{"id":155188,"date":"2024-05-08T11:48:03","date_gmt":"2024-05-08T03:48:03","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/155188.html"},"modified":"2024-05-08T11:48:06","modified_gmt":"2024-05-08T03:48:06","slug":"%e7%a7%bb%e5%8a%a8%e7%ab%af-web-%e5%bc%80%e5%8f%91%e4%b8%ad%e5%b8%b8%e7%94%a8%e7%9a%84-javascript-%e5%8d%95%e8%a1%8c%e4%bb%a3%e7%a0%81%e6%9c%89%e5%93%aa%e4%ba%9b-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/155188.html","title":{"rendered":"\u79fb\u52a8\u7aef web \u5f00\u53d1\u4e2d\u5e38\u7528\u7684 JavaScript \u5355\u884c\u4ee3\u7801\u6709\u54ea\u4e9b"},"content":{"rendered":"

\"\u79fb\u52a8\u7aef<\/p>\n

\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u4e2d\u5e38\u7528\u7684JavaScript\u5355\u884c\u4ee3\u7801\u5305\u62ecDOM\u5143\u7d20\u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u3001\u6837\u5f0f\u4fee\u6539\u3001\u5185\u5bb9\u7ba1\u7406<\/strong>\u7b49\u3002\u5176\u4e2d\uff0c\u6837\u5f0f\u4fee\u6539<\/strong>\u901a\u5e38\u662f\u975e\u5e38\u5e38\u89c1\u548c\u5b9e\u7528\u7684\u3002\u4f8b\u5982\uff0c\u4f7f\u7528document.body.style.backgroundColor = "#f0f0f0";<\/code>\u53ef\u4ee5\u5feb\u901f\u66f4\u6539\u9875\u9762\u7684\u80cc\u666f\u8272\uff0c\u8fd9\u6837\u7684\u5355\u884c\u4ee3\u7801\u80fd\u7acb\u5373\u5bf9\u7528\u6237\u754c\u9762\u4ea7\u751f\u5f71\u54cd\uff0c\u63d0\u5347\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n

\u4e00\u3001DOM\u5143\u7d20\u64cd\u4f5c<\/h2>\n<\/p>\n

\u5728\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u4e2d\uff0c\u6211\u4eec\u5e38\u5e38\u9700\u8981\u5feb\u901f\u5bf9DOM\u5143\u7d20\u8fdb\u884c\u67e5\u627e\u3001\u6dfb\u52a0\u6216\u5220\u9664\u64cd\u4f5c\u3002\u4e00\u4e9b\u5355\u884c\u4ee3\u7801\u53ef\u4ee5\u5e2e\u52a9\u5f00\u53d1\u8005\u5b9e\u73b0\u8fd9\u4e9b\u9700\u6c42\u3002<\/p>\n<\/p>\n

\u83b7\u53d6\u5143\u7d20<\/h3>\n<\/p>\n

var myElement = document.getElementById('myElementId');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u884c\u4ee3\u7801\u901a\u8fc7\u5143\u7d20\u7684ID\u5feb\u901f\u83b7\u53d6\u5230DOM\u4e2d\u7684\u5143\u7d20\u5bf9\u8c61\u3002<\/p>\n<\/p>\n
\u521b\u5efa\u5143\u7d20<\/h3>\n<\/p>\n
var newDiv = document.createElement('div');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u5355\u884c\u4ee3\u7801\u53ef\u4ee5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684<div><\/code>\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u6dfb\u52a0\u5143\u7d20<\/h3>\n<\/p>\n
document.body.appendChild(newDiv);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6dfb\u52a0\u65b0\u5143\u7d20\u5230\u9875\u9762\u7684body\u4e2d\uff0c\u6b64\u64cd\u4f5c\u5728\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u4e2d\u5c24\u5176\u6709\u7528\uff0c\u6bd4\u5982\u5f53\u6211\u4eec\u9700\u8981\u52a8\u6001\u5730\u6dfb\u52a0\u5185\u5bb9\u6216\u7ec4\u4ef6\u65f6\u3002<\/p>\n<\/p>\n
