{"id":28177,"date":"2024-11-24T11:40:52","date_gmt":"2024-11-24T03:40:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/28177\/"},"modified":"2024-11-24T11:40:52","modified_gmt":"2024-11-24T03:40:52","slug":"%e7%90%86%e8%a7%a3-css-%e4%b8%ad-focus-%e5%92%8c-focus-visible-%e4%b9%8b%e9%97%b4%e7%9a%84%e5%8c%ba%e5%88%ab","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/28177\/","title":{"rendered":"\u7406\u89e3 CSS \u4e2d `:focus` \u548c `:focus-visible` \u4e4b\u95f4\u7684\u533a\u522b"},"content":{"rendered":"

\"\u7406\u89e3<\/p>\n

\u4e86\u89e3 \u4e2d :focus \u548c :focus-visible \u4e4b\u95f4\u7684 <\/h2>\n

\u6211\u5df2\u7ecf\u4e86\u89e3\u4e86\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u7684\u91cd\u8981\u6027\uff0c\u6240\u4ee5\u6211\u77e5\u9053\u805a\u7126\u5143\u7d20\u7684\u89c6\u89c9\u6307\u793a\u975e\u5e38\u91cd\u8981\u3002\u4f46\u4f17\u6240\u5468\u77e5\u7684 :focus \u4f2a\u7c7b\u5e76\u4e0d\u603b\u662f\u6700\u9002\u5408\u8fd9\u9879\u5de5\u4f5c\u3002\u8fd9\u5c31\u662f :focus-visible \u7684\u7528\u6b66\u4e4b\u5730\u3002\u8ba9\u6211\u4eec\u770b\u770b\u8fd9\u4e24\u4e2a\u4f2a\u7c7b\u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u5e76\u63a2\u7d22\u6709\u6548\u4f7f\u7528\u5b83\u4eec\u7684\u6700\u4f73\u5b9e\u8df5\u3002<\/p>\n

\u4ec0\u4e48\u662f :focus \u4f2a\u7c7b\uff1f <\/h2>\n

:focus \u4f2a\u7c7b\u662f\u4e00\u4e2a css \u9009\u62e9\u5668\uff0c\u5b83\u5c06\u6837\u5f0f\u5e94\u7528\u4e8e\u4efb\u4f55\u63a5\u6536\u7126\u70b9\u7684\u5143\u7d20\uff0c\u65e0\u8bba\u7126\u70b9\u662f\u5982\u4f55\u89e6\u53d1\u7684\u3002\u8fd9\u5305\u62ec\u6765\u81ea\u952e\u76d8\u5bfc\u822a\u3001\u9f20\u6807\u5355\u51fb\u548c\u89e6\u6478\u4ea4\u4e92\u7684\u7126\u70b9\u4e8b\u4ef6\u3002<\/p>\n

