{"id":2106,"date":"2025-02-27T23:45:20","date_gmt":"2025-02-27T15:45:20","guid":{"rendered":"https:\/\/www.laixuexila.com\/?p=2106"},"modified":"2025-02-27T23:45:20","modified_gmt":"2025-02-27T15:45:20","slug":"javascript-html-dom-%e6%94%b9%e5%8f%98-css","status":"publish","type":"post","link":"https:\/\/www.laixuexila.com\/index.php\/2025\/02\/27\/javascript-html-dom-%e6%94%b9%e5%8f%98-css\/","title":{"rendered":"JavaScript HTML DOM – \u6539\u53d8 CSS"},"content":{"rendered":"\n

\u901a\u8fc7 JavaScript \u64cd\u4f5c HTML DOM\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u6539\u53d8\u7f51\u9875\u7684\u5185\u5bb9\uff0c\u8fd8\u53ef\u4ee5\u52a8\u6001\u5730\u4fee\u6539\u7f51\u9875\u7684\u6837\u5f0f\uff08CSS\uff09\u3002\u8fd9\u79cd\u65b9\u5f0f\u53ef\u4ee5\u8ba9\u4f60\u5728\u7f51\u9875\u52a0\u8f7d\u540e\u6839\u636e\u7528\u6237\u7684\u884c\u4e3a\u6216\u8005\u5176\u4ed6\u6761\u4ef6\u6539\u53d8\u7f51\u9875\u7684\u5916\u89c2\u3002<\/p>\n\n\n\n

1. \u4fee\u6539\u5355\u4e2a\u5143\u7d20\u7684\u6837\u5f0f<\/strong><\/h3>\n\n\n\n

\u6211\u4eec\u53ef\u4ee5\u901a\u8fc7 JavaScript \u6765\u4fee\u6539\u5143\u7d20\u7684\u884c\u5185\u6837\u5f0f\uff0c\u4f7f\u7528 style<\/code> \u5c5e\u6027\u6765\u8bbf\u95ee\u548c\u66f4\u6539\u5143\u7d20\u7684 CSS \u6837\u5f0f\u3002<\/p>\n\n\n\n

\u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Change CSS with JavaScript<\/title>\n<\/head>\n<body>\n  <h1 id=\"heading\">Change My Style!<\/h1>\n\n  <script>\n    \/\/ \u83b7\u53d6\u5143\u7d20\n    const heading = document.getElementById('heading');\n\n    \/\/ \u4fee\u6539 CSS \u6837\u5f0f\n    heading.style.color = 'red';  \/\/ \u6539\u53d8\u5b57\u4f53\u989c\u8272\n    heading.style.fontSize = '50px';  \/\/ \u6539\u53d8\u5b57\u4f53\u5927\u5c0f\n    heading.style.backgroundColor = 'yellow';  \/\/ \u6539\u53d8\u80cc\u666f\u989c\u8272\n  <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
2. \u4f7f\u7528 setProperty()<\/code> \u65b9\u6cd5\u4fee\u6539 CSS \u6837\u5f0f<\/strong><\/h3>\n\n\n\n
setProperty()<\/code> \u65b9\u6cd5\u53ef\u4ee5\u8ba9\u6211\u4eec\u8bbe\u7f6e CSS \u5c5e\u6027\uff0c\u5b83\u652f\u6301\u901a\u8fc7 JavaScript \u52a8\u6001\u5730\u4fee\u6539\u5143\u7d20\u7684\u6837\u5f0f\u3002\u5b83\u901a\u5e38\u7528\u4e8e\u4fee\u6539\u5177\u6709\u66f4\u590d\u6742\u6216\u52a8\u6001\u8bbe\u7f6e\u7684 CSS \u6837\u5f0f\u3002<\/p>\n\n\n\n
\u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>setProperty Method<\/title>\n<\/head>\n<body>\n  <div id=\"box\" style=\"width: 100px; height: 100px; background-color: blue;\"><\/div>\n\n  <script>\n    \/\/ \u83b7\u53d6\u5143\u7d20\n    const box = document.getElementById('box');\n\n    \/\/ \u4f7f\u7528 setProperty \u4fee\u6539 CSS \u6837\u5f0f\n    box.style.setProperty('background-color', 'green');  \/\/ \u4fee\u6539\u80cc\u666f\u989c\u8272\n    box.style.setProperty('width', '200px');  \/\/ \u4fee\u6539\u5bbd\u5ea6\n    box.style.setProperty('height', '200px');  \/\/ \u4fee\u6539\u9ad8\u5ea6\n  <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
3. \u6dfb\u52a0\u548c\u5220\u9664\u7c7b\uff08class\uff09<\/strong><\/h3>\n\n\n\n
