{"id":53236,"date":"2024-12-03T17:02:42","date_gmt":"2024-12-03T09:02:42","guid":{"rendered":"https:\/\/fwq.ai\/blog\/53236\/"},"modified":"2024-12-03T17:02:42","modified_gmt":"2024-12-03T09:02:42","slug":"cssseudo-classes-and-pseudo-elements-an-in-depth-look","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/53236\/","title":{"rendered":"CSSseudo-Classes and Pseudo-Elements: An In-Depth Look"},"content":{"rendered":"

<\/b> <\/p>\n

CSSseudo-Classes and Pseudo-Elements: An In-Depth Look<\/h1>\n

<\/i>\u6536\u85cf<\/span> <\/p>\n

\u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aCSSseudo-Classes and Pseudo-Elements: An In-Depth Look\u300b<\/span>\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230<\/span>\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01<\/p>\n

\u7b80\u4ecb<\/p>\n

\u563f\uff0c\u4e86\u4e0d\u8d77\u7684\u4eba\u4eec\u3002\u4eca\u5929\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u7814\u7a76 css \u4e2d\u7684\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u7684\u4e16\u754c\u3002\u8fd9\u4e9b\u662f\u6211\u4eec css \u5de5\u5177\u5305\u4e2d\u7684\u5f3a\u5927\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u4ee5\u72ec\u7279\u7684\u65b9\u5f0f\u5b9a\u4f4d\u548c\u8bbe\u8ba1\u5143\u7d20\uff0c\u4f7f\u6211\u4eec\u7684\u5de5\u4f5c\u66f4\u52a0\u9ad8\u6548\uff0c\u4f7f\u6211\u4eec\u7684\u7f51\u9875\u66f4\u52a0\u52a8\u6001\u3002<\/p>\n

\u6211\u4eec\u5c06\u4ece\u57fa\u7840\u77e5\u8bc6\u5f00\u59cb\uff0c\u4e86\u89e3\u4ec0\u4e48\u662f\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\u3002\u7136\u540e\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u60a8\u5728\u7f16\u7801\u4e4b\u65c5\u4e2d\u4f1a\u9047\u5230\u7684\u4e00\u4e9b\u6700\u5e38\u89c1\u7684\u95ee\u9898\u3002\u4e0d\u4ec5\u5982\u6b64\uff0c\u6211\u4eec\u8fd8\u5c06\u67e5\u770b\u5927\u91cf\u7f16\u7801\u793a\u4f8b\uff0c\u4ee5\u4e86\u89e3\u8fd9\u4e9b\u6982\u5ff5\u7684\u5b9e\u9645\u5e94\u7528\uff01<\/p>\n

\u6211\u4eec\u5c06\u8fdb\u4e00\u6b65\u533a\u5206\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\uff0c\u7a81\u51fa\u5b83\u4eec\u7684\u533a\u522b\u548c\u76f8\u4f3c\u4e4b\u5904\u3002\u6700\u540e\uff0c\u6211\u4eec\u5c06\u770b\u5230\u4e00\u4e9b\u5b9e\u9645\u5e94\u7528\u548c\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n

\u6240\u4ee5\uff0c\u559d\u676f\u5496\u5561\uff08\u6216\u8336\uff09\uff0c\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\uff01<\/p>\n

\"CSSseudo-Classes<\/p>\n

\u7406\u89e3\u4f2a\u7c7b <\/h3>\n

\u5b9a\u4e49\u548c\u7528\u6cd5<\/strong> <\/h4>\n

\u4f2a\u7c7b\u662f\u5173\u952e\u5b57\uff0c\u5141\u8bb8\u60a8\u6839\u636e\u5143\u7d20\u7684\u72b6\u6001\uff08\u4f8b\u5982\uff1ahover\uff09\u6216\u5b83\u4eec\u4e0e\u5176\u4ed6\u5143\u7d20\u7684\u5173\u7cfb\uff08\u4f8b\u5982\uff1afirst-child\uff09\u6765\u9009\u62e9\u5143\u7d20\u5e76\u8bbe\u7f6e\u5143\u7d20\u6837\u5f0f\u3002\u5b83\u4eec\u4ee5\u5192\u53f7\u4e3a\u524d\u7f00\uff0c\u5e76\u6dfb\u52a0\u5230 css \u4e2d\u7684\u9009\u62e9\u5668\u4e2d\u3002<\/p>\n