:focus \u7684\u7528\u6cd5\u793a\u4f8b <\/h3>\n
button:focus {\n  outline: 2px solid blue;\n}\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u6b64\u793a\u4f8b\u4e2d\uff0c\u53ea\u8981\u6309\u94ae\u83b7\u5f97\u7126\u70b9\uff0c\u65e0\u8bba\u7528\u6237\u662f\u4f7f\u7528\u9f20\u6807\u5355\u51fb\u5b83\u3001\u5728\u89e6\u6478\u5c4f\u4e0a\u70b9\u51fb\u5b83\u8fd8\u662f\u4f7f\u7528\u952e\u76d8\u5bfc\u822a\u5230\u5b83\uff0c\u8be5\u6309\u94ae\u90fd\u4f1a\u663e\u793a\u84dd\u8272\u8f6e\u5ed3\u3002<\/p>\n
 \u4ec0\u4e48\u662f :focus-visible \u4f2a\u7c7b\uff1f <\/h2>\n
:focus-visible \u4f2a\u7c7b\u66f4\u52a0\u4e13\u4e1a\u3002\u4ec5\u5f53\u6d4f\u89c8\u5668\u786e\u5b9a\u7126\u70b9\u5e94\u8be5\u53ef\u89c1\u65f6\uff0c\u5b83\u624d\u5c06\u6837\u5f0f\u5e94\u7528\u4e8e\u5143\u7d20\u3002\u5f53\u7528\u6237\u901a\u8fc7\u952e\u76d8\u6216\u8f85\u52a9\u6280\u672f\u800c\u4e0d\u662f\u901a\u8fc7\u9f20\u6807\u6216\u89e6\u6478\u8f93\u5165\u8fdb\u884c\u5bfc\u822a\u65f6\uff0c\u901a\u5e38\u4f1a\u53d1\u751f\u8fd9\u79cd\u60c5\u51b5\u3002<\/p>\n
\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n
 :focus-visible \u7684\u7528\u6cd5\u793a\u4f8b <\/h3>\n
button:focus-visible {\n  outline: 2px solid blue;\n}\n<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u8fd9\u91cc\uff0c\u5f53\u901a\u8fc7\u952e\u76d8\u5bfc\u822a\u6216\u5176\u4ed6\u901a\u5e38\u9700\u8981\u53ef\u89c1\u7126\u70b9\u6307\u793a\u5668\u7684\u8f93\u5165\u65b9\u6cd5\u83b7\u5f97\u7126\u70b9\u65f6\uff0c\u6309\u94ae\u53ea\u4f1a\u663e\u793a\u84dd\u8272\u8f6e\u5ed3\u3002<\/p>\n
 :focus \u548c :focus-visible \u4e4b\u95f4\u7684\u4e3b\u8981\u533a\u522b <\/h2>\n
 \uff1a\u91cd\u70b9 <\/h3>\n
    \n
  •  \u884c\u4e3a\uff1a<\/strong> \u9002\u7528\u4e8e\u4efb\u4f55\u63a5\u6536\u7126\u70b9\u7684\u5143\u7d20\uff0c\u65e0\u8bba\u8f93\u5165\u6cd5\u5982\u4f55\u3002<\/li>\n
  •  \u7528\u4f8b\uff1a<\/strong>\u786e\u4fdd\u4e0e\u5143\u7d20\u7684\u6240\u6709\u4ea4\u4e92\u90fd\u4ee5\u89c6\u89c9\u65b9\u5f0f\u6307\u793a\uff0c\u65e0\u8bba\u662f\u901a\u8fc7\u9f20\u6807\u3001\u952e\u76d8\u8fd8\u662f\u89e6\u6478\u3002<\/li>\n<\/ul>\n
     :\u7126\u70b9-\u53ef\u89c1 <\/h3>\n
      \n
    •  \u884c\u4e3a\uff1a<\/strong> \u4ec5\u5f53\u7126\u70b9\u53ef\u89c1\u65f6\u5e94\u7528\u6837\u5f0f\uff0c\u4f8b\u5982\u4f7f\u7528\u952e\u76d8\u6216\u8f85\u52a9\u6280\u672f\u3002<\/li>\n
    •  \u7528\u4f8b\uff1a<\/strong>\u975e\u5e38\u9002\u5408\u60a8\u53ea\u60f3\u5411\u952e\u76d8\u548c\u8f85\u52a9\u6280\u672f\u7528\u6237\u63d0\u4f9b\u7126\u70b9\u6307\u793a\u5668\uff0c\u540c\u65f6\u907f\u514d\u4e3a\u9f20\u6807\u548c\u89e6\u6478\u7528\u6237\u63d0\u4f9b\u4e0d\u5fc5\u8981\u7684\u8f6e\u5ed3\uff08\u901a\u5e38\u662f\u8bbe\u8ba1\u6240\u9700\u7684\uff09\u7684\u573a\u666f\u3002<\/li>\n<\/ul>\n
       \u65e0\u969c\u788d\u5f71\u54cd <\/h2>\n
       \uff1a\u91cd\u70b9 <\/h3>\n
        \n
      • \u4f18\u70b9\uff1a<\/strong><\/li>\n
      • \u4fdd\u8bc1\u6240\u6709\u7528\u6237\u90fd\u53ef\u4ee5\u770b\u5230\u67d0\u4e2a\u5143\u7d20\u4f55\u65f6\u83b7\u5f97\u7126\u70b9\uff0c\u8fd9\u5bf9\u4e8e\u53ef\u8bbf\u95ee\u6027\u81f3\u5173\u91cd\u8981\u3002<\/li>\n
      • \u7f3a\u70b9\uff1a<\/strong><\/li>\n
      • \u53ef\u80fd\u4f1a\u5bfc\u81f4\u9f20\u6807\u7528\u6237\u7684\u4f53\u9a8c\u4e0d\u4f73\uff0c\u56e0\u4e3a\u5728\u9f20\u6807\u4ea4\u4e92\u8fc7\u7a0b\u4e2d\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e0d\u5fc5\u8981\u7684\u7126\u70b9\u6837\u5f0f\u3002<\/li>\n<\/ul>\n
         :\u7126\u70b9-\u53ef\u89c1 <\/h3>\n
          \n
        • \u4f18\u70b9\uff1a<\/strong><\/li>\n
        • \u4ec5\u5728\u5fc5\u8981\u65f6\u663e\u793a\u7126\u70b9\u6307\u793a\u5668\uff0c\u4ece\u800c\u589e\u5f3a\u7528\u6237\u4f53\u9a8c\uff0c\u4ece\u800c\u4e3a\u9f20\u6807\u548c\u89e6\u6478\u7528\u6237\u4fdd\u6301\u754c\u9762\u5e72\u51c0\u3002<\/li>\n
