{"id":170657,"date":"2024-05-08T17:12:24","date_gmt":"2024-05-08T09:12:24","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/170657.html"},"modified":"2024-05-08T17:12:34","modified_gmt":"2024-05-08T09:12:34","slug":"javascript-%e7%bc%96%e7%a8%8b%e6%80%8e%e4%b9%88%e6%93%8d%e4%bd%9c%e5%85%83%e7%b4%a0%e5%86%85%e5%ae%b9","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/170657.html","title":{"rendered":"JavaScript \u7f16\u7a0b\u600e\u4e48\u64cd\u4f5c\u5143\u7d20\u5185\u5bb9"},"content":{"rendered":"

\"JavaScript<\/p>\n

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innerHTML<\/strong> \u662f\u7528\u4e8e\u83b7\u53d6\u6216\u8bbe\u7f6e\u5143\u7d20\u5185HTML\u5185\u5bb9\u7684\u5c5e\u6027\u3002\u8fd9\u79cd\u65b9\u5f0f\u7b80\u6d01\u9ad8\u6548\uff0c\u5c24\u5176\u9002\u7528\u4e8e\u9700\u8981\u5305\u542bHTML\u6807\u7b7e\u7684\u5185\u5bb9\u3002\u5f53\u8bbe\u7f6einnerHTML\u65f6\uff0c\u6d4f\u89c8\u5668\u4f1a\u89e3\u6790HTML\u6807\u7b7e\uff0c\u5e76\u6784\u5efa\u76f8\u5e94\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n

\u4e00\u3001\u83b7\u53d6\u548c\u8bbe\u7f6e\u5143\u7d20\u5185\u5bb9<\/h3>\n<\/p>\n

\u83b7\u53d6\u5143\u7d20\u5185\u5bb9<\/h4>\n<\/p>\n

\u8981\u83b7\u53d6HTML\u5143\u7d20\u7684\u5185\u5bb9\uff0c\u53ef\u4ee5\u4f7f\u7528innerHTML<\/code>\u548ctextContent<\/code>\u5c5e\u6027\u3002innerHTML<\/code>\u8fd4\u56de\u5143\u7d20\u5185\u7684HTML\u5185\u5bb9\uff0c\u5305\u62ec\u6240\u6709\u7684HTML\u6807\u7b7e\u3002\u800ctextContent<\/code>\u5219\u4ec5\u8fd4\u56de\u6587\u672c\u5185\u5bb9\uff0c\u4e0d\u5305\u62ec\u4efb\u4f55HTML\u6807\u7b7e\u3002<\/p>\n<\/p>\n

