{"id":7327,"date":"2018-01-21T23:56:37","date_gmt":"2018-01-21T15:56:37","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=7327"},"modified":"2019-06-26T23:31:37","modified_gmt":"2019-06-26T15:31:37","slug":"css-focus-within-pseudo-class-selector","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/01\/css-focus-within-pseudo-class-selector\/","title":{"rendered":"\u8be6\u7ec6\u4e86\u89e3CSS :focus-within\u4f2a\u7c7b\u53ca\u5176\u4ea4\u4e92\u5e94\u7528"},"content":{"rendered":"

by zhangxinxu<\/a> from https:\/\/www.zhangxinxu.com\/wordpress\/?p=7327<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4f46\u9700\u5f97\u5230\u539f\u4f5c\u8005\u4e66\u9762\u8bb8\u53ef\uff0c\u540c\u65f6\u4fdd\u7559\u539f\u4f5c\u8005\u548c\u51fa\u5904\uff0c\u6458\u8981\u5f15\u6d41\u5219\u968f\u610f\u3002<\/p>\n

\u4e00\u3001\u4e86\u89e3CSS :focus-within\u4f2a\u7c7b<\/h3>\n

CSS :focus-within<\/code>\u4f2a\u7c7b\u9009\u62e9\u5668\u548cIE8\u5c31\u5f00\u59cb\u652f\u6301\u7684:focus<\/code>\u53ef\u4ee5\u8bf4\u662f\u8fd1\u4eb2\uff0c\u533a\u522b\u5728\u4e8e:focus<\/code>\u8868\u793a\u5f53\u524d\u5143\u7d20\u5904\u4e8efocus\u72b6\u6001\u65f6\u5019\u5e72\u561b\u5e72\u561b\uff0c\u800c:focus-within<\/code>\u8868\u793a\u5f53\u524d\u5143\u7d20\u6216\u8005\u5f53\u524d\u5143\u7d20\u7684\u5b50\u5143\u7d20\u5904\u4e8efocus\u72b6\u6001\u65f6\u5019\u5e72\u561b\u5e72\u561b\u3002<\/p>\n

\u4e3e\u4e2a\u4f8b\u5b50\uff1a<\/p>\n

form:focus {\r\n  outline: solid;\r\n}<\/pre>\n
\u8868\u793a\u4ec5\u4ec5\u5f53<form><\/code>\u5904\u4e8efocus\u72b6\u6001\u65f6\u5019\uff0c<form><\/code>\u5143\u7d20outline<\/code>\u51fa\u73b0\u3002<\/p>\n
form:focus-within {\r\n  outline: solid;\r\n}<\/pre>\n
\u8868\u793a<form><\/code>\u5143\u7d20\u81ea\u8eab\uff0c\u6216\u8005<form><\/code>\u5185\u90e8\u7684\u5b50\u5143\u7d20\u5904\u4e8efocus\u72b6\u6001\u65f6\u5019\uff0c<form><\/code>\u5143\u7d20outline<\/code>\u51fa\u73b0\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5b50\u5143\u7d20focus<\/code>\uff0c\u53ef\u4ee5\u8ba9\u4efb\u610f\u7236\u7ea7\u5143\u7d20\u6837\u5f0f\u53d1\u751f\u53d8\u5316\u3002<\/p>\n
\u8fd9\u4e2a\u65b0\u7279\u6027\u7684\u652f\u6301\uff0c\u672a\u6765\u52bf\u5fc5\u4f1a\u5e26\u6765\u66f4\u52a0\u4e30\u5bcc\u7684\u4ea4\u4e92\u5f62\u5f0f\uff0c\u4ee5\u53ca\u7279\u5b9a\u573a\u666f\u7b80\u5316\u6211\u4eec\u5b9e\u73b0\u3002<\/p>\n
\u517c\u5bb9\u6027<\/h4>\n
\u517c\u5bb9\u6027<\/a>\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\":focus-within\u517c\u5bb9\u6027\"<\/p>\n