        • \u4e3a\u952e\u76d8\u548c\u8f85\u52a9\u6280\u672f\u7528\u6237\u5b9a\u5236\u4f53\u9a8c\uff0c\u4e3a\u4ed6\u4eec\u63d0\u4f9b\u6e05\u6670\u7684\u89c6\u89c9\u63d0\u793a\u3002<\/li>\n
        • \u7f3a\u70b9\uff1a<\/strong><\/li>\n
        • \u53ef\u80fd\u9700\u8981\u989d\u5916\u8003\u8651\uff0c\u4ee5\u786e\u4fdd\u7126\u70b9\u6307\u793a\u5668\u4e0d\u4f1a\u610f\u5916\u7701\u7565\uff0c\u7279\u522b\u662f\u5728\u4e0d\u652f\u6301 :focus-visible \u7684\u65e7\u6d4f\u89c8\u5668\u4e2d\u3002\n
            \n
          • \u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u60a8\u53ef\u80fd\u5e0c\u671b\u5411\u6240\u6709\u7528\u6237\u663e\u793a\u7126\u70b9\u6307\u793a\u5668\uff0c\u65e0\u8bba\u8f93\u5165\u6cd5\u5982\u4f55\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n
             \u4f7f\u7528 :focus \u548c :focus-visible \u7684\u6700\u4f73\u5b9e\u8df5 <\/h2>\n
            \u4e3a\u4e86\u5b9e\u73b0\u6700\u4f73\u7684\u53ef\u8bbf\u95ee\u6027\u548c\u7528\u6237\u4f53\u9a8c\uff0c\u5728 css \u4e2d\u7ed3\u5408\u4f7f\u7528 :focus \u548c :focus-visible \u901a\u5e38\u662f\u4e00\u4e2a\u597d\u4e3b\u610f\u3002<\/p>\n
             \u7ed3\u5408 :focus \u548c :focus-visible <\/h3>\n
            button:focus {\n  outline: none; \/* Remove default focus for all interactions *\/\n \/* maybe some subtle general focus style *\/\n}\n\nbutton:focus-visible {\n  outline: 2px solid blue; \/* Only show outline when the element was interacted with via keyboard or assistive technology *\/\n}\n<\/pre>\n
             \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
            \u8fd9\u662f\u4e00\u4e2a stackblitz \u793a\u4f8b\uff0c\u5c55\u793a\u4e86\u6b64\u7c7b\u6837\u5f0f\u7684\u5916\u89c2\uff0c\u4f9b\u60a8\u5c1d\u8bd5\u548c\u4f7f\u7528\uff1a<\/p>\n
             \u989d\u5916\u63d0\u793a <\/h3>\n
              \n
            •  \u4f7f\u7528\u952e\u76d8\u548c\u8f85\u52a9\u6280\u672f\u8fdb\u884c\u6d4b\u8bd5\uff1a<\/strong> \u786e\u4fdd\u60a8\u7684 web \u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u4f7f\u7528\u952e\u76d8\uff08tab\u3001shift + tab \u7b49\uff09\u8fdb\u884c\u5bfc\u822a\uff0c\u5e76\u4e14\u7126\u70b9\u6307\u793a\u5668\u5bf9\u4e8e\u4f9d\u8d56\u5b83\u4eec\u7684\u4eba\u662f\u53ef\u89c1\u7684\u3002\u5728\u60a8\u7684 e2e \u6d4b\u8bd5\u5957\u4ef6\u4e2d\u5305\u542b\u53ef\u8bbf\u95ee\u6027\u6d4b\u8bd5\u7edd\u4e0d\u662f\u4e00\u4e2a\u574f\u4e3b\u610f\u3002<\/li>\n
            •  \u63d0\u4f9b\u6e05\u6670\u7684\u7126\u70b9\u6307\u793a\u5668\uff1a<\/strong>\u786e\u4fdd\u7126\u70b9\u6307\u793a\u5668\u7a81\u51fa\u4e14\u6613\u4e8e\u770b\u5230\u3002\u5fae\u5999\u6216\u96be\u4ee5\u53d1\u73b0\u7684\u7126\u70b9\u6307\u793a\u5668\u53ef\u80fd\u4f1a\u4e25\u91cd\u5f71\u54cd\u4f9d\u8d56\u952e\u76d8\u5bfc\u822a\u7684\u7528\u6237\u7684\u53ef\u8bbf\u95ee\u6027\u3002<\/li>\n<\/ul>\n
               \u7ed3\u8bba <\/h2>\n
              :focus-visible \u4f2a\u7c7b\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7cbe\u7ec6\u7684\u65b9\u5f0f\u6765\u7ba1\u7406\u7126\u70b9\u6307\u793a\u5668\uff0c\u63d0\u9ad8\u53ef\u8bbf\u95ee\u6027\u548c\u7528\u6237\u4f53\u9a8c\uff0c\u7279\u522b\u662f\u5bf9\u4e8e\u952e\u76d8\u548c\u8f85\u52a9\u6280\u672f\u7528\u6237\u3002\u901a\u8fc7\u4e86\u89e3 :focus \u548c :focus-visible \u4e4b\u95f4\u7684\u5dee\u5f02\uff0c\u5e76\u5728 css \u4e2d\u5e94\u7528\u6700\u4f73\u5b9e\u8df5\uff0c\u60a8\u53ef\u4ee5\u521b\u5efa\u66f4\u6613\u4e8e\u8bbf\u95ee\u548c\u7528\u6237\u53cb\u597d\u7684 web \u5e94\u7528\u7a0b\u5e8f\u3002<\/p>\n
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