\u5e38\u7528\u4f2a\u7c7b<\/strong> <\/h4>\n

\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u4f2a\u7c7b\uff1a<\/p>\n

    \n
  1. \n

    :hover – \u5f53\u7528\u6237\u5c06\u9f20\u6807\u60ac\u505c\u5728\u67d0\u4e2a\u5143\u7d20\u4e0a\u65f6\u9009\u62e9\u8be5\u5143\u7d20\u3002<\/p>\n<\/li>\n

  2. \n

    :active – \u5728\u6fc0\u6d3b\u72b6\u6001\u4e0b\u9009\u62e9\u4e00\u4e2a\u5143\u7d20\uff0c\u4f8b\u5982\u5f53\u7528\u6237\u5355\u51fb\u6309\u94ae\u65f6\u3002<\/p>\n<\/li>\n

  3. \n

    :first-child – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n<\/li>\n

  4. \n

    :last-child – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n<\/li>\n

  5. \n

    :nth-child(n) – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u7b2c n \u4e2a\u5b50\u5143\u7d20\u3002<\/p>\n<\/li>\n<\/ol>\n

    \u4f2a\u7c7b\u7684\u7f16\u7801\u793a\u4f8b<\/strong> <\/h4>\n

    \u521d\u5b66\u8005\u793a\u4f8b<\/em><\/p>\n

    \u4ee5\u4e0b\u662f\u5c06\u9f20\u6807\u60ac\u505c\u5728\u94fe\u63a5\u4e0a\u65f6\u66f4\u6539\u94fe\u63a5\u989c\u8272\u7684\u65b9\u6cd5\uff1a<\/p>\n