\u8fd8\u662f\u633a\u559c\u4eba\u7684\u3002<\/p>\n
\u4e8c\u3001CSS :focus-within\u4f2a\u7c7b\u5b9e\u9645\u5e94\u7528\u4e3e\u4f8b<\/h3>\n
1. \u8868\u5355\u8f93\u5165\u52ff\u6270\u6a21\u5f0f<\/h4>\n
\u5f53\u6211\u4eec\u8868\u5355\u8f93\u5165\uff0c\u9009\u62e9\u6216\u8005\u8fdb\u884c\u4ea4\u4e92\u65f6\u5019\uff0c\u9875\u9762\u4e0a\u8868\u5355\u4ee5\u4e3a\u5176\u4ed6\u5185\u5bb9\u5168\u90e8\u90fd\u4e0d\u53ef\u89c1\u3002<\/p>\n
CSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
form {\r\n    outline: 2000px solid hsla(0,0%,100%,0);\r\n    transition: outline .2s;\r\n    position: relative;\r\n    z-index: 1;\r\n}\r\nform:focus-within {\r\n    outline: 2000px solid hsla(0,0%,100%,1);\r\n}<\/pre>\n
\u6548\u679c\u5982\u4e0b\u622a\u5c4fgif\uff1a<\/p>\n
\"form\u8868\u5355focus\u52ff\u6270\u6a21\u5f0f\u622a\u56fe\"<\/p>\n
\u5927\u5c4f\u6d4f\u89c8\u5668\u4f53\u9a8c\u66f4\u6709\u611f\u89c9\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u7684\u70b9\u51fb\u8fd9\u91cc\uff1a:focus-within\u4f2a\u7c7b\u9009\u62e9\u5668\u4e0e\u8868\u5355\u8f93\u5165\u52ff\u6270\u6a21\u5f0fdemo<\/a><\/p>\n
\u672c\u6848\u4f8b\u662f\u771f\u5b9e\u7684\u52ff\u6270\u6a21\u5f0f\u6548\u679c\u53ef\u4ee5\u653e\u5fc3\u5927\u80c6\u5728\u5b9e\u9645\u9879\u76ee\u4e2d\u4f7f\u7528\uff0c\u56e0\u4e3a\u8fd9\u662f\u4e00\u4e2a\u4f53\u9a8c\u589e\u5f3a\u7684\u4ea4\u4e92\uff0c\u5c31\u7b97\u6d4f\u89c8\u5668\u4e0d\u652f\u6301\uff0c\u5bf9\u539f\u672c\u529f\u80fd\u4e5f\u4e0d\u4f1a\u6709\u4efb\u4f55\u5f71\u54cd\u3002<\/p>\n
2. \u5e26\u8ba1\u6570\u6587\u672c\u57df\u7684focus\u9ad8\u4eae<\/h4>\n
\u5bf9\u4e8e\u5e26\u8ba1\u6570\u7684\u7ec4\u4ef6\u5316\u7684\u591a\u884c\u6587\u672c\u57df\uff0c\u8ba1\u6570\u7684\u6570\u503c\u901a\u5e38\u662f\u8bbe\u8ba1\u5728\u6587\u672c\u57df\u7684\u53f3\u4e0b\u89d2\uff0c\u8fd9\u6837\u80fd\u591f\u9002\u5e94\u5404\u79cd\u590d\u6742\u7684\u573a\u666f\u3002\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"\u5b9a\u4f4d\u5728\u53f3\u4e0b\u89d2\u7684\u8ba1\u6570\u6548\u679c\"<\/p>\n
\u7136\u800c\u8fd9\u79cd\u8bbe\u8ba1\u5bf9\u6211\u4eec\u7684\u5e03\u5c40\u5b9e\u73b0\u5e26\u6765\u7684\u6311\u6218\u3002<\/p>\n
\u6211\u4eec\u901a\u5e38\u60f3\u5230\u7684\u65b9\u6cd5\u662f\uff0c\u8ba1\u6570\u5143\u7d20\u6d6e\u5728\u4e0b\u9762\u7684textarea<\/code>\u5143\u7d20\u4e0a\u3002\u7136\u800c\u8fd9\u79cd\u65f6\u95f4\u5b58\u5728\u6709\u81f4\u547d\u7684\u4e0d\u8db3\uff0c\u90a3\u5c31\u662f\u8f93\u5165\u6846\u7684\u5185\u5bb9\u6709\u53ef\u80fd\u548c\u6211\u4eec\u7684\u8ba1\u6570\u91cd\u53e0\uff0c\u4ee5\u53ca\u51fa\u73b0\u7684\u6eda\u52a8\u6761\u548c\u6280\u672f\u6587\u672c\u91cd\u53e0\uff0c\u5982\u4e0b\u622a\u56fe\u6240\u793a\uff1a<\/p>\n