\u5220\u9664\u5143\u7d20<\/h3>\n<\/p>\n
myElement.parentNode.removeChild(myElement);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5220\u9664\u9875\u9762\u4e0a\u7684\u6307\u5b9a\u5143\u7d20\uff0c\u4f7f\u7528\u8fd9\u4e2a\u4ee3\u7801\u53ef\u4ee5\u4eceDOM\u6811\u4e2d\u79fb\u9664\u4e0d\u518d\u9700\u8981\u7684\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u4e8c\u3001\u4e8b\u4ef6\u5904\u7406<\/h2>\n<\/p>\n
\u5728\u79fb\u52a8\u7aef\u7f51\u9875\u4e2d\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c\u662f\u5e38\u89c1\u9700\u6c42\uff0c\u5355\u884c\u4ee3\u7801\u53ef\u4ee5\u4f7f\u5f97\u8fd9\u4e00\u64cd\u4f5c\u53d8\u5f97\u7b80\u6d01\u9ad8\u6548\u3002<\/p>\n<\/p>\n
\u6dfb\u52a0\u4e8b\u4ef6\u76d1\u542c<\/h3>\n<\/p>\n
myElement.addEventListener('click', function() { alert('Clicked!'); });<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u884c\u4ee3\u7801\u4e3a\u4e00\u4e2a\u5143\u7d20\u6dfb\u52a0\u4e86\u70b9\u51fb\u4e8b\u4ef6\u76d1\u542c\uff0c\u5f53\u5143\u7d20\u88ab\u70b9\u51fb\u65f6\uff0c\u9875\u9762\u4f1a\u5f39\u51fa\u63d0\u793a\u3002<\/p>\n<\/p>\n
\u79fb\u9664\u4e8b\u4ef6\u76d1\u542c<\/h3>\n<\/p>\n
myElement.removeEventListener('click', myFunction);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u53ef\u4ee5\u901a\u8fc7\u8fd9\u884c\u4ee3\u7801\u79fb\u9664\u5148\u524d\u901a\u8fc7addEventListener\u6dfb\u52a0\u7684\u4e8b\u4ef6\u76d1\u542c\u3002<\/p>\n<\/p>\n
\u4e09\u3001\u6837\u5f0f\u4fee\u6539<\/h2>\n<\/p>\n
\u6837\u5f0f\u4fee\u6539\u662f\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u4e2d\u5e38\u7528\u6765\u6539\u53d8\u9875\u9762\u5916\u89c2\u7684\u64cd\u4f5c\u3002<\/p>\n<\/p>\n
\u4fee\u6539\u5143\u7d20\u6837\u5f0f<\/h3>\n<\/p>\n
myElement.style.color = 'blue';<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5feb\u901f\u6539\u53d8\u5143\u7d20\u7684\u5b57\u4f53\u989c\u8272\u4e3a\u84dd\u8272\u3002<\/p>\n<\/p>\n
\u5207\u6362\u7c7b<\/h3>\n<\/p>\n
myElement.classList.toggle('my-class-name');<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u884c\u4ee3\u7801\u53ef\u4ee5\u5207\u6362\u5143\u7d20\u7684\u7c7b\uff0c\u5982\u679c\u7c7b\u540d\u5b58\u5728\u5219\u79fb\u9664\uff0c\u4e0d\u5b58\u5728\u5219\u6dfb\u52a0\uff0c\u7528\u4e8e\u6539\u53d8\u5143\u7d20\u7684\u6837\u5f0f\u3002<\/p>\n<\/p>\n
\u56db\u3001\u5185\u5bb9\u7ba1\u7406<\/h2>\n<\/p>\n
\u901a\u8fc7JavaScript\u53ef\u4ee5\u5feb\u901f\u5730\u7ba1\u7406\u9875\u9762\u5185\u5bb9\uff0c\u5305\u62ec\u4fee\u6539\u6587\u672c\u6216HTML\u3002<\/p>\n<\/p>\n
\u4fee\u6539\u6587\u672c\u5185\u5bb9<\/h3>\n<\/p>\n