    a:hover { color: red;}\n<\/pre>\n
    \u4e2d\u95f4\u793a\u4f8b<\/em><\/p>\n
    \u6b64\u793a\u4f8b\u9009\u62e9 ul \u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u5e76\u66f4\u6539\u5176\u989c\u8272\uff1a<\/p>\n
    ul li:first-child { color: green;}\n<\/pre>\n
    \u9ad8\u7ea7\u793a\u4f8b<\/em><\/p>\n
    \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 :nth-child(n) \u4f2a\u7c7b\u5bf9\u8868\u7684\u5947\u6570\u884c\u548c\u5076\u6570\u884c\u8fdb\u884c\u4e0d\u540c\u7684\u6837\u5f0f\uff1a<\/p>\n
    tr:nth-child(even) { \n   background: #f2f2f2;\n}\n\ntr:nth-child(odd) { \n   background: #ddd;\n}\n<\/pre>\n
    \u8bf7\u8bb0\u4f4f\uff0c\u4f2a\u7c7b\u53ef\u4ee5\u6781\u5927\u5730\u589e\u5f3a\u60a8\u7684 css \u5e76\u4f7f\u60a8\u7684\u7f51\u9875\u66f4\u52a0\u52a8\u6001\u3002\u5728\u60a8\u7684\u9879\u76ee\u4e2d\u7ec3\u4e60\u4f7f\u7528\u5b83\u4eec\uff0c\u4ee5\u9002\u5e94\u5b83\u4eec\u7684\u8bed\u6cd5\u548c\u884c\u4e3a\u3002<\/p>\n
    \u7ee7\u7eed\u9605\u8bfb\uff0c\u6211\u4eec\u5c06\u6709\u66f4\u591a\u73b0\u5b9e\u4e16\u754c\u7684\u4f8b\u5b50\u3002<\/em><\/p>\n
     \u7406\u89e3\u4f2a\u5143\u7d20 <\/h3>\n
     \u5b9a\u4e49\u548c\u7528\u6cd5<\/strong> <\/h4>\n
    \u4f2a\u5143\u7d20\u662f css \u4e2d\u7528\u4e8e\u8bbe\u7f6e\u5143\u7d20\u7279\u5b9a\u90e8\u5206\u6837\u5f0f\u7684\u5173\u952e\u5b57\u3002\u5b83\u4eec\u4ee5\u4e24\u4e2a\u5192\u53f7\u4e3a\u524d\u7f00\u5e76\u6dfb\u52a0\u5230\u9009\u62e9\u5668\u4e2d\u3002<\/p>\n
     \u5e38\u7528\u4f2a\u5143\u7d20<\/strong> <\/h4>\n
    \u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u4f2a\u5143\u7d20\uff1a<\/p>\n
      \n
    1. \n
      ::before – \u5728\u5143\u7d20\u5185\u5bb9\u4e4b\u524d\u63d2\u5165\u5185\u5bb9\u3002<\/p>\n<\/li>\n
    2. \n
      ::after – \u5728\u5143\u7d20\u5185\u5bb9\u4e4b\u540e\u63d2\u5165\u5185\u5bb9\u3002<\/p>\n<\/li>\n
    3. \n
      ::first-letter – \u9009\u62e9\u6587\u672c\u5757\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u3002<\/p>\n<\/li>\n
    4. \n
      ::first-line – \u9009\u62e9\u6587\u672c\u5757\u7684\u7b2c\u4e00\u884c\u3002<\/p>\n<\/li>\n
    5. \n
      ::selection – \u5c06\u6837\u5f0f\u5e94\u7528\u4e8e\u7528\u6237\u7a81\u51fa\u663e\u793a\u7684\u6587\u6863\u90e8\u5206\u3002<\/p>\n<\/li>\n<\/ol>\n
       \u4f2a\u5143\u7d20\u7684\u7f16\u7801\u793a\u4f8b<\/strong> <\/h4>\n
      \u521d\u5b66\u8005\u793a\u4f8b<\/em><\/p>\n
      \u4ee5\u4e0b\u662f\u5728\u5143\u7d20\u4e4b\u524d\u63d2\u5165\u5185\u5bb9\u7684\u65b9\u6cd5\uff1a<\/p>\n
      p::before { content: \"important: \"; color: red;}\n<\/pre>\n
      \u4e2d\u95f4\u793a\u4f8b<\/em><\/p>\n
      \u6b64\u793a\u4f8b\u8bbe\u7f6e\u6bb5\u843d\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u7684\u6837\u5f0f\uff1a<\/p>\n