\"\u8ba1\u6570\u548c\u6eda\u52a8\u6761\u91cd\u53e0\"<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u5e26\u8ba1\u6570\u6587\u672c\u57df\u81ea\u8eab:focus\u9ad8\u4eae\u91cd\u53e0\u95ee\u9898demo<\/a><\/p>\n
\n
\u56e0\u6b64\uff0c\u6211\u4eec\u901a\u5e38\u505a\u6cd5\u5c31\u662f\uff1a\u8fb9\u6846\u4f7f\u7528\u7236\u7ea7<div><\/code>\u5143\u7d20\u6a21\u62df\uff0c\u6587\u672c\u57df\u5143\u7d20\u548c\u6280\u672f\u5143\u7d20\u4e0a\u4e0b\u4f9d\u6b21\u6392\u5217\uff08\u975e\u91cd\u53e0\uff09\uff0c\u6587\u672c\u57df\u539f\u672c\u7684\u8fb9\u6846\u53bb\u9664\u3002<\/p>\n
\u5047\u8bbeHTML\u5982\u4e0b\uff1a<\/p>\n
<div class=\"textarea-x\">\r\n    <textarea><\/textarea>\r\n    <label class=\"textarea-count\">0\/250<\/label>\r\n<\/div><\/pre>\n
\u5219\u6838\u5fc3CSS\u8fd9\u6837\uff1a<\/p>\n
\r\n\/* \u7236\u7ea7div\u5143\u7d20\u6a21\u62df\u8fb9\u6846 *\/<\/span>\r\n.textarea-x {\r\n    border: 1px solid #d0d0d5;\r\n    border-radius: 4px;\r\n    background-color: #fff;\r\n}\r\n\/* \u6587\u672c\u57df\u539f\u672c\u7684\u8fb9\u6846\u53bb\u9664 *\/<\/span>\r\n.textarea-x > textarea {\r\n    border: 0;\r\n    background: none;\r\n}<\/pre>\n
\u7136\u800c\u4e0a\u9762\u7684\u5b9e\u73b0\u6709\u4e2a\u975e\u5e38\u4e25\u91cd\u7684\u4e0d\u8db3\uff0c\u90a3\u5c31\u662f<textarea><\/code>\u5143\u7d20:focus<\/code>\u65f6\u5019\uff0c\u8fb9\u6846\u65e0\u6cd5\u9ad8\u4eae\uff0c\u56e0\u4e3aCSS\u4e2d\u6ca1\u6709\u7236\u9009\u62e9\u5668<\/a>\uff01<\/p>\n
\u56e0\u6b64\uff0c\u5b9e\u9645\u5f00\u53d1\u7684\u65f6\u5019\uff0c\u6211\u4eec\u4f1a\u4f7f\u7528\u76f8\u90bb\u5144\u5f1f\u9009\u62e9\u5668\uff0c\u4ee5\u53ca\u65b0\u5efa\u4e00\u4e2a\u5144\u5f1f\u5143\u7d20\u6765\u6a21\u62df\u8fb9\u6846\u3002<\/p>\n
HTML\u7ed3\u6784\u5982\u4e0b\uff1a<\/p>\n
<div class=\"textarea-x\">\r\n    <textarea><\/textarea>\r\n    <div class=\"textarea\"><\/div>\r\n    <label class=\"textarea-count\">0\/250<\/label>\r\n<\/div><\/pre>\n
\u539f\u7406\u5982\u4e0b\u56fe\u793a\u610f\uff1a<\/p>\n
\"\u65b0\u5efa\u4e00\u4e2adiv\u5143\u7d20\u6a21\u62df\u8fb9\u6846\"<\/p>\n
\u5bf9\u5e94\u7684\u6838\u5fc3CSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