myElement.textContent = 'New text content!';<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8be5\u4ee3\u7801\u7528\u4e8e\u4fee\u6539\u6307\u5b9a\u5143\u7d20\u7684\u6587\u672c\u5185\u5bb9\u3002<\/p>\n<\/p>\n
\u4fee\u6539HTML\u5185\u5bb9<\/h3>\n<\/p>\n
myElement.innerHTML = '<span>New HTML content!<\/span>';<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e2a\u5355\u884c\u4ee3\u7801\u53ef\u4ee5\u6539\u53d8\u5143\u7d20\u5185\u90e8\u7684HTML\u7ed3\u6784\uff0c\u5feb\u901f\u63d2\u5165\u65b0\u7684HTML\u5143\u7d20\u3002<\/p>\n<\/p>\n
\u4e94\u3001\u52a8\u753b\u4e0e\u4ea4\u4e92<\/h2>\n<\/p>\n
\u52a8\u753b\u6548\u679c\u548c\u9875\u9762\u4ea4\u4e92\u662f\u63d0\u5347\u79fb\u52a8\u7aef\u7528\u6237\u4f53\u9a8c\u7684\u91cd\u8981\u56e0\u7d20\u3002<\/p>\n<\/p>\n
\u7b80\u5355\u52a8\u753b\u6548\u679c<\/h3>\n<\/p>\n
myElement.style.transition = 'transform 0.5s ease';<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u6dfb\u52a0\u7b80\u5355\u7684\u8fc7\u6e21\u52a8\u753b<\/strong>\uff0c\u5728\u6837\u5f0f\u53d8\u5316\u65f6\u51fa\u73b0\u5e73\u6ed1\u8fc7\u6e21\u6548\u679c\u3002<\/p>\n<\/p>\n
\u4ea4\u4e92\u53cd\u9988<\/h3>\n<\/p>\n
myElement.style.boxShadow = '0px 0px 5px #777';<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u7ed9\u5143\u7d20\u6dfb\u52a0\u9634\u5f71\uff0c\u901a\u5e38\u5728\u7528\u6237\u4ea4\u4e92\u65f6\u4f5c\u4e3a\u53cd\u9988\u51fa\u73b0\uff0c\u5982\u6309\u94ae\u70b9\u51fb\u3002<\/p>\n<\/p>\n
\u516d\u3001\u5de5\u5177\u4e0e\u8f85\u52a9<\/h2>\n<\/p>\n
\u6700\u540e\uff0c\u4e00\u4e9b\u5355\u884c\u4ee3\u7801\u53ef\u4ee5\u4f5c\u4e3a\u5f00\u53d1\u5de5\u5177\u6216\u8f85\u52a9\u529f\u80fd\u4f7f\u7528\u3002<\/p>\n<\/p>\n
\u6253\u5370\u4fe1\u606f<\/h3>\n<\/p>\n
console.log('Current value:', variable);<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u5feb\u901f\u6253\u5370\u53d8\u91cf\u7684\u503c\u5230\u63a7\u5236\u53f0\uff0c\u65b9\u4fbf\u8c03\u8bd5\u3002<\/p>\n<\/p>\n
\u5f53\u524d\u65f6\u95f4\u6233<\/h3>\n<\/p>\n
var timestamp = Date.now();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u7684\u65f6\u95f4\u6233\uff0c\u7528\u4e8e\u65f6\u95f4\u5904\u7406\u6216\u6027\u80fd\u5206\u6790\u3002<\/p>\n<\/p>\n
JavaScript\u5355\u884c\u4ee3\u7801\u4e3a\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u63d0\u4f9b\u4e86\u4fbf\u6377\u4e0e\u9ad8\u6548\uff0c\u4f46\u8981\u6ce8\u610f\u8fc7\u5ea6\u4f9d\u8d56\u53ef\u80fd\u4f1a\u964d\u4f4e\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u548c\u7ef4\u62a4\u6027\u3002\u5408\u7406\u4f7f\u7528\u5355\u884c\u4ee3\u7801\uff0c\u5c06\u7b80\u5316\u64cd\u4f5c\u4e0e\u4ee3\u7801\u53ef\u7ef4\u62a4\u6027\u4e4b\u95f4\u7ecf\u884c\u5e73\u8861\uff0c\u53ef\u4ee5\u663e\u8457\u63d0\u9ad8\u5f00\u53d1\u6548\u7387\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. \u5982\u4f55\u5728\u79fb\u52a8\u7aef web \u5f00\u53d1\u4e2d\u5b9e\u73b0\u70b9\u51fb\u4e8b\u4ef6\uff1f<\/strong><\/p>\n
