{"id":171077,"date":"2024-05-08T17:21:14","date_gmt":"2024-05-08T09:21:14","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/171077.html"},"modified":"2024-05-08T17:21:18","modified_gmt":"2024-05-08T09:21:18","slug":"javascript-dom%e9%ab%98%e7%ba%a7%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/171077.html","title":{"rendered":"JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1"},"content":{"rendered":"

\"JavaScript<\/p>\n

JavaScript DOM\uff08Document Object Model\uff09\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u662f\u4f7f\u7528JavaScript\u5bf9HTML\u548cXML\u6587\u6863\u8fdb\u884c\u64cd\u4f5c\u7684\u6838\u5fc3\u6280\u672f\u4e4b\u4e00\u3002\u5b83\u5141\u8bb8\u7a0b\u5e8f\u548c\u811a\u672c\u52a8\u6001\u5730\u8bbf\u95ee\u548c\u66f4\u65b0\u6587\u6863\u7684\u5185\u5bb9\u3001\u7ed3\u6784\u4ee5\u53ca\u6837\u5f0f\u3002\u5173\u952e\u6280\u672f\u548c\u65b9\u6cd5\u5305\u62ec\u8282\u70b9\u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u3001\u52a8\u753b\u4e0e\u6548\u679c\u5236\u4f5c\u3001\u6027\u80fd\u4f18\u5316\u3001\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u5904\u7406<\/strong>\u3002\u5b83\u4eec\u5171\u540c\u6784\u5efa\u4e86\u4e30\u5bcc\u7684\u4ea4\u4e92\u5f0fWeb\u5e94\u7528\u7684\u57fa\u7840\u3002<\/p>\n<\/p>\n

\u8282\u70b9\u64cd\u4f5c<\/strong>\u5c24\u5176\u662fDOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u4e2d\u7684\u57fa\u77f3\u3002\u5b83\u6d89\u53ca\u5230\u5bf9\u6587\u6863\u4e2d\u7684\u5404\u79cd\u5143\u7d20\uff08\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u5143\u7d20\u8282\u70b9\u3001\u6587\u672c\u8282\u70b9\u3001\u5c5e\u6027\u8282\u70b9\u7b49\uff09\u7684\u67e5\u627e\u3001\u6dfb\u52a0\u3001\u5220\u9664\u3001\u4fee\u6539\u7b49\u64cd\u4f5c\u3002\u8282\u70b9\u64cd\u4f5c\u662f\u5b9e\u73b0\u52a8\u6001\u5185\u5bb9\u663e\u793a\u3001\u7528\u6237\u754c\u9762\u66f4\u65b0\u7b49\u4efb\u52a1\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u73af\u3002\u7406\u89e3\u548c\u638c\u63e1DOM\u6811\u7684\u7ed3\u6784\u3001\u8282\u70b9\u4e4b\u95f4\u7684\u5173\u7cfb\u53ca\u5176\u64cd\u4f5cAPI\uff0c\u662f\u5f00\u53d1\u9ad8\u6548\u3001\u53ef\u7ef4\u62a4\u7684Web\u5e94\u7528\u7684\u524d\u63d0\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u8282\u70b9\u64cd\u4f5c<\/h2>\n<\/p>\n

\u67e5\u627e\u8282\u70b9<\/h3>\n<\/p>\n

\u67e5\u627e\u8282\u70b9\u662fDOM\u7f16\u7a0b\u4e2d\u6700\u5e38\u89c1\u7684\u64cd\u4f5c\u4e4b\u4e00\u3002\u901a\u5e38\u4f7f\u7528getElementById<\/code>\u3001getElementsByClassName<\/code>\u3001getElementsByTagName<\/code>\u4ee5\u53ca\u66f4\u4e3a\u73b0\u4ee3\u7684querySelector<\/code>\u548cquerySelectorAll<\/code>\u65b9\u6cd5\u6765\u9009\u62e9\u5355\u4e2a\u6216\u591a\u4e2a\u8282\u70b9\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4f7f\u5f97\u8bbf\u95ee\u548c\u64cd\u4f5c\u6587\u6863\u7ed3\u6784\u4e2d\u7684\u7279\u5b9a\u90e8\u5206\u6210\u4e3a\u53ef\u80fd\u3002<\/p>\n<\/p>\n