var element = document.getElementById("myElement");<\/p>\n
var htmlContent = element.innerHTML; \/\/ \u83b7\u53d6HTML\u5185\u5bb9<\/p>\n
var textContent = element.textContent; \/\/ \u83b7\u53d6\u7eaf\u6587\u672c\u5185\u5bb9<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8bbe\u7f6e\u5143\u7d20\u5185\u5bb9<\/h4>\n<\/p>\n
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var element = document.getElementById("myElement");<\/p>\n
element.innerHTML = "<p>\u65b0\u7684HTML\u5185\u5bb9<\/p>"; \/\/ \u8bbe\u7f6eHTML\u5185\u5bb9<\/p>\n
element.textContent = "\u65b0\u7684\u7eaf\u6587\u672c\u5185\u5bb9"; \/\/ \u8bbe\u7f6e\u7eaf\u6587\u672c\u5185\u5bb9<\/p>\n
<\/code><\/pre>\n<\/p>\n
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\u521b\u5efa\u65b0\u5143\u7d20<\/h4>\n<\/p>\n
JavaScript\u63d0\u4f9b\u4e86document.createElement()<\/code>\u65b9\u6cd5\u6765\u521b\u5efa\u65b0\u7684HTML\u5143\u7d20\u3002\u8fd9\u5141\u8bb8\u5f00\u53d1\u8005\u52a8\u6001\u5730\u5411\u7f51\u9875\u4e2d\u6dfb\u52a0\u65b0\u5185\u5bb9\u3002<\/p>\n<\/p>\n
var newElement = document.createElement("p"); \/\/ \u521b\u5efa\u4e00\u4e2a\u65b0\u7684<p>\u5143\u7d20<\/p>\n
newElement.textContent = "\u8fd9\u662f\u4e00\u6bb5\u65b0\u6587\u672c"; \/\/ \u4e3a\u65b0\u5143\u7d20\u6dfb\u52a0\u6587\u672c\u5185\u5bb9<\/p>\n
<\/code><\/pre>\n<\/p>\n
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var parentElement = document.getElementById("parent");<\/p>\n
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var referenceElement = document.getElementById("reference");<\/p>\n
parentElement.insertBefore(newElement, referenceElement); \/\/ \u5c06\u65b0\u5143\u7d20\u6dfb\u52a0\u5230\u53c2\u8003\u5143\u7d20\u4e4b\u524d<\/p>\n
<\/code><\/pre>\n<\/p>\n
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var elementClass = element.getAttribute("class"); \/\/ \u83b7\u53d6class\u5c5e\u6027\u7684\u503c<\/p>\n
element.setAttribute("class", "newClass"); \/\/ \u8bbe\u7f6e\u65b0\u7684class\u5c5e\u6027\u503c<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u79fb\u9664\u5c5e\u6027<\/h4>\n<\/p>\n
\u4f7f\u7528removeAttribute()<\/code>\u65b9\u6cd5\uff0c\u5f00\u53d1\u8005\u80fd\u591f\u4ece\u5143\u7d20\u4e2d\u79fb\u9664\u6307\u5b9a\u7684\u5c5e\u6027\u3002<\/p>\n<\/p>\n
element.removeAttribute("class"); \/\/ \u79fb\u9664class\u5c5e\u6027<\/p>\n
<\/code><\/pre>\n<\/p>\n
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\u4fee\u6539CSS\u6837\u5f0f<\/h4>\n<\/p>\n
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var element = document.getElementById("myElement");<\/p>\n
element.style.color = "red"; \/\/ \u5c06\u5143\u7d20\u7684\u6587\u672c\u989c\u8272\u8bbe\u7f6e\u4e3a\u7ea2\u8272<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6dfb\u52a0\u548c\u79fb\u9664\u7c7b<\/h4>\n<\/p>\n
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var element = document.getElementById("myElement");<\/p>\n
element.classList.add("newClass"); \/\/ \u6dfb\u52a0\u4e00\u4e2a\u65b0\u7c7b<\/p>\n
element.classList.remove("oldClass"); \/\/ \u79fb\u9664\u4e00\u4e2a\u65e7\u7c7b<\/p>\n
element.classList.toggle("activeClass"); \/\/ \u5207\u6362\u4e00\u4e2a\u7c7b\u7684\u5b58\u5728\u72b6\u6001<\/p>\n
<\/code><\/pre>\n<\/p>\n
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\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u4f7f\u7528JavaScript\u6765\u66f4\u6539\u5143\u7d20\u7684\u5185\u5bb9\uff1f<\/strong>
\n\u4f7f\u7528JavaScript\u7f16\u7a0b\u53ef\u4ee5\u901a\u8fc7\u9009\u62e9\u5143\u7d20\u5e76\u4f7f\u7528DOM\uff08\u6587\u6863\u5bf9\u8c61\u6a21\u578b\uff09\u65b9\u6cd5\u6765\u66f4\u6539\u5143\u7d20\u7684\u5185\u5bb9\u3002\u4f8b\u5982\uff0c\u53ef\u4ee5\u901a\u8fc7getElementById()\u65b9\u6cd5\u83b7\u53d6\u7279\u5b9aid\u7684\u5143\u7d20\uff0c\u5e76\u4f7f\u7528innerHTML\u5c5e\u6027\u6765\u66f4\u65b0\u5176\u5185\u5bb9\u3002\u53ef\u4ee5\u7b80\u5355\u5730\u5c06\u65b0\u7684HTML\u6216\u7eaf\u6587\u672c\u8d4b\u7ed9innerHTML\u5c5e\u6027\uff0c\u4ee5\u66ff\u6362\u5143\u7d20\u539f\u6765\u7684\u5185\u5bb9\u3002<\/p>\n
2. \u5728JavaScript\u4e2d\u5982\u4f55\u5411\u5143\u7d20\u6dfb\u52a0\u5185\u5bb9\uff1f<\/strong>
\n\u8981\u5411\u5143\u7d20\u6dfb\u52a0\u5185\u5bb9\uff0c\u53ef\u4ee5\u4f7f\u7528JavaScript\u7f16\u7a0b\u7684append()\u65b9\u6cd5\u3002\u8be5\u65b9\u6cd5\u53ef\u4ee5\u5728\u5176\u4f59\u5185\u5bb9\u4e4b\u540e\u6dfb\u52a0\u65b0\u7684HTML\u6216\u7eaf\u6587\u672c\u3002\u9996\u5148\uff0c\u53ef\u4ee5\u901a\u8fc7\u9009\u62e9\u8981\u6dfb\u52a0\u5185\u5bb9\u7684\u5143\u7d20\uff0c\u5e76\u4f7f\u7528getElementById()\u7b49\u65b9\u6cd5\u83b7\u53d6\u5176\u5f15\u7528\u3002\u7136\u540e\uff0c\u4f7f\u7528append()\u65b9\u6cd5\u5c06\u65b0\u7684HTML\u6216\u6587\u672c\u6dfb\u52a0\u5230\u5143\u7d20\u7684\u5185\u90e8\u3002<\/p>\n
3. \u5982\u4f55\u4ece\u5143\u7d20\u4e2d\u5220\u9664\u5185\u5bb9\uff1f<\/strong>
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