\u9664\u4e86\u4fee\u6539\u884c\u5185\u6837\u5f0f\u5916\uff0c\u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539\u5143\u7d20\u7684 class<\/code> \u5c5e\u6027\u6765\u5e94\u7528\u5916\u90e8 CSS \u6837\u5f0f\u3002\u901a\u8fc7 classList<\/code> API\uff0c\u53ef\u4ee5\u6dfb\u52a0\u3001\u5220\u9664\u6216\u5207\u6362\u7c7b\u3002<\/p>\n\n\n\n
    \n
  • add()<\/strong>\uff1a\u5411\u5143\u7d20\u6dfb\u52a0\u4e00\u4e2a\u6216\u591a\u4e2a\u7c7b\u3002<\/li>\n\n\n\n
  • remove()<\/strong>\uff1a\u4ece\u5143\u7d20\u79fb\u9664\u4e00\u4e2a\u6216\u591a\u4e2a\u7c7b\u3002<\/li>\n\n\n\n
  • toggle()<\/strong>\uff1a\u5982\u679c\u7c7b\u5b58\u5728\uff0c\u5219\u5220\u9664\u5b83\uff1b\u5982\u679c\u7c7b\u4e0d\u5b58\u5728\uff0c\u5219\u6dfb\u52a0\u5b83\u3002<\/li>\n\n\n\n
  • contains()<\/strong>\uff1a\u68c0\u67e5\u5143\u7d20\u662f\u5426\u5305\u542b\u67d0\u4e2a\u7c7b\u3002<\/li>\n<\/ul>\n\n\n\n
    \u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
    <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Class Manipulation<\/title>\n  <style>\n    .highlight {\n      color: red;\n      font-size: 30px;\n    }\n    .big {\n      font-size: 50px;\n    }\n  <\/style>\n<\/head>\n<body>\n  <h1 id=\"heading\">Hello, JavaScript!<\/h1>\n\n  <script>\n    \/\/ \u83b7\u53d6\u5143\u7d20\n    const heading = document.getElementById('heading');\n\n    \/\/ \u6dfb\u52a0\u7c7b\n    heading.classList.add('highlight');  \/\/ \u7ed9\u6807\u9898\u6dfb\u52a0 'highlight' \u7c7b\n\n    \/\/ \u5207\u6362\u7c7b\n    heading.classList.toggle('big');  \/\/ \u5207\u6362 'big' \u7c7b\n\n    \/\/ \u79fb\u9664\u7c7b\n    heading.classList.remove('highlight');  \/\/ \u79fb\u9664 'highlight' \u7c7b\n  <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
    4. \u4fee\u6539\u591a\u4e2a\u5143\u7d20\u7684\u6837\u5f0f<\/strong><\/h3>\n\n\n\n
    \u5982\u679c\u6211\u4eec\u8981\u540c\u65f6\u4fee\u6539\u591a\u4e2a\u5143\u7d20\u7684\u6837\u5f0f\uff0c\u53ef\u4ee5\u901a\u8fc7 querySelectorAll()<\/code> \u6765\u9009\u62e9\u591a\u4e2a\u5143\u7d20\uff0c\u5e76\u4f7f\u7528 forEach<\/code> \u65b9\u6cd5\u904d\u5386\u8fd9\u4e9b\u5143\u7d20\u3002<\/p>\n\n\n\n
    \u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
    <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Change Multiple Elements<\/title>\n  <style>\n    .box {\n      width: 100px;\n      height: 100px;\n      margin: 10px;\n      background-color: lightblue;\n    }\n  <\/style>\n<\/head>\n<body>\n  <div class=\"box\"><\/div>\n  <div class=\"box\"><\/div>\n  <div class=\"box\"><\/div>\n\n  <script>\n    \/\/ \u83b7\u53d6\u6240\u6709\u5177\u6709 'box' \u7c7b\u7684\u5143\u7d20\n    const boxes = document.querySelectorAll('.box');\n\n    \/\/ \u904d\u5386\u6bcf\u4e2a\u5143\u7d20\u5e76\u4fee\u6539\u6837\u5f0f\n    boxes.forEach(function(box) {\n      box.style.backgroundColor = 'green';  \/\/ \u6539\u53d8\u80cc\u666f\u989c\u8272\n      box.style.width = '150px';  \/\/ \u6539\u53d8\u5bbd\u5ea6\n      box.style.height = '150px';  \/\/ \u6539\u53d8\u9ad8\u5ea6\n    });\n  <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
    5. \u52a8\u6001\u5730\u63d2\u5165\u6837\u5f0f\u8868\uff08CSS\uff09<\/strong><\/h3>\n\n\n\n
