{"id":167859,"date":"2024-05-08T16:11:37","date_gmt":"2024-05-08T08:11:37","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/167859.html"},"modified":"2024-05-08T16:11:45","modified_gmt":"2024-05-08T08:11:45","slug":"javascript-%e4%b8%ad%e6%80%8e%e4%b9%88%e5%88%a9%e7%94%a8-dom-%e5%ae%9e%e7%8e%b0%e6%95%b0%e6%8d%ae%e8%ae%bf%e9%97%ae","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/167859.html","title":{"rendered":"JavaScript \u4e2d\u600e\u4e48\u5229\u7528 DOM \u5b9e\u73b0\u6570\u636e\u8bbf\u95ee"},"content":{"rendered":"<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/cdn-kb.worktile.com\/kb\/wp-content\/uploads\/2024\/04\/27033900\/778e4165-ac2e-4eeb-b564-6aeb01e63205.webp\" alt=\"JavaScript \u4e2d\u600e\u4e48\u5229\u7528 DOM \u5b9e\u73b0\u6570\u636e\u8bbf\u95ee\" \/><\/p>\n<p><p>\u5728JavaScript\u4e2d\uff0c<strong>\u5229\u7528DOM(Data Object Model)\u5b9e\u73b0\u6570\u636e\u8bbf\u95ee<\/strong> 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\u53ef\u4ee5\u83b7\u53d6\u5177\u6709\u7279\u5b9aID\u7684\u5143\u7d20\u8282\u70b9\uff0c\u800c <code>document.getElementsByClassName()<\/code> \u53ef\u4ee5\u8fd4\u56de\u5305\u542b\u6307\u5b9a\u7c7b\u540d\u7684\u8282\u70b9\u5217\u8868\u3002\u83b7\u53d6\u8fd9\u4e9b\u8282\u70b9\u4e4b\u540e\uff0c\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u5b83\u4eec\u7684 <code>innerHTML<\/code> \u6216 <code>textContent<\/code> \u5c5e\u6027\u6765\u8bfb\u53d6\u6216\u4fee\u6539\u8282\u70b9\u7684\u5185\u5bb9\u3002<\/p>\n<\/p>\n<p><h4>\u521b\u5efa\u548c\u5220\u9664\u5143\u7d20<\/h4>\n<\/p>\n<p><p>JavaScript\u4e5f\u53ef\u4ee5\u52a8\u6001\u5730\u521b\u5efa\u65b0\u7684HTML\u5143\u7d20\u8282\u70b9\uff0c\u6bd4\u5982\u901a\u8fc7 <code>document.createElement()<\/code> \u521b\u5efa\u65b0\u5143\u7d20\uff0c\u7136\u540e\u4f7f\u7528 <code>appendChild()<\/code> \u6216 <code>insertBefore()<\/code> \u65b9\u6cd5\u5c06\u5176\u63d2\u5165\u5230DOM\u6811\u4e2d\u7684\u5408\u9002\u4f4d\u7f6e\u3002\u76f8\u53cd\u5730\uff0c<code>removeChild()<\/code> \u6216 <code>replaceChild()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u7528\u6765\u5220\u9664\u6216\u66ff\u6362\u8282\u70b9\u3002\u8fd9\u4e9b\u64cd\u4f5c\u5141\u8bb8\u52a8\u6001\u5730\u6539\u53d8\u9875\u9762\u7ed3\u6784\uff0c\u5b9e\u73b0\u6570\u636e\u7684\u5b9e\u65f6\u8bbf\u95ee\u548c\u66f4\u65b0\u3002<\/p>\n<\/p>\n<p><h3>\u4e8c\u3001\u4e8b\u4ef6\u5904\u7406<\/h3>\n