\u521b\u5efa\u548c\u4fee\u6539\u8282\u70b9<\/h3>\n<\/p>\n

\u521b\u5efa\u65b0\u8282\u70b9\u901a\u5e38\u4f7f\u7528document.createElement<\/code>\u65b9\u6cd5\uff0c\u800c\u521b\u5efa\u6587\u672c\u8282\u70b9\u5219\u4f7f\u7528document.createTextNode<\/code>\u65b9\u6cd5\u3002\u4e00\u65e6\u521b\u5efa\u4e86\u8282\u70b9\uff0c\u53ef\u4ee5\u4f7f\u7528appendChild<\/code>\u6216insertBefore<\/code>\u65b9\u6cd5\u5c06\u5176\u63d2\u5165\u5230DOM\u6811\u4e2d\u7684\u9002\u5f53\u4f4d\u7f6e\u3002\u6b64\u5916\uff0c\u4fee\u6539\u8282\u70b9\u7684\u5c5e\u6027\u6216\u5176\u6587\u672c\u5185\u5bb9\uff0c\u4f7f\u7528setAttribute<\/code>\u65b9\u6cd5\u6216\u76f4\u63a5\u64cd\u4f5c\u8282\u70b9\u7684textContent<\/code>\u5c5e\u6027\u5747\u53ef\u5b9e\u73b0\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u4e8b\u4ef6\u5904\u7406<\/h2>\n<\/p>\n

\u4e8b\u4ef6\u7ed1\u5b9a<\/h3>\n<\/p>\n

\u4e8b\u4ef6\u5904\u7406\u662f\u4ea4\u4e92\u5f0fWeb\u5e94\u7528\u7684\u6838\u5fc3\uff0c\u5141\u8bb8\u54cd\u5e94\u7528\u6237\u884c\u4e3a\u3002\u4e8b\u4ef6\u7ed1\u5b9a\u5305\u62ec\u76f4\u63a5\u5728HTML\u5143\u7d20\u4e0a\u7ed1\u5b9a\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\uff0c\u4ee5\u53ca\u4f7f\u7528addEventListener<\/code>\u65b9\u6cd5\u52a8\u6001\u7ed1\u5b9a\u3002\u540e\u8005\u66f4\u52a0\u7075\u6d3b\u3001\u5f3a\u5927\uff0c\u652f\u6301\u4e3a\u540c\u4e00\u4e2a\u4e8b\u4ef6\u7ed1\u5b9a\u591a\u4e2a\u76d1\u542c\u5668\uff0c\u4e14\u6613\u4e8e\u5b9e\u73b0\u4e8b\u4ef6\u59d4\u6258\u3002<\/p>\n<\/p>\n

\u4e8b\u4ef6\u59d4\u6258<\/h3>\n<\/p>\n

\u4e8b\u4ef6\u59d4\u6258\u662f\u4e00\u79cd\u9ad8\u6548\u5904\u7406\u4e8b\u4ef6\u7684\u6a21\u5f0f\uff0c\u7279\u522b\u662f\u5728\u5904\u7406\u5927\u91cf\u5143\u7d20\u7684\u4e8b\u4ef6\u65f6\u3002\u901a\u8fc7\u5728\u7236\u5143\u7d20\u4e0a\u76d1\u542c\u4e8b\u4ef6\uff0c\u5229\u7528\u4e8b\u4ef6\u5192\u6ce1\u7684\u7279\u6027\uff0c\u6765\u63a7\u5236\u5b50\u5143\u7d20\u7684\u4e8b\u4ef6\u54cd\u5e94\uff0c\u8fd9\u6837\u53ef\u4ee5\u51cf\u5c11\u4e8b\u4ef6\u76d1\u542c\u5668\u7684\u6570\u91cf\uff0c\u63d0\u9ad8\u7a0b\u5e8f\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u4e09\u3001\u52a8\u753b\u4e0e\u6548\u679c\u5236\u4f5c<\/h2>\n<\/p>\n

\u5b9e\u73b0\u52a8\u753b<\/h3>\n<\/p>\n

\u5b9e\u73b0\u52a8\u753b\u6548\u679c\u53ef\u4ee5\u901a\u8fc7\u7eafJavaScript\u6216CSS3\u52a8\u753b\u4e24\u79cd\u65b9\u5f0f\u3002JavaScript\u52a8\u753b\u6d89\u53ca\u5230\u901a\u8fc7\u5b9a\u65f6\u5668setInterval<\/code>\u6216\u66f4\u73b0\u4ee3\u7684requestAnimationFrame<\/code>\uff0c\u52a8\u6001\u4fee\u6539\u5143\u7d20\u7684\u6837\u5f0f\u5c5e\u6027\u3002CSS3\u52a8\u753b\u5219\u662f\u5b9a\u4e49\u5173\u952e\u5e27\u548c\u52a8\u753b\u5c5e\u6027\uff0c\u6d4f\u89c8\u5668\u4f1a\u81ea\u52a8\u6267\u884c\u52a8\u753b\u6548\u679c\u3002<\/p>\n<\/p>\n

