{"id":5559,"date":"2016-08-07T16:26:46","date_gmt":"2016-08-07T08:26:46","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=5559"},"modified":"2022-07-21T14:27:09","modified_gmt":"2022-07-21T06:27:09","slug":"css-parent-selector","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2016\/08\/css-parent-selector\/","title":{"rendered":"\u5982\u4f55\u5728CSS\u4e2d\u5b9e\u73b0\u7236\u9009\u62e9\u5668\u6548\u679c\uff1f"},"content":{"rendered":"<p>by <a href=\"http:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=5559\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=5559<\/a><br \/>\n\u672c\u6587\u5168\u6587\u8f6c\u8f7d\u9700\u8d2d\u4e70\u7248\u6743(500\u00a5)\uff0c\u6458\u8981\u5f15\u6d41\u5219\u514d\u8d39\uff0c\u5177\u4f53<a href=\"http:\/\/www.zhangxinxu.com\/sp\/copyright.html\" 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href=\"http:\/\/www.zhangxinxu.com\/study\/201608\/input-focus-parent-highlight.html\" target=\"_blank\">\u5b50\u5143\u7d20focus\uff0c\u5bb9\u5668\u8fb9\u6846\u9ad8\u4eaedemo<\/a><\/p>\n<p>\u4e0b\u56fe\u4e3a\u9ed8\u8ba4\u6001\u6548\u679c\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201608\/2016-08-07_145425.png\" width=\"580\" height=\"224\" alt=\"\u9ed8\u8ba4\u6001\" class=\"alignnone\" 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src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201608\/2016-08-07_145840.png\" width=\"570\" height=\"215\" alt=\"\u8f93\u5165\u6846\u4f4d\u7f6e\" class=\"alignnone\" \/><\/p>\n<p>\u957f\u5ea6\u4e0d\u4f1a\u5f88\u957f\uff0c\u56e0\u4e3a\u5bb9\u6613\u6362\u5230\u4e0b\u4e00\u884c\u3002\u597d\u4e86\uff0c\u73b0\u5728\u9700\u6c42\u6765\u4e86\uff0c\u4ea4\u4e92\u8bbe\u8ba1\u5e08\u5e0c\u671b\u7528\u6237focus\u8fd9\u4e2a\u5c0f\u5c0f\u8f93\u5165\u6846\u7684\u65f6\u5019\uff0c\u5916\u9762\u5bb9\u5668\u7684\u7070\u8272\u8fb9\u6846\u8981\u9ad8\u4eae\uff0c\u5c31\u50cf\u4e0b\u9762\u8fd9\u6837\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201608\/2016-08-07_150159.png\" width=\"576\" height=\"222\" alt=\"focus\u8f93\u5165\u6846\uff0c\u7236\u7ea7\u5143\u7d20\u9ad8\u4eae\" class=\"alignnone\" 