.textarea-x {\r\n    position: relative;\r\n    z-index: 0;\r\n}\r\n.textarea-x > textarea {\r\n    border: 0;\r\n    background: none;\r\n    outline: 0;\r\n    resize: none;\r\n    position: relative;\r\n}\r\n.textarea-x > .textarea {\r\n    position: absolute;\r\n    border: 1px solid #d0d0d5;\r\n    border-radius: 4px;\r\n    background-color: #fff;\r\n    top: 0; bottom: 0; left: 0; right: 0;  \r\n    z-index: -1;\r\n}\r\n.textarea-x > :focus + .textarea {\r\n    border-color: #00a5e0;    \r\n}<\/pre>\n
\u7531\u4e8e.textarea<\/code>\u5143\u7d20\u548c\u539f\u751f\u7684<textarea><\/code>\u5143\u7d20\u662f\u76f8\u90bb\u5144\u5f1f\u5173\u7cfb\uff0c\u56e0\u6b64\u6211\u4eec\u53ef\u4ee5\u501f\u52a9\u76f8\u90bb\u5144\u5f1f\u9009\u62e9\u5668\uff0c\u8ba9<textarea><\/code>\u5143\u7d20focus\u65f6\u5019\u540e\u9762\u7528\u6765\u6a21\u62df\u8fb9\u6846\u7684.textarea<\/code>\u5143\u7d20\u9ad8\u4eae\u3002\u4e5f\u5c31\u662f\u8fd9\u4e48\u4e00\u6bb5CSS\u4ee3\u7801\uff1a<\/p>\n
.textarea-x > :focus + .textarea {\r\n    border-color: #00a5e0;    \r\n}<\/pre>\n
\u8fd9\u79cd\u5b9e\u73b0\u517c\u5bb9IE7+\u6d4f\u89c8\u5668\u3002\u4e0b\u56fe\u4e3a\u5b9e\u73b0\u540e\u7684\u6548\u679c\u622a\u56fe\uff1a<\/p>\n
\"\u76f8\u90bb\u5144\u5f1f\u5143\u7d20focus\u540e\u9ad8\u4eae\u6548\u679c\u622a\u56fe\"<\/p>\n
\u5f53\u7136\u6d89\u53ca\u5230\u5177\u4f53\u4ee3\u7801\uff0c\u8fd8\u662f\u6709\u5f88\u591a\u7ec6\u8282\u9700\u8981\u6ce8\u610f\u7684\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u5229\u7528\u76f8\u90bb\u5144\u5f1f\u9009\u62e9\u5668\u6a21\u62df\u5e26\u8ba1\u6570\u6587\u672c\u57df:focus\u6548\u679cdemo<\/a><\/p>\n
\n
\u4f46\u662f\uff0c\u73b0\u5728\u6709\u4e86CSS :focus-within<\/code>\u4f2a\u7c7b\u9009\u62e9\u5668\uff0c\u6211\u4eec\u7684\u4e8b\u60c5\u5c31\u7b80\u5355\u591a\u4e86\u3002<\/p>\n
\u8fd8\u662f\u5f00\u59cb\u63d0\u5230\u7684\u7236\u7ea7<div><\/code>\u5143\u7d20\u6a21\u62df\u7684\u505a\u6cd5\uff0c\u7136\u540e\uff0c\u914d\u5408\u8fd9\u4e48\u4e00\u53e5CSS\u5c31\u53ef\u4ee5\u4e86\uff1a<\/p>\n
.textarea-x:focus-within {\r\n    border-color: #00a5e0;    \r\n}<\/pre>\n
\u5c31\u662f\u8fd9\u4e48\u7b80\u5355\u3002<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a:focus-within\u4f2a\u7c7b\u4e0e\u5e26\u8ba1\u6570\u6587\u672c\u57df\u9ad8\u4eaedemo<\/a><\/p>\n
focus\u65f6\u5019\u6548\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\":focus-within\u7236\u7ea7\u8fb9\u6846\u9ad8\u4eae\u622a\u56fe\"<\/p>\n
\u4e09\u3001\u66f4\u591a\u601d\u8def\u3001\u66f4\u68d2\u6848\u4f8b\u548c\u7ed3\u675f\u8bed<\/h3>\n
:focus-within<\/code>\u4f2a\u7c7b\u539f\u672c\u8bbe\u8ba1\u7684\u4f5c\u7528\u662f\u539f\u751f\u8868\u5355\u5143\u7d20focus<\/code>\u65f6\u5019\uff0c\u7956\u5148<form><\/code>\u5143\u7d20\u53ef\u4ee5\u4e5f\u6709\u72b6\u6001\u53d8\u5316\u3002<\/p>\n