\u5e38\u7528\u7684 JavaScript \u5355\u884c\u4ee3\u7801\u662f\u901a\u8fc7addEventListener\u65b9\u6cd5\u7ed9\u5143\u7d20\u7ed1\u5b9a\u70b9\u51fb\u4e8b\u4ef6\uff0c\u4f8b\u5982\uff1a<\/p>\n
document.getElementById("btn").addEventListener("click", function() {\n  \/\/ \u5904\u7406\u70b9\u51fb\u4e8b\u4ef6\u7684\u4ee3\u7801\n});\n<\/code><\/pre>\n
2. \u5982\u4f55\u5728\u79fb\u52a8\u7aef web \u5f00\u53d1\u4e2d\u83b7\u53d6\u8bbe\u5907\u5c4f\u5e55\u5bbd\u5ea6\u548c\u9ad8\u5ea6\uff1f<\/strong><\/p>\n
\u5e38\u7528\u7684 JavaScript \u5355\u884c\u4ee3\u7801\u662f\u901a\u8fc7window\u5bf9\u8c61\u7684innerWidth\u548cinnerHeight\u5c5e\u6027\u6765\u83b7\u53d6\u8bbe\u5907\u5c4f\u5e55\u5bbd\u5ea6\u548c\u9ad8\u5ea6\uff0c\u4f8b\u5982\uff1a<\/p>\n
var screenWidth = window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth;\nvar screenHeight = window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight;\n<\/code><\/pre>\n
3. \u5982\u4f55\u5728\u79fb\u52a8\u7aef web \u5f00\u53d1\u4e2d\u5b9e\u73b0\u9875\u9762\u6eda\u52a8\u5230\u6307\u5b9a\u4f4d\u7f6e\uff1f<\/strong><\/p>\n
\u5e38\u7528\u7684 JavaScript \u5355\u884c\u4ee3\u7801\u662f\u4f7f\u7528window\u5bf9\u8c61\u7684scrollTo\u65b9\u6cd5\u6765\u5b9e\u73b0\u9875\u9762\u6eda\u52a8\uff0c\u4f8b\u5982\uff1a<\/p>\n
window.scrollTo({top: 0, behavior: 'smooth'});\n<\/code><\/pre>\n
\u8fd9\u884c\u4ee3\u7801\u5c06\u4f1a\u5c06\u9875\u9762\u6eda\u52a8\u5230\u9876\u90e8\uff0c\u5e76\u4e14\u4ee5\u5e73\u6ed1\u7684\u52a8\u753b\u6548\u679c\u8fdb\u884c\u8fc7\u6e21\u3002\u4f60\u4e5f\u53ef\u4ee5\u6839\u636e\u9700\u8981\u4fee\u6539top\u7684\u503c\u6765\u6eda\u52a8\u5230\u9875\u9762\u4e2d\u7684\u5176\u4ed6\u4f4d\u7f6e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"\u79fb\u52a8\u7aefWeb\u5f00\u53d1\u4e2d\u5e38\u7528\u7684JavaScript\u5355\u884c\u4ee3\u7801\u5305\u62ecDOM\u5143\u7d20\u64cd\u4f5c\u3001\u4e8b\u4ef6\u5904\u7406\u3001\u6837\u5f0f\u4fee\u6539\u3001\u5185\u5bb9\u7ba1\u7406\u7b49\u3002\u5176\u4e2d\uff0c […]","protected":false},"author":3,"featured_media":155195,"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\/155188"}],"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=155188"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/155188\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/155195"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=155188"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=155188"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=155188"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}