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$(this).parent().addClass('highlight');\r\n});<\/pre>\n<\/div>\n<p>\u56e0\u4e3a\u6ca1\u529e\u6cd5\u5440\uff0c\u6ca1\u6709\u6d4f\u89c8\u5668\u652f\u6301\u7236\u9009\u62e9\u5668\uff01<\/p>\n<p>\u6b64\u65f6\uff0c\u5e7f\u5927CSSer\u7684\u5fc3\u4e2d\u4e00\u5b9a\u5728\u5450\u558a\uff0c\u5982\u679c\u5929\u964d\u4e00\u4e2a\u7236\u9009\u62e9\u5668\u8be5\u591a\u597d\u554a\uff01\u8fd9\u5c31\u662f\u4e3a\u4f55\u7236\u9009\u62e9\u5668\u547c\u58f0\u5f88\u9ad8\u7684\u539f\u56e0\u4e4b\u4e00\uff0c\u56e0\u4e3a\u786e\u5b9e\u6709\u5e7f\u6cdb\u7684\u5e94\u7528\u573a\u666f\u3002<\/p>\n<p>\u597d\u4e86\uff0c\u56de\u5230\u73b0\u5b9e\uff0c\u6d4f\u89c8\u5668\u652f\u6301\u7236\u9009\u62e9\u5668\u9065\u9065\u65e0\u671f\uff01<\/p>\n<p>\u662f\u56fa\u6267\u5730\u5e0c\u671b\u7528\u7eafCSS\u5b9e\u73b0\u8fd8\u662f\u59a5\u534fJS\u5b9e\u73b0\uff1fOK\uff0c\u544a\u8bc9\u5927\u5bb6\uff0c\u7eafCSS\u662f\u53ef\u4ee5\u5b9e\u73b0\u7684\uff0c\u800c\u4e14\u5c31\u662f\u4e00\u4e9b\u7b80\u5355\u7684CSS\u7279\u6027\u7ec4\u5408\u800c\u6210\u5b9e\u73b0\u7684\uff0c\u6ca1\u6709\u4ec0\u4e48\u9ad8\u6df1\u96be\u61c2\u7684\u5730\u65b9\uff0c\u800c\u4e14\u517c\u5bb9\u6027\u51fa\u5947\u7684\u597d\uff0cIE7+\u6d4f\u89c8\u5668\u90fd\u652f\u6301\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u4e0b\u56fe\u8fd9\u4e2a\u6548\u679c\u5c31\u662f\u7eafCSS\u5b9e\u73b0\u7684\uff0c\u901a\u7528DOM\u7ed3\u6784\u8bbe\u8ba1\u548c\u5176\u4ed6\u9009\u62e9\u5668\u5b9e\u73b0\u7684\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201608\/2016-08-07_150159.png\" width=\"576\" height=\"222\" alt=\"focus\u8f93\u5165\u6846\uff0c\u7236\u7ea7\u5143\u7d20\u9ad8\u4eae\" class=\"alignnone\" \/><\/p>\n<p>\u90a3\u5177\u4f53\u539f\u7406\u662f\u600e\u6837\u7684\u5462\uff1f<\/p>\n<p>\u5927\u81f4\u5206\u4e3a\u4e0b\u97623\u6b65\uff1a<\/p>\n<ol>\n<li>\u539f\u5148\u7684\u7236\u7ea7\u5bb9\u5668\u53ea\u5904\u7406\u7ed3\u6784\uff0c\u4e0d\u8d1f\u8d23\u5916\u89c2\u3002CSS\u4ee3\u7801\u5982\u4e0b\uff1a\n<div class=\"zxx_code\">\n<pre>.container {\r\n    min-height: 120px;\r\n    position: relative; z-index: 1;\r\n}<\/pre>\n<\/div>\n<p>\u5176\u4e2d\uff0c\u8fd9\u91cc\u7684<code>z-index:1<\/code>\u7528\u6765\u521b\u5efa\u65b0\u7684\u5c42\u53e0\u4e0a\u4e0b\u6587\uff0c\u8fd9\u6837\u5b50\u5143\u7d20\u7684<code>z-index:-1<\/code>\u4e0d\u4f1a\u8d85\u51fa\u5bb9\u5668\uff0c\u5177\u4f53\u53ef\u53c2\u89c1\u201c<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=5115\">\u6df1\u5165\u7406\u89e3CSS\u4e2d\u7684\u5c42\u53e0\u4e0a\u4e