\u4f46\u662f\u5728\u6211\u770b\u6765\uff0c:focus-within<\/code>\u529f\u80fd\u4e4b\u5f3a\u608d\uff0c\u8fdc\u8fdc\u4e0d\u662f\u4ec5\u4ec5\u548c\u7956\u5148<form><\/code>\u5143\u7d20\u73a9\u8fc7\u5bb6\u5bb6\u8fd9\u4e48\u7b80\u5355\u3002<\/p>\n
\u7406\u8bba\u4e0a\uff0c\u53ea\u8981\u9875\u9762\u4e0a\u4efb\u610f\u4e00\u4e2a\u5143\u7d20focus<\/code>\uff0c\u901a\u8fc7:focus-within<\/code>\u5c31\u80fd\u5bf9\u9875\u9762\u4e0a\u4efb\u610f\u7684\u5143\u7d20\u8fdb\u884c\u6837\u5f0f\u63a7\u5236\u3002<\/p>\n
\u4f8b\u5982\uff1a<\/p>\n
html:focus-within xxx {\r\n    \/*xxx\u8dd1\u5f97\u4e86\u5417\uff1f\u8dd1\u4e0d\u4e86*\/<\/span>\r\n}<\/pre>\n
\u6211\u60f3\u5230\u7684\u6709\uff1a<\/p>\n
    \n
  1. \u76f8\u90bb\u9009\u62e9\u5668\uff0c\u52a0\u53f7\uff0c\u6216\u8005\u5f2f\u5f2f\u90fd\u53ea\u80fd\u9009\u62e9\u540e\u9762\u7684\u5143\u7d20\uff0c\u4f46\u662f\uff0c\u6709\u4e86:focus-within<\/code>\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u5bf9\u524d\u9762\u5143\u7d20\u8fdb\u884c\u63a7\u5236\uff0c\u867d\u7136\u53ea\u80fd\u5728:focus<\/code>\u884c\u4e3a\u573a\u666f\u4e0b\u3002\u4f8b\u5982\u8bf7\u91cd\u590d\u8f93\u5165\u5bc6\u7801\u65f6\u5019\uff0c\u8ba9\u4e0a\u9762\u7684\u8f93\u5165\u5bc6\u7801\u6846\u4e5f\u9ad8\u4eae\u3002<\/li>\n
  2. \u57fa\u4e8e\u7eafCSS\u548cfocus\u884c\u4e3a\u5b9e\u73b0\u4e0b\u62c9\u5217\u8868\u7684\u4ea4\u4e92\u6210\u4e3a\u4e86\u53ef\u80fd\u3002\u53ea\u8981\u628a\u6309\u94ae\u548c\u4e0b\u62c9\u5143\u7d20\u653e\u5728\u4e00\u4e2a\u5bb9\u5668\u4e2d\uff0c\u5c31\u53ef\u4ee5\u4e86\u3002\n
    \u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a:focus-within\u4f2a\u7c7b\u4e0e\u7eafCSS\u4e0b\u62c9\u5217\u8868demo<\/a><\/p>\n
    \u70b9\u51fb\u201c\u6211\u7684\u6d88\u606f\u201d\uff0c\u5c31\u4f1a\u51fa\u73b0\u4e0b\u62c9\u5217\u8868\uff1b\u6b64\u65f6\u70b9\u51fb\u4e0b\u62c9\u5217\u8868\u91cc\u9762\u7684\u6761\u76ee\uff0c\u4e0b\u62c9\u5143\u7d20\u4e5f\u4e00\u76f4\u663e\u793a\uff08\u56e0\u4e3a\u5217\u8868\u662f\u53effocus\u7684<a><\/code>\u5143\u7d20\uff09\u3002\u53ea\u6709\u70b9\u51fb\u9875\u9762\u7a7a\u767d\u5143\u7d20\u6216\u5176\u4ed6\u4f4d\u7f6e\uff0c\u4e0b\u62c9\u5217\u8868\u624d\u4f1a\u9690\u85cf\u3002\u5b8c\u5168\u7b26\u5408\u5b9e\u9645\u9879\u76ee\u5f00\u53d1\u7684\u4e0b\u62c9\u5217\u8868\u4ea4\u4e92\u9700\u6c42\u3002<\/p>\n
    \u4ea4\u4e92\u6548\u679c\u5982\u4e0bGIF\u622a\u5c4f\u6240\u793a\uff1a<\/p>\n
