u6ca1\u6709\u5fc5\u8981&#xff0c;\u4ee3\u7801\u5f88\u96be\u8bfb&#xff0c;\u653e\u8fd9\u4e2a\u4f8b\u5b50\u662f\u4e3a\u4e86\u65b9\u4fbf\u5927\u5bb6\u7406\u89e3\u3002<\/p>\n<h2>7. 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