      p::first-letter { font-size: 20px; color: blue;}\n<\/pre>\n
      \u9ad8\u7ea7\u793a\u4f8b<\/em><\/p>\n
      \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u66f4\u6539\u7528\u6237\u9009\u62e9\u7684\u4efb\u4f55\u6587\u672c\u7684\u80cc\u666f\u989c\u8272\uff1a<\/p>\n
      ::selection { background: yellow;}\n<\/pre>\n
      \u5c31\u50cf\u4f2a\u7c7b\u4e00\u6837\uff0c\u4f2a\u5143\u7d20\u53ef\u4ee5\u4e3a\u60a8\u7684\u7f51\u9875\u6dfb\u52a0\u5f88\u591a\u6d3b\u529b\u3002\u5728\u60a8\u7684\u9879\u76ee\u4e2d\u8fdb\u884c\u8bd5\u9a8c\uff0c\u4ee5\u66f4\u597d\u5730\u4e86\u89e3\u5b83\u4eec\u7684\u7528\u6cd5\u548c\u5f71\u54cd\u3002<\/p>\n
       \u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u4e4b\u95f4\u7684\u5f02\u540c <\/h2>\n
      \u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u90fd\u5141\u8bb8\u6211\u4eec\u9009\u62e9 html \u7684\u90e8\u5206\u5e76\u8bbe\u7f6e\u5176\u6837\u5f0f\uff0c\u800c\u8fd9\u4e9b\u90e8\u5206\u4e0d\u4e00\u5b9a\u53ef\u4ee5\u901a\u8fc7\u4f20\u7edf\u9009\u62e9\u5668\u83b7\u5f97\u3002\u7136\u800c\uff0c\u5b83\u4eec\u786e\u5b9e\u6709\u4e00\u4e9b\u5173\u952e\u7684\u533a\u522b\uff1a<\/p>\n
        \n
      1. \n
        \u524d\u7f00\uff1a<\/strong> \u4f2a\u7c7b\u4ee5\u4e00\u4e2a\u5192\u53f7 (:) \u4e3a\u524d\u7f00\uff0c\u800c\u4f2a\u5143\u7d20\u4ee5\u4e24\u4e2a\u5192\u53f7 (::) \u4e3a\u524d\u7f00\u3002<\/p>\n<\/li>\n
      2. \n
        \u7528\u9014\uff1a<\/strong> \u4f2a\u7c7b\u4e3b\u8981\u7528\u4e8e\u5b9a\u4e49\u5143\u7d20\u7684\u7279\u6b8a\u72b6\u6001\uff0c\u4f8b\u5982 :hover \u6216 :active\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u4f2a\u5143\u7d20\u7528\u4e8e\u8bbe\u7f6e\u5143\u7d20\u7684\u67d0\u4e9b\u90e8\u5206\u7684\u6837\u5f0f\uff0c\u4f8b\u5982 ::before \u6216 ::after\u3002<\/p>\n<\/li>\n
      3. \n
        \u5b9e\u4f8b\u6570\u91cf\uff1a<\/strong>\u4f2a\u7c7b\u53ef\u4ee5\u5728\u5355\u4e2a\u5143\u7d20\u5185\u591a\u6b21\u4f7f\u7528\uff0c\u800c\u4f2a\u5143\u7d20\u53ea\u80fd\u4f7f\u7528\u4e00\u6b21\u3002<\/p>\n<\/li>\n<\/ol>\n
        \u5c3d\u7ba1\u5b58\u5728\u8fd9\u4e9b\u5dee\u5f02\uff0c\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u90fd\u662f css \u4e2d\u5fc5\u4e0d\u53ef\u5c11\u7684\u5de5\u5177\uff0c\u53ef\u4ee5\u4f7f\u60a8\u7684\u6837\u5f0f\u8868\u66f4\u52a0\u52a8\u6001\u548c\u9ad8\u6548\u3002<\/p>\n
         \u5b9e\u9645\u4f8b\u5b50 <\/h2>\n
        \u793a\u4f8b 1\uff1a\u4f7f\u7528\u4f2a\u7c7b\u521b\u5efa\u5177\u6709\u60ac\u505c\u548c\u6d3b\u52a8\u72b6\u6001\u7684\u6309\u94ae<\/strong><\/p>\n