0b\u6587\u548c\u5c42\u53e0\u987a\u5e8f<\/a>\u201d\u4e00\u6587\u3002<\/li>\n<li>\u65b0\u5efa\u4e00\u4e2a\u5143\u7d20\u8d1f\u8d23\u5bb9\u5668\u7684\u5916\u89c2\uff0c\u653e\u7f6e\u5728\u8f93\u5165\u6846\u7684\u540e\u9762\uff0c\u4f7f\u7528absolute\u62c9\u4f38\u548c\u5bb9\u5668\u5c3a\u5bf8\u4e00\u81f4\u3002\u4e8e\u662fHTML\u7ed3\u6784\u53d8\u6210\u8fd9\u6837\uff1a\n<div class=\"zxx_code\">\n<pre>&lt;div class=\"container\"&gt;\r\n    &lt;input id=\"input\" class=\"input\"&gt;\r\n    <span style=\"color:green;\">&lt;!-- \u4e0b\u9762\u7684label\u5c31\u662f\u65b0\u5efa\u7684\u8d1f\u8d23\u5bb9\u5668\u5916\u89c2\u7684\u5143\u7d20 --&gt;<\/span>\r\n    &lt;label class=\"border\" for=\"input\"&gt;&lt;\/label&gt;\r\n&lt;\/div&gt;<\/pre>\n<\/div>\n<p>CSS\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<div class=\"zxx_code\">\n<pre>.border {\r\n    <span style=\"color:green;\">\/* \u5c3a\u5bf8\u81ea\u9002\u5e94\u5bb9\u5668\u5927\u5c0f\uff0c\u5047\u88c5\u662f\u5bb9\u5668 *\/<\/span>\r\n    position: absolute; left: 0; right: 0; top: 0; bottom: 0; \r\n    <span style=\"color:green;\">\/* \u5728\u8f93\u5165\u6846\u7684\u4e0b\u9762 *\/<\/span>\r\n    z-index: -1;\r\n    <span style=\"color:green;\">\/* \u5916\u89c2\u6a21\u62df *\/<\/span>\r\n    border: 1px solid #bbb;\r\n}<\/pre>\n<\/div>\n<p>\u7edd\u5bf9\u5b9a\u4f4d\u5143\u7d20\uff0c\u5982\u679c\u6ca1\u6709\u5177\u4f53\u7684<code>width<\/code>\/<code>height<\/code>\u9650\u5b9a\uff0cleft\/right\u4ee5\u53catop\/bottom\u5bf9\u7acb\u65b9\u4f4d\u7684\u6570\u503c\u4f1a\u62c9\u4f38\u5143\u7d20\u7684\u5c3a\u5bf8\u3002\u8fd9\u91cc\u8fd9\u91cc\uff0c\u5168\u90e8\u90fd\u8bbe\u4e3a<code>0<\/code>\uff0c\u548c<code>.container<\/code>\u6240\u5728\u5143\u7d20\u7ec4\u5408\uff0c\u5c31\u5f62\u6210\u4e86\u7c7b\u4f3c\u5bbd\u9ad8100%\u540c\u65f6<code>box-sizing:border-box;<\/code>\u7684\u6548\u679c\uff0c\u6240\u4ee5\uff0c\u5982\u679c\u4f60\u60f3\u8ba9IE7\u6d4f\u89c8\u5668\u5b9e\u73b0\u7c7b\u4f3c<code>border-box<\/code>\u7684\u76d2\u5c3a\u5bf8\u8ba1\u7b97\uff0c\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u5c31\u53ef\u4ee5\u4f7f\u7528\u7edd\u5bf9\u5b9a\u4f4d\u62c9\u4f38\uff0c\u522b\u8bf4\u6211\u6ca1\u544a\u8bc9\u4f60\u54e6\uff01\n<\/li>\n<li>\u901a\u8fc7\u76f8\u90bb\u5144\u5f1f\u9009\u62e9\u5668\uff0c\u63a7\u5236\u5bb9\u5668\u7684\u6837\u5f0f\u53d8\u5316\uff0cCSS\u4ee3\u7801\u5982\u4e0b\uff1a\n<div