<\/p>\n<p><p>\u4e8b\u4ef6\u662f\u9875\u9762\u4e2d\u53d1\u751f\u4e8b\u60c5\u7684\u65b9\u5f0f\uff0c\u4f8b\u5982\u7528\u6237\u7684\u70b9\u51fb\u3001\u9f20\u6807\u60ac\u505c\u6216\u662f\u952e\u76d8\u64cd\u4f5c\u3002DOM\u4e8b\u4ef6\u6a21\u578b\u5141\u8bb8\u5f00\u53d1\u8005\u4e3a\u8fd9\u4e9b\u4e8b\u4ef6\u7ed1\u5b9a\u5904\u7406\u51fd\u6570\uff0c\u5b9e\u73b0\u5bf9\u7528\u6237\u884c\u4e3a\u7684\u54cd\u5e94\u548c\u6570\u636e\u7684\u52a8\u6001\u8bbf\u95ee\u3002<\/p>\n<\/p>\n<p><h4>\u4e8b\u4ef6\u76d1\u542c<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7\u4f7f\u7528 <code>addEventListener()<\/code> \u65b9\u6cd5\uff0c\u53ef\u4ee5\u4e3a\u5143\u7d20\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u5f53\u7528\u6237\u4e0e\u5143\u7d20\u4ea4\u4e92\u65f6\uff0c\u4f1a\u89e6\u53d1\u6307\u5b9a\u7684JavaScript\u51fd\u6570\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u76d1\u542c\u4e00\u4e2a\u8868\u5355\u7684 <code>submit<\/code> \u4e8b\u4ef6\u6765\u5728\u7528\u6237\u63d0\u4ea4\u8868\u5355\u65f6\uff0c\u8bfb\u53d6\u5e76\u9a8c\u8bc1\u7528\u6237\u8f93\u5165\u7684\u6570\u636e\u3002<\/p>\n<\/p>\n<p><h4>\u4e8b\u4ef6\u59d4\u6258<\/h4>\n<\/p>\n<p><p>\u5bf9\u4e8e\u9891\u7e41\u53d8\u5316\u7684DOM\u6216\u8005\u5927\u91cf\u76f8\u4f3c\u5143\u7d20\u7684\u4e8b\u4ef6\u5904\u7406\uff0c\u4e8b\u4ef6\u59d4\u6258\u662f\u4e00\u4e2a\u6709\u6548\u7684\u6280\u672f\u3002\u5b83\u5229\u7528\u4e86\u4e8b\u4ef6\u5192\u6ce1\u7684\u7279\u6027\uff0c\u53ea\u5728\u7236\u5143\u7d20\u4e0a\u8bbe\u7f6e\u4e00\u4e2a\u4e8b\u4ef6\u76d1\u542c\u5668\uff0c\u7136\u540e\u6839\u636e\u4e8b\u4ef6\u7684 <code>target<\/code> \u5c5e\u6027\u786e\u5b9a\u53d1\u751f\u4e8b\u4ef6\u7684\u786e\u5207\u5143\u7d20\u3002\u8fd9\u6837\u51cf\u5c11\u4e86\u4e8b\u4ef6\u76d1\u542c\u5668\u7684\u6570\u91cf\uff0c\u8282\u7701\u5185\u5b58\uff0c\u63d0\u5347\u6027\u80fd\u3002<\/p>\n<\/p>\n<p><h3>\u4e09\u3001\u6570\u636e\u7684\u8bfb\u53d6\u4e0e\u66f4\u65b0<\/h3>\n<\/p>\n<p><p>DOM\u4e0d\u4ec5\u8868\u793a\u9875\u9762\u7ed3\u6784\uff0c\u8fd8\u662f\u9875\u9762\u4e0a\u6570\u636e\u7684\u751f\u6d3b\u8f7d\u4f53\u3002\u4fee\u6539DOM\u5143\u7d20\u7684\u8fc7\u7a0b\uff0c\u5f80\u5f80\u4f34\u968f\u7740\u5bf9\u9875\u9762\u6570\u636e\u7684\u8bfb\u53d6\u548c\u66f4\u65b0\u3002<\/p>\n<\/p>\n<p><h4>\u6570\u636e\u8bfb\u53d6<\/h4>\n<\/p>\n<p><p>\u901a\u8fc7DOM\u53ef\u4ee5\u8bbf\u95ee\u5143\u7d20\u7684\u5185\u5bb9\u3001\u5c5e\u6027\u3001CSS\u6837\u5f0f\u7b49\u3002\u4f8b\u5982 <code>element.getAttribute(&#039;data&#039;)<\/code> \u53ef\u4ee5\u83b7\u53d6\u5143\u7d20\u7684\u6570\u636e\u5c5e\u6027\u503c\uff0c\u8fd9\u662f\u4eceDOM\u4e2d\u8bfb\u53d6\u6570\u636e\u7684\u4e00\u79cd\u65b9\u5f0f\u3002\u800c\u901a\u8fc7\u5143\u7d20\u7684 <code>value<\/code> \u5c5e\u6027\u53ef\u4ee5\u76f4\u63a5\u8bfb\u53d6\u8868\u5355\u63a7\u4ef6\u5982\u6587\u672c\u6846\u6216\u662f\u9009\u62e9\u6846\u7684\u503c\u3002<\/p>\n<\/p>\n<p><h4>\u6570\u636e\u66f4\u65b0<\/h4>\n<\/p>\n<p><p>\u66f4\u65b0DOM\u901a\u5e38\u662f\u4e3a\u4e86\u54cd\u5e94\u7528\u6237\u7684\u64cd\u4f5c\u6216\u662f\u5e94\u7528\u72b6\u6001\u7684\u6539\u53d8\uff0c\u8fd9\u6d89\u53ca\u5230\u76f4\u63a5\u4fee\u6539\u5143\u7d20\u7684\u5185\u5bb9\u6216\u5c5e\u6027\u3002\u4f7f\u7528 <code>element.setAttribute(&#039;data&#039;, newValue)<\/code> \u53ef\u4ee5\u66f4\u6539\u4e00\u4e2a\u5143\u7d20\u7684\u6570\u636e\u5c5e\u6027\uff0c\u800c <code>element.style.color = &#039;red&#039;<\/code> \u5219\u76f4\u63a5\u66f4\u6539\u4e86\u5143\u7d20\u7684\u6837\u5f0f\u3002<\/p>\n<\/p>\n<p><h3>\u56db\u3001\u5f02\u6b65\u6570\u636e\u4e0eDOM\u64cd\u4f5c<\/h3>\n<\/p>\n<p><p>\u5728\u73b0\u4ee3\u7f51\u9875\u5e94\u7528\u4e2d\uff0c\u6570\u636e\u901a\u5e38\u4ee5\u5f02\u6b65\u7684\u65b9\u5f0f\u4ece\u670d\u52a1\u5668\u52a0\u8f7d\u3002\u5229\u7528AJAX\uff08Asynchronous JavaScript and XML\uff09\u6216Fetch API\u53ef\u4ee5\u5728\u4e0d\u91cd\u8f7d\u6574\u4e2a\u9875\u9762\u7684\u60c5\u51b5\u4e0b\uff0c\u4ece\u670d\u52a1\u5668\u8bf7\u6c42\u6570\u636e\u3002\u7136\u540e\uff0c\u53ef\u4ee5\u4f7f\u7528DOM\u64cd\u4f5c\u5c06\u8fd4\u56de\u7684\u6570\u636e\u52a8\u6001\u5730\u663e\u793a\u5728\u9875\u9762\u4e0a\u3002<\/p>\n<\/p>\n<p><h4>\u4f7f\u7528AJAX<\/h4>\n<\/p>\n<p><p>AJAX\u6280\u672f\u53ef\u4ee5\u5728\u9875\u9762\u52a0\u8f7d\u540e\u4ece\u670d\u52a1\u5668\u8bf7\u6c42\u6570\u636e\u3002\u4f7f\u7528 <code>XMLHttpRequest<\/code> \u5bf9\u8c61\u6216\u66f4\u73b0\u4ee3\u7684 <code>fetch()<\/code> 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<code>DocumentFragment<\/code> \u662f\u5b8c\u6210\u6b64\u7c7b\u64cd\u4f5c\u7684\u4e00\u79cd\u6709\u6548\u65b9\u5f0f\u3002<\/p>\n<\/p>\n<p><h4>DOM\u56de\u6d41\u548c\u91cd\u7ed8<\/h4>\n<\/p>\n<p><p>\u7406\u89e3DOM\u7684\u56de\u6d41(reflow)\u548c\u91cd\u7ed8(rep<a href=\"https:\/\/docs.pingcode.com\/blog\/59162.html\" 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