        codepen \u793a\u4f8b<\/p>\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 :hover \u548c :active \u4f2a\u7c7b\u5728\u7528\u6237\u5c06\u9f20\u6807\u60ac\u505c\u5728\u6309\u94ae\u4e0a\u6216\u5355\u51fb\u6309\u94ae\u65f6\u66f4\u6539\u6309\u94ae\u7684\u80cc\u666f\u989c\u8272\u3002\u8fd9\u901a\u8fc7\u63d0\u4f9b\u7528\u6237\u4ea4\u4e92\u7684\u89c6\u89c9\u53cd\u9988\u6765\u589e\u5f3a\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n
        \u793a\u4f8b 2\uff1a\u4f7f\u7528<\/strong> ::before \u548c ::after \u4f2a\u5143\u7d20\u521b\u5efa\u5de5\u5177\u63d0\u793a<\/p>\n
        codepen \u793a\u4f8b<\/p>\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 ::before \u4f2a\u5143\u7d20\u521b\u5efa\u4e00\u4e2a\u5de5\u5177\u63d0\u793a\uff0c\u5f53\u7528\u6237\u5c06\u9f20\u6807\u60ac\u505c\u5728 .tooltip \u5143\u7d20\u4e0a\u65f6\u4f1a\u663e\u793a\u8be5\u5de5\u5177\u63d0\u793a\u3002\u5de5\u5177\u63d0\u793a\u6587\u672c\u662f\u4f7f\u7528 content \u5c5e\u6027\u8bbe\u7f6e\u7684\uff0c\u6211\u4eec\u4f7f\u7528 :hover \u4f2a\u7c7b\u4f7f\u5de5\u5177\u63d0\u793a\u5728\u7528\u6237\u5c06\u9f20\u6807\u60ac\u505c\u5728\u5143\u7d20\u4e0a\u65f6\u53ef\u89c1\u3002<\/p>\n
        \u793a\u4f8b 3\uff1a\u4f7f\u7528\u4f2a\u5143\u7d20\u8bbe\u7f6e\u6bb5\u843d\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u548c\u7b2c\u4e00\u884c\u7684\u6837\u5f0f<\/strong><\/p>\n
        codepen \u793a\u4f8b<\/p>\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 ::first-letter \u548c ::first-line \u4f2a\u5143\u7d20\u6765\u8bbe\u7f6e\u6bb5\u843d\u7684\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u548c\u7b2c\u4e00\u884c\u7684\u6837\u5f0f\u3002\u7b2c\u4e00\u4e2a\u5b57\u6bcd\u7684\u5927\u5c0f\u589e\u52a0\u5e76\u5448\u7ea2\u8272\uff0c\u7b2c\u4e00\u884c\u52a0\u4e0b\u5212\u7ebf\u5e76\u8f6c\u6362\u4e3a\u5927\u5199\u3002\u8fd9\u53ef\u7528\u4e8e\u4e3a\u60a8\u7684\u6587\u672c\u5185\u5bb9\u6dfb\u52a0\u5f3a\u8c03\u6216\u98ce\u683c\u98ce\u683c\u3002<\/p>\n
        \u793a\u4f8b 4\uff1a\u4f7f\u7528\u4f2a\u7c7b\u521b\u5efa 3d \u6309\u94ae\u6548\u679c<\/strong><\/p>\n
        codepen \u793a\u4f8b<\/p>\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 :active \u4f2a\u7c7b\u4e3a\u6309\u94ae\u63d0\u4f9b 3d \u6548\u679c\u3002\u6309\u4e0b\u6309\u94ae\u65f6\uff0c\u5b83\u4f1a\u5411\u4e0b\u79fb\u52a8\uff0c\u4ea7\u751f\u6df1\u5ea6\u9519\u89c9\u3002<\/p>\n
        \u793a\u4f8b 5\uff1a\u4f7f\u7528\u4f2a\u5143\u7d20\u521b\u5efa\u6253\u5b57\u673a\u6548\u679c<\/strong><\/p>\n
        codepen \u793a\u4f8b<\/p>\n
        \u5728\u6b64\u793a\u4f8b\u4e2d\uff0c::before \u4f2a\u5143\u7d20\u7528\u4e8e\u63d2\u5165\u6587\u672c\u201chello, world!\u201d\uff0c::after \u4f2a\u5143\u7d20\u7528\u4e8e\u521b\u5efa\u95ea\u70c1\u7684\u5149\u6807\u3002 @keyframes \u89c4\u5219\u7528\u4e8e\u9010\u6e10\u6539\u53d8 css \u6837\u5f0f\uff0c\u521b\u5efa\u6253\u5b57\u52a8\u753b\u3002<\/p>\n