\u8fd0\u52a8\u6846\u67b6<\/h3>\n<\/p>\n

\u5bf9\u4e8e\u590d\u6742\u7684\u52a8\u753b\u548c\u6548\u679c\uff0c\u5f00\u53d1\u8005\u901a\u5e38\u4f1a\u4f7f\u7528\u5404\u79cdJavaScript\u52a8\u753b\u5e93\uff0c\u5982GreenSock Animation Platform (GSAP)\u3001jQuery\u7684animate<\/code>\u65b9\u6cd5\u7b49\u3002\u8fd9\u4e9b\u6846\u67b6\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u52a8\u753b\u6548\u679c\u3001\u66f4\u52a0\u7cbe\u7ec6\u7684\u63a7\u5236\u4ee5\u53ca\u66f4\u9ad8\u7684\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u56db\u3001\u6027\u80fd\u4f18\u5316<\/h2>\n<\/p>\n

DOM\u64cd\u4f5c\u4f18\u5316<\/h3>\n<\/p>\n

DOM\u64cd\u4f5c\u662f\u6602\u8d35\u7684\uff0c\u9891\u7e41\u7684\u64cd\u4f5c\u5c06\u5f71\u54cdWeb\u5e94\u7528\u7684\u6027\u80fd\u3002\u4f18\u5316\u7b56\u7565\u5305\u62ec\u5c3d\u53ef\u80fd\u51cf\u5c11DOM\u64cd\u4f5c\u6b21\u6570\uff0c\u4f7f\u7528\u6587\u6863\u7247\u6bb5DocumentFragment<\/code>\u8fdb\u884c\u6279\u91cf\u8282\u70b9\u64cd\u4f5c\uff0c\u4ee5\u53ca\u907f\u514d\u5728\u5faa\u73af\u4e2d\u64cd\u4f5cDOM\u3002<\/p>\n<\/p>\n

\u4e8b\u4ef6\u5904\u7406\u4f18\u5316<\/h3>\n<\/p>\n

\u5bf9\u4e8e\u4e8b\u4ef6\u5904\u7406\uff0c\u9664\u4e86\u4f7f\u7528\u4e8b\u4ef6\u59d4\u6258\u6765\u51cf\u5c11\u4e8b\u4ef6\u76d1\u542c\u5668\u6570\u91cf\uff0c\u5408\u7406\u4f7f\u7528\u8282\u6d41\uff08throttle\uff09\u548c\u9632\u6296\uff08debounce\uff09\u6280\u672f\u4e5f\u80fd\u663e\u8457\u63d0\u9ad8\u6027\u80fd\u3002\u8fd9\u4e24\u79cd\u6280\u672f\u901a\u8fc7\u63a7\u5236\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u7684\u6267\u884c\u9891\u7387\uff0c\u6765\u907f\u514d\u9ad8\u9891\u4e8b\u4ef6\uff08\u5982\u6eda\u52a8\u3001\u7a97\u53e3\u7f29\u653e\u7b49\uff09\u5bfc\u81f4\u7684\u6027\u80fd\u95ee\u9898\u3002<\/p>\n<\/p>\n

\u4e94\u3001\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\u5904\u7406<\/h2>\n<\/p>\n

\u5728\u4e0d\u540c\u7684\u6d4f\u89c8\u5668\u4e2d\uff0c\u76f8\u540c\u7684JavaScript\u4ee3\u7801\u53ef\u80fd\u4f1a\u6709\u4e0d\u540c\u7684\u6267\u884c\u7ed3\u679c\u3002\u4e3a\u4e86\u5b9e\u73b0\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u6027\uff0c\u5f00\u53d1\u8005\u9700\u8981\u8bc6\u522b\u5e76\u5904\u7406\u8fd9\u4e9b\u5dee\u5f02\u3002\u8fd9\u5305\u62ec\u4f7f\u7528\u529f\u80fd\u68c0\u6d4b\u6765\u786e\u5b9a\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301\u7279\u5b9a\u7684Web API\uff0c\u4f7f\u7528polyfills\u6765\u8865\u5145\u65e7\u7248\u6d4f\u89c8\u5668\u7f3a\u4e4f\u7684\u529f\u80fd\uff0c\u4ee5\u53ca\u5c3d\u53ef\u80fd\u4f7f\u7528\u8de8\u6d4f\u89c8\u5668\u517c\u5bb9\u7684\u4ee3\u7801\u548c\u5e93\u3002<\/p>\n<\/p>\n

JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u4e0d\u4ec5\u6d89\u53ca\u5230\u6df1\u5165\u7406\u89e3DOM\u548cJavaScript\u7684\u7ec6\u8282\uff0c\u8fd8\u5305\u62ec\u5bf9\u4ea4\u4e92\u8bbe\u8ba1\u3001\u6027\u80fd\u4f18\u5316\u7b49\u591a\u65b9\u9762\u7684\u8003\u8651\u3002\u901a\u8fc7\u7cbe\u901a\u8fd9\u4e9b\u6280\u672f\u548c\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6784\u5efa\u51fa\u65e2\u4e30\u5bcc\u53c8\u9ad8\u6548\u7684Web\u5e94\u7528\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1<\/strong>\u662f\u4ec0\u4e48\uff1f<\/p>\n

JavaScript DOM\uff08\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff09\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u662f\u4e00\u79cd\u4f7f\u7528JavaScript\u7f16\u7a0b\u8bed\u8a00\u8fdb\u884c\u7f51\u9875\u5f00\u53d1\u7684\u6280\u672f\u3002\u5b83\u6d89\u53ca\u5230\u4f7f\u7528DOM\u63a5\u53e3\u64cd\u4f5c\u7f51\u9875\u7684\u5143\u7d20\u3001\u5c5e\u6027\u548c\u4e8b\u4ef6\uff0c\u5b9e\u73b0\u52a8\u6001\u7684\u4ea4\u4e92\u6548\u679c\u548c\u6570\u636e\u64cd\u4f5c\u3002<\/p>\n

\u5982\u4f55\u4f7f\u7528JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u6765\u64cd\u4f5c\u7f51\u9875\u5143\u7d20\uff1f<\/strong><\/p>\n

\u4f7f\u7528JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\uff0c\u60a8\u53ef\u4ee5\u4f7f\u7528\u8bf8\u5982getElementById\u3001getElementsByClassName\u548cquerySelector\u7b49\u65b9\u6cd5\u6765\u83b7\u53d6\u7f51\u9875\u4e0a\u7684\u5143\u7d20\u3002\u7136\u540e\uff0c\u60a8\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u5143\u7d20\u7684\u5c5e\u6027\u3001\u6837\u5f0f\u6216\u5185\u5bb9\u6765\u64cd\u4f5c\u5b83\u4eec\u3002\u60a8\u8fd8\u53ef\u4ee5\u6dfb\u52a0\u6216\u5220\u9664\u5143\u7d20\uff0c\u4ee5\u53ca\u76d1\u542c\u5e76\u54cd\u5e94\u5143\u7d20\u7684\u4e8b\u4ef6\u3002<\/p>\n

JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u6709\u54ea\u4e9b\u5b9e\u9645\u5e94\u7528\uff1f<\/strong><\/p>\n

JavaScript DOM\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u5e7f\u6cdb\u5e94\u7528\u4e8e\u7f51\u9875\u5f00\u53d1\u4e2d\u7684\u5404\u79cd\u529f\u80fd\u3002\u5b83\u53ef\u4ee5\u7528\u4e8e\u5b9e\u73b0\u52a8\u6001\u7684\u8868\u5355\u9a8c\u8bc1\uff0c\u901a\u8fc7\u64cd\u4f5cDOM\u5143\u7d20\u6765\u6539\u53d8\u8868\u5355\u7684\u6837\u5f0f\u6216\u63d0\u793a\u9519\u8bef\u4fe1\u606f\u3002\u5b83\u8fd8\u53ef\u4ee5\u7528\u4e8e\u521b\u5efa\u4ea4\u4e92\u5f0f\u7684\u56fe\u7247\u8f6e\u64ad\u3001\u5c55\u793a\u9690\u85cf\u7684\u5185\u5bb9\uff0c\u5e76\u901a\u8fc7\u76d1\u542c\u4e8b\u4ef6\u6765\u5b9e\u73b0\u52a8\u6001\u52a0\u8f7d\u6570\u636e\u7b49\u529f\u80fd\u3002\u6b64\u5916\uff0c\u5b83\u8fd8\u53ef\u4ee5\u4e0e\u670d\u52a1\u5668\u8fdb\u884c\u901a\u4fe1\uff0c\u901a\u8fc7AJAX\u6280\u672f\u6765\u5b9e\u73b0\u5f02\u6b65\u52a0\u8f7d\u5185\u5bb9\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript DOM\uff08Document Object Model\uff09\u9ad8\u7ea7\u7a0b\u5e8f\u8bbe\u8ba1\u662f\u4f7f\u7528JavaScrip […]","protected":false},"author":3,"featured_media":171083,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/171077"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=171077"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/171077\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/171083"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=171077"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=171077"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=171077"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}