    \":focus-within\u4e0e\u7eafCSS\u5b9e\u73b0\u4e0b\u62c9\"<\/p>\n
    \u6838\u5fc3\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n
    <div class=\"details\">\r\n    <a href=\"javascript:\" class=\"summary\">\u6211\u7684\u6d88\u606f<\/a> \r\n    <div class=\"box\">\r\n        <a href=\"javascript:\">\u6211\u7684\u56de\u7b54<sup>12<\/sup><\/a>\r\n        <a href=\"javascript:\">\u6211\u7684\u79c1\u4fe1<\/a>\r\n        <a href=\"javascript:\">\u672a\u8bc4\u4ef7\u8ba2\u5355<sup>2<\/sup><\/a>\r\n        <a href=\"javascript:\">\u6211\u7684\u5173\u6ce8<\/a>\r\n    <\/div>\r\n<\/div><\/pre>\n
    .box {\r\n    display: none;\r\n}\r\n.details:focus-within .summary {\r\n    background-color: #fff;\r\n}\r\n.details:focus-within .box {\r\n    display: block;\r\n}<\/pre>\n<\/li>\n<\/ol>\n
    \u629b\u7816\u5f15\u7389\uff0c\u96c6\u601d\u5e7f\u76ca\u3002<\/p>\n
    \u8865\u5145\u4e8e2018-06-27<\/strong>
    \nIE Edge\u76ee\u524d\u6700\u65b0\u7248\u8fd8\u6ca1\u652f\u6301:focus-within<\/code>\uff0c\u800c\u4e14\uff0c\u6d4b\u8bd5\u8868\u660e\uff0c\u5f53IE\u652f\u6301\u9009\u62e9\u5668\u548c:focus-within<\/code>\u4e00\u8d77\u4f7f\u7528\u7684\u65f6\u5019\uff0c\u4f1a\u81ea\u52a8\u5ffd\u7565\u6574\u6761\u8bed\u53e5\uff0c\u4f8b\u5982\uff1a<\/p>\n
    \/* IE\u6d4f\u89c8\u5668\u5ffd\u7565\u6240\u6709\u4f2a\u7c7b\uff0cCSS\u8bed\u53e5\u65e0\u6548 *\/<\/span>\r\n.example:hover,\r\n.example:active,\r\n.example:focus-within {\r\n    color: red;\r\n}<\/pre>\n
    \u9700\u8981\u8fd9\u6837\u4e66\u5199\uff1a<\/p>\n
    \/* IE\u6d4f\u89c8\u5668\u53ef\u8bc6\u522b *\/<\/span>\r\n.example:hover,\r\n.example:active {\r\n    color: red;\r\n}\r\n\/* IE\u4e0d\u53ef\u8bc6\u522b *\/<\/span>\r\n.example:focus-within {\r\n    color: red;\r\n}<\/pre>\n
    \u8fd9\u6837\u73b0\u8c61\u4e5f\u4f1a\u6211\u4eec\u533a\u5206IE\u6d4f\u89c8\u5668\u548cChrome\/Firefox\u63d0\u4f9b\u4e86\u601d\u8def\uff0c\u4f8b\u5982\uff0c\u6211\u4eec\u5e0c\u671b\u67d0\u4e00\u4e2a\u5143\u7d20IE\u6d4f\u89c8\u5668\u4e0b\u662f\u7ea2\u8272\uff0c\u5176\u4ed6\u6d4f\u89c8\u5668\u4e0b\u662f\u84dd\u8272\uff0c\u53ef\u4ee5\u8fd9\u6837\uff1a<\/p>\n
    .browser {\r\n    color: red;\r\n}\r\n.browser,\r\n.xxxx:focus-within {\r\n    color: blue;\r\n}<\/pre>\n
    \u8865\u5145\u4e8e2019-06-26<\/strong><\/p>\n