         \u8981\u70b9\u548c\u6700\u4f73\u5b9e\u8df5 <\/h2>\n
          \n
        1. \n
          \u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u662f\u5f3a\u5927\u7684\u5de5\u5177\uff1a<\/strong>\u5b83\u4eec\u8ba9\u6211\u4eec\u53ef\u4ee5\u6839\u636e\u5143\u7d20\u7684\u72b6\u6001\u3001\u4e0e\u5176\u4ed6\u5143\u7d20\u7684\u5173\u7cfb\u6216\u5143\u7d20\u7684\u7279\u5b9a\u90e8\u5206\u6765\u9009\u62e9\u5143\u7d20\u548c\u8bbe\u8ba1\u5143\u7d20\u7684\u6837\u5f0f\u3002<\/p>\n<\/li>\n
        2. \n
          \u524d\u7f00\u5f88\u91cd\u8981\uff1a<\/strong>\u4f2a\u7c7b\u4f7f\u7528\u5355\u5192\u53f7\u524d\u7f00\uff0c\u800c\u4f2a\u5143\u7d20\u4f7f\u7528\u53cc\u5192\u53f7\u524d\u7f00\u3002<\/p>\n<\/li>\n
        3. \n
          \u7528\u4f8b\u4e0d\u540c\uff1a<\/strong>\u4f2a\u7c7b\u4e3b\u8981\u7528\u4e8e\u6839\u636e\u5143\u7d20\u7684\u72b6\u6001\u6216\u4e0e\u5176\u4ed6\u5143\u7d20\u7684\u5173\u7cfb\u6765\u8bbe\u7f6e\u5143\u7d20\u7684\u6837\u5f0f\u3002\u53e6\u4e00\u65b9\u9762\uff0c\u4f2a\u5143\u7d20\u5141\u8bb8\u6211\u4eec\u8bbe\u7f6e\u5143\u7d20\u7684\u7279\u5b9a\u90e8\u5206\u7684\u6837\u5f0f\u3002<\/p>\n<\/li>\n
        4. \n
          \u719f\u80fd\u751f\u5de7\uff1a<\/strong>\u5728\u9879\u76ee\u4e2d\u4f7f\u7528\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u8d8a\u591a\uff0c\u60a8\u5c31\u4f1a\u5bf9\u5b83\u4eec\u7684\u8bed\u6cd5\u548c\u884c\u4e3a\u8d8a\u719f\u6089\u3002<\/p>\n<\/li>\n
        5. \n
          \u589e\u5f3a\u7528\u6237\u4f53\u9a8c\uff1a<\/strong>\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u53ef\u4ee5\u901a\u8fc7\u63d0\u4f9b\u89c6\u89c9\u63d0\u793a\u548c\u53cd\u9988\u6765\u6781\u5927\u5730\u589e\u5f3a\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/li>\n<\/ol>\n
           \u7ed3\u8bba <\/h2>\n
          \u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u662f css \u4e2d\u975e\u5e38\u5b9d\u8d35\u7684\u5de5\u5177\u3002\u5b83\u4eec\u4f7f\u6211\u4eec\u80fd\u591f\u8d85\u8d8a\u4f20\u7edf\u9009\u62e9\u5668\u7684\u9650\u5236\uff0c\u5e76\u4ee5\u72ec\u7279\u548c\u52a8\u6001\u7684\u65b9\u5f0f\u8bbe\u8ba1\u6211\u4eec\u7684\u7f51\u9875\u3002\u901a\u8fc7\u4e86\u89e3\u5b83\u4eec\u7684\u5dee\u5f02\u4ee5\u53ca\u4f55\u65f6\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\uff0c\u6211\u4eec\u53ef\u4ee5\u521b\u5efa\u66f4\u5177\u4ea4\u4e92\u6027\u548c\u5438\u5f15\u529b\u7684\u7528\u6237\u754c\u9762\u3002<\/p>\n
          \u7ee7\u7eed\u5c1d\u8bd5\u5b83\u4eec\uff0c\u770b\u770b\u5b83\u4eec\u5982\u4f55\u589e\u5f3a\u60a8\u7684\u4e0b\u4e00\u4e2a\u9879\u76ee\uff01<\/p>\n
          \n
          ? \u5927\u5bb6\u597d\uff0c\u6211\u662f eleftheria\uff0c\u793e\u533a\u7ecf\u7406\uff0c<\/strong> \u5f00\u53d1\u4eba\u5458\u3001\u516c\u5171\u6f14\u8bb2\u8005\u548c\u5185\u5bb9\u521b\u5efa\u8005\u3002<\/p>\n