    \u6211\u4eec\u8fd8\u53ef\u4ee5\u901a\u8fc7 JavaScript \u52a8\u6001\u5730\u521b\u5efa\u5e76\u63d2\u5165\u6837\u5f0f\u8868\uff08CSS\uff09\uff0c\u4f7f\u5f97\u7f51\u9875\u6837\u5f0f\u66f4\u52a0\u52a8\u6001\u548c\u7075\u6d3b\u3002<\/p>\n\n\n\n
    \u793a\u4f8b\uff1a<\/strong><\/h4>\n\n\n\n
    <!DOCTYPE html>\n<html lang=\"en\">\n<head>\n  <meta charset=\"UTF-8\">\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n  <title>Insert CSS Dynamically<\/title>\n<\/head>\n<body>\n  <h1 id=\"heading\">Dynamically Added Styles<\/h1>\n\n  <script>\n    \/\/ \u521b\u5efa\u4e00\u4e2a <style> \u5143\u7d20\n    const style = document.createElement('style');\n    style.innerHTML = `\n      #heading {\n        color: blue;\n        font-size: 50px;\n      }\n    `;\n\n    \/\/ \u5c06 <style> \u5143\u7d20\u6dfb\u52a0\u5230 <head> \u4e2d\n    document.head.appendChild(style);\n  <\/script>\n<\/body>\n<\/html><\/code><\/pre>\n\n\n\n
    \u603b\u7ed3<\/strong><\/h3>\n\n\n\n
      \n
    • \u884c\u5185\u6837\u5f0f<\/strong>\uff1a\u901a\u8fc7 JavaScript \u7684 style<\/code> \u5c5e\u6027\u4fee\u6539\u5355\u4e2a\u5143\u7d20\u7684 CSS \u6837\u5f0f\u3002<\/li>\n\n\n\n
    • \u4fee\u6539\u7c7b<\/strong>\uff1a\u4f7f\u7528 classList<\/code> API\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u6dfb\u52a0\u3001\u79fb\u9664\u6216\u5207\u6362 CSS \u7c7b\uff0c\u4ece\u800c\u6539\u53d8\u5143\u7d20\u7684\u5916\u89c2\u3002<\/li>\n\n\n\n
    • \u6279\u91cf\u4fee\u6539<\/strong>\uff1a\u901a\u8fc7 querySelectorAll()<\/code> \u548c forEach()<\/code>\uff0c\u53ef\u4ee5\u4fee\u6539\u591a\u4e2a\u5143\u7d20\u7684\u6837\u5f0f\u3002<\/li>\n\n\n\n
    • \u52a8\u6001\u63d2\u5165\u6837\u5f0f\u8868<\/strong>\uff1a\u901a\u8fc7\u521b\u5efa\u548c\u63d2\u5165 <style><\/code> \u5143\u7d20\uff0c\u53ef\u4ee5\u52a8\u6001\u5730\u5e94\u7528\u65b0\u7684 CSS \u6837\u5f0f\u3002<\/li>\n<\/ul>\n\n\n\n
      \u901a\u8fc7\u8fd9\u4e9b\u65b9\u6cd5\uff0cJavaScript \u4e3a\u6211\u4eec\u63d0\u4f9b\u4e86\u6781\u5927\u7684\u7075\u6d3b\u6027\uff0c\u53ef\u4ee5\u5728\u7f51\u9875\u4e2d\u52a8\u6001\u5730\u8c03\u6574\u6837\u5f0f\uff0c\u4ece\u800c\u5b9e\u73b0\u4ea4\u4e92\u5f0f\u548c\u54cd\u5e94\u5f0f\u7684\u8bbe\u8ba1\u3002<\/p>\n\n\n\n
      \u66f4\u591a\u8be6\u7ec6\u6587\u7ae0\u8bf7\u5173\u6ce8\u5176\u4ed6\u76f8\u5173\u6587\u7ae0\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
      \u901a\u8fc7 JavaScript \u64cd\u4f5c HTML DOM\uff0c\u6211\u4eec\u4e0d\u4ec5\u53ef\u4ee5\u6539\u53d8\u7f51\u9875\u7684\u5185\u5bb9\uff0c\u8fd8\u53ef\u4ee5\u52a8\u6001\u5730\u4fee\u6539\u7f51\u9875\u7684\u6837\u5f0f\uff08C […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[46],"tags":[],"class_list":["post-2106","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/comments?post=2106"}],"version-history":[{"count":1,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2106\/revisions"}],"predecessor-version":[{"id":2107,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/posts\/2106\/revisions\/2107"}],"wp:attachment":[{"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/media?parent=2106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/categories?post=2106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laixuexila.com\/index.php\/wp-json\/wp\/v2\/tags?post=2106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}