    caniuse\u4e0a\u663e\u793aSafari\u6d4f\u89c8\u5668\u662f\u652f\u6301:focus-within<\/code>\u4f2a\u7c7b\u7684\uff0c\u4f46\u662f\u6211\u7684demo\u6d4b\u8bd5\u53d1\u73b0\u5374\u6ca1\u6709\u6548\u679c\uff0c\u600e\u4e48\u56de\u4e8b\uff1f\u540e\u6765\u4e00\u756a\u7814\u7a76\u77e5\u9053\u4e86\u539f\u56e0\uff0c\u539f\u6765\u5728Safari\u6d4f\u89c8\u5668\u4e0b\uff0c<a><\/code>\u5143\u7d20\u5c45\u7136\u4e0d\u80fd\u88abTab focus\u3002\u600e\u4e48\u529e\u5462\uff0c\u5f88\u7b80\u5355\uff0c\u7ed9<a><\/code>\u5143\u7d20\u8bbe\u7f6etabindex=\"0\"<\/code>\u5c31\u53ef\u4ee5\u4e86\u3002\u751f\u6548\u539f\u56e0\u53ef\u53c2\u89c1\u8fd9\u7bc7\u6587\u7ae0\uff1a\u201cHTML tabindex\u5c5e\u6027\u4e0eweb\u7f51\u9875\u952e\u76d8\u65e0\u969c\u788d\u8bbf\u95ee<\/a>\u201d\u3002<\/p>\n
    \n
    \u611f\u8c22\u9605\u8bfb\uff0c\u6b22\u8fce\u4ea4\u6d41\uff01<\/p>\n
    <\/p>\n
    \u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u4f1a\u7ecf\u5e38\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\u53ca\u4fee\u6b63\u4e00\u4e9b\u9519\u8bef\uff0c\u56e0\u6b64\u8f6c\u8f7d\u8bf7\u4fdd\u7559\u539f\u51fa\u5904\uff0c\u65b9\u4fbf\u6eaf\u6e90\uff0c\u907f\u514d\u9648\u65e7\u9519\u8bef\u77e5\u8bc6\u7684\u8bef\u5bfc\uff0c\u540c\u65f6\u6709\u66f4\u597d\u7684\u9605\u8bfb\u4f53\u9a8c\u3002
    \n\u672c\u6587\u5730\u5740\uff1a    https:\/\/www.zhangxinxu.com\/wordpress\/?p=7327<\/a><\/p>\n
    \uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
    :focus-within<\/code>\u4f2a\u7c7b\u539f\u672c\u8bbe\u8ba1\u7684\u4f5c\u7528\u662f\u539f\u751f\u8868\u5355\u5143\u7d20focus<\/code>\u65f6\u5019\uff0c\u7956\u5148<form><\/code>\u5143\u7d20\u53ef\u4ee5\u4e5f\u6709\u72b6\u6001\u53d8\u5316\u3002<\/p>\n
    \u4f46\u662f\u5728\u6211\u770b\u6765\uff0c:focus-within<\/code>\u529f\u80fd\u4e4b\u5f3a\u608d\uff0c\u8fdc\u8fdc\u4e0d\u662f\u4ec5\u4ec5\u548c\u7956\u5148<form><\/code>\u5143\u7d20\u73a9\u8fc7\u5bb6\u5bb6\u8fd9\u4e48\u7b80\u5355\u3002<\/p>\n
    \u7406\u8bba\u4e0a\uff0c\u53ea\u8981\u9875\u9762\u4e0a\u4efb\u610f\u4e00\u4e2a\u5143\u7d20focus<\/code>\uff0c\u901a\u8fc7:focus-within<\/code>\u5c31\u80fd\u5bf9\u9875\u9762\u4e0a\u4efb\u610f\u7684\u5143\u7d20\u8fdb\u884c\u6837\u5f0f\u63a7\u5236…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1209,177,295,535,269,843,826,409,1074,709,212],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/7327"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=7327"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/7327\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=7327"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=7327"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=7327"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}