          ?\u5982\u679c\u60a8\u559c\u6b22\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf7\u8003\u8651\u5206\u4eab\u3002<\/p>\n
          ? \u6240\u6709\u94fe\u63a5<\/strong> | x<\/strong> | \u9886\u82f1<\/strong><\/p>\n
          \u7406\u8bba\u8981\u638c\u63e1\uff0c\u5b9e\u64cd\u4e0d\u80fd\u843d\uff01\u4ee5\u4e0a\u5173\u4e8e\u300aCSSseudo-Classes and Pseudo-Elements: An In-Depth Look\u300b\u7684\u8be6\u7ec6\u4ecb\u7ecd\uff0c\u5927\u5bb6\u90fd\u638c\u63e1\u4e86\u5427\uff01\u5982\u679c\u60f3\u8981\u7ee7\u7eed\u63d0\u5347\u81ea\u5df1\u7684\u80fd\u529b\uff0c\u90a3\u4e48\u5c31\u6765\u5173\u6ce8\u7c73\u4e91\u516c\u4f17\u53f7\u5427\uff01<\/p>\n
                \u7248\u672c\u58f0\u660e \u672c\u6587\u8f6c\u8f7d\u4e8e\uff1adev.to \u5982\u6709\u4fb5\u72af\uff0c\u8bf7\u8054\u7cfb\u5220\u9664    <\/p>\n
          \n
          <\/dt>\n
          \n   AI \u8ba9\u751f\u6d3b\u66f4\u8f7b\u677e\uff1a\u4e9a\u9a6c\u900a\u8bb2\u89e3 VAPR \u89c6\u89c9\u8f85\u52a9\u5305\u88f9\u53d6\u4ef6\u7cfb\u7edf\uff0c\u5230 2025 \u5e74\u90e8\u7f72 1000 \u8f86 Rivian \u7535\u52a8\u9001\u8d27\u8f66\n <\/dd>\n<\/dl>\n","protected":false},"excerpt":{"rendered":"
          CSSseudo-Classes and Pseudo-Elements: An In-Depth Look \u6536\u85cf \u4ece\u73b0\u5728\u5f00\u59cb\uff0c\u6211\u4eec\u8981\u52aa\u529b\u5b66\u4e60\u5566\uff01\u4eca\u5929\u6211\u7ed9\u5927\u5bb6\u5e26\u6765\u300aCSSseudo-Classes and Pseudo-Elements: An In-Depth Look\u300b\uff0c\u611f\u5174\u8da3\u7684\u670b\u53cb\u8bf7\u7ee7\u7eed\u770b\u4e0b\u53bb\u5427\uff01\u4e0b\u6587\u4e2d\u7684\u5185\u5bb9\u6211\u4eec\u4e3b\u8981\u4f1a\u6d89\u53ca\u5230\u7b49\u7b49\u77e5\u8bc6\u70b9\uff0c\u5982\u679c\u5728\u9605\u8bfb\u672c\u6587\u8fc7\u7a0b\u4e2d\u6709\u9047\u5230\u4e0d\u6e05\u695a\u7684\u5730\u65b9\uff0c\u6b22\u8fce\u7559\u8a00\u5440\uff01\u6211\u4eec\u4e00\u8d77\u8ba8\u8bba\uff0c\u4e00\u8d77\u5b66\u4e60\uff01 \u7b80\u4ecb \u563f\uff0c\u4e86\u4e0d\u8d77\u7684\u4eba\u4eec\u3002\u4eca\u5929\uff0c\u6211\u4eec\u5c06\u6df1\u5165\u7814\u7a76 css \u4e2d\u7684\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u7684\u4e16\u754c\u3002\u8fd9\u4e9b\u662f\u6211\u4eec css \u5de5\u5177\u5305\u4e2d\u7684\u5f3a\u5927\u5de5\u5177\uff0c\u53ef\u4ee5\u5e2e\u52a9\u6211\u4eec\u4ee5\u72ec\u7279\u7684\u65b9\u5f0f\u5b9a\u4f4d\u548c\u8bbe\u8ba1\u5143\u7d20\uff0c\u4f7f\u6211\u4eec\u7684\u5de5\u4f5c\u66f4\u52a0\u9ad8\u6548\uff0c\u4f7f\u6211\u4eec\u7684\u7f51\u9875\u66f4\u52a0\u52a8\u6001\u3002 \u6211\u4eec\u5c06\u4ece\u57fa\u7840\u77e5\u8bc6\u5f00\u59cb\uff0c\u4e86\u89e3\u4ec0\u4e48\u662f\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\u4ee5\u53ca\u5982\u4f55\u4f7f\u7528\u5b83\u4eec\u3002\u7136\u540e\uff0c\u6211\u4eec\u5c06\u63a2\u8ba8\u60a8\u5728\u7f16\u7801\u4e4b\u65c5\u4e2d\u4f1a\u9047\u5230\u7684\u4e00\u4e9b\u6700\u5e38\u89c1\u7684\u95ee\u9898\u3002\u4e0d\u4ec5\u5982\u6b64\uff0c\u6211\u4eec\u8fd8\u5c06\u67e5\u770b\u5927\u91cf\u7f16\u7801\u793a\u4f8b\uff0c\u4ee5\u4e86\u89e3\u8fd9\u4e9b\u6982\u5ff5\u7684\u5b9e\u9645\u5e94\u7528\uff01 \u6211\u4eec\u5c06\u8fdb\u4e00\u6b65\u533a\u5206\u4f2a\u7c7b\u548c\u4f2a\u5143\u7d20\uff0c\u7a81\u51fa\u5b83\u4eec\u7684\u533a\u522b\u548c\u76f8\u4f3c\u4e4b\u5904\u3002\u6700\u540e\uff0c\u6211\u4eec\u5c06\u770b\u5230\u4e00\u4e9b\u5b9e\u9645\u5e94\u7528\u548c\u6700\u4f73\u5b9e\u8df5\u3002 \u6240\u4ee5\uff0c\u559d\u676f\u5496\u5561\uff08\u6216\u8336\uff09\uff0c\u8ba9\u6211\u4eec\u5f00\u59cb\u5427\uff01 \u7406\u89e3\u4f2a\u7c7b \u5b9a\u4e49\u548c\u7528\u6cd5 \u4f2a\u7c7b\u662f\u5173\u952e\u5b57\uff0c\u5141\u8bb8\u60a8\u6839\u636e\u5143\u7d20\u7684\u72b6\u6001\uff08\u4f8b\u5982\uff1ahover\uff09\u6216\u5b83\u4eec\u4e0e\u5176\u4ed6\u5143\u7d20\u7684\u5173\u7cfb\uff08\u4f8b\u5982\uff1afirst-child\uff09\u6765\u9009\u62e9\u5143\u7d20\u5e76\u8bbe\u7f6e\u5143\u7d20\u6837\u5f0f\u3002\u5b83\u4eec\u4ee5\u5192\u53f7\u4e3a\u524d\u7f00\uff0c\u5e76\u6dfb\u52a0\u5230 css \u4e2d\u7684\u9009\u62e9\u5668\u4e2d\u3002 \u5e38\u7528\u4f2a\u7c7b \u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u7528\u7684\u4f2a\u7c7b\uff1a :hover – \u5f53\u7528\u6237\u5c06\u9f20\u6807\u60ac\u505c\u5728\u67d0\u4e2a\u5143\u7d20\u4e0a\u65f6\u9009\u62e9\u8be5\u5143\u7d20\u3002 :active – \u5728\u6fc0\u6d3b\u72b6\u6001\u4e0b\u9009\u62e9\u4e00\u4e2a\u5143\u7d20\uff0c\u4f8b\u5982\u5f53\u7528\u6237\u5355\u51fb\u6309\u94ae\u65f6\u3002 :first-child – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u7b2c\u4e00\u4e2a\u5b50\u5143\u7d20\u3002 :last-child – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u5b50\u5143\u7d20\u3002 :nth-child(n) – \u9009\u62e9\u7236\u5143\u7d20\u4e2d\u7684\u7b2c n \u4e2a\u5b50\u5143\u7d20\u3002 \u4f2a\u7c7b\u7684\u7f16\u7801\u793a\u4f8b \u521d\u5b66\u8005\u793a\u4f8b \u4ee5\u4e0b\u662f\u5c06\u9f20\u6807\u60ac\u505c\u5728\u94fe\u63a5\u4e0a\u65f6\u66f4\u6539\u94fe\u63a5\u989c\u8272\u7684\u65b9\u6cd5\uff1a a:hover { color: red;} \u4e2d\u95f4\u793a\u4f8b \u6b64\u793a\u4f8b\u9009\u62e9 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-53236","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53236","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=53236"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/53236\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=53236"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=53236"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=53236"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}