class=\"zxx_code\">\n<pre>.input:focus + .border {\r\n    <span style=\"color:green;\">\/* \u5bb9\u5668\u8fb9\u6846\u989c\u8272\u9ad8\u4eae *\/<\/span>\r\n    border-color: #1271E0;    \r\n}<\/pre>\n<\/div>\n<\/li>\n<\/ol>\n<p>\u4e8e\u662f\u4e4e\uff0c\u5f53\u6211\u4eecfocus\u8f93\u5165\u6846\u7684\u65f6\u5019\uff0c\u90a3\u4e2a\u5927\u5927\u7684\u7070\u8272\u8fb9\u6846\u5c31\u9ad8\u4eae\u4e86\uff01\u770b\u4e0a\u53bb\u9ad8\u4eae\u7684\u662f\u5916\u90e8\u7684\u5bb9\u5668\uff0c\u5b9e\u9645\u4e0a\u662f\u8f93\u5165\u6846\u7684\u5144\u5f1f\u5143\u7d20\uff0c\u8fd9\u5c31\u662f\u4e0a\u9762\u6240\u8bf4\u7684\u201c<strong>\u628a\u5144\u5f1f\u5143\u7d20\u4f5c\u4e3a\u7956\u5148\u5143\u7d20\u4f7f\u7528<\/strong>\u201d\uff01<\/p>\n<p><strong>\u5c0f\u7ed3<\/strong><br \/>\n\u6839\u636e\u6211\u7684\u5b9e\u9645\u5f00\u53d1\u7ecf\u9a8c\uff0c\u57fa\u672c\u4e0a\uff0c\u6240\u4ee5\u9700\u8981\u4f7f\u7528\u7236\u9009\u62e9\u5668\u63a7\u5236\u6837\u5f0f\u7684\u5730\u65b9\uff0c\u90fd\u53ef\u4ee5\u4f7f\u7528\u8fd9\u79cd\u7b56\u7565\u5b9e\u73b0\u3002\u672c\u6587\u7684\u4f8b\u5b50\u5c31\u5168\u5f53\u662f\u629b\u7816\u5f15\u7389\uff0c\u5f53\u5728\u5ea7\u7684\u8bf8\u4f4d\u4ee5\u540e\u9047\u5230\u7c7b\u4f3c\u9700\u6c42\u7684\u65f6\u5019\uff0c\u5e0c\u671b\u53ef\u4ee5\u60f3\u8d77\u8fd9\u7bc7\u6587\u7ae0\uff0c\u8bf4\u4e0d\u5b9a\u4f1a\u5bf9\u4f60\u7684\u5b9e\u73b0\u5e26\u6765\u5168\u65b0\u7684\u601d\u8def\u3002<\/p>\n<p><img decoding=\"async\" src=\"http:\/\/mat1.gtimg.com\/www\/mb\/images\/face\/14.gif\" align=\"absmiddle\"><\/p>\n<p><strong>\u66f4\u65b0\u4e8e2022\u5e747\u670821\u65e5<\/strong><\/p>\n<p>\u73b0\u5728\uff0c\u5728\u73b0\u4ee3\u6d4f\u89c8\u5668\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528 :focus-within \u4f2a\u7c7b\u66f4\u65b9\u4fbf\u7684\u5b9e\u73b0\u7c7b\u4f3c\u7236\u9009\u62e9\u5668\u7684\u6548\u679c\uff0c\u8be6\u89c1\u8fd9\u7bc7\u6587\u7ae0\uff1a\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/01\/css-focus-within-pseudo-class-selector\/\">\u8be6\u7ec6\u4e86\u89e3CSS :focus-within\u4f2a\u7c7b\u53ca\u5176\u4ea4\u4e92\u5e94\u7528<\/a>\u201d\u3002<\/p>\n<p>\u7c7b\u4f3c\u7684\u9009\u62e9\u5668\u8fd8\u6709 <code>:target-within<\/code> \u4f2a\u7c7b\uff0c\u4e0d\u8fc7\u517c\u5bb9\u6027\u8fd8\u4e0d\u662f\u5f88\u597d\u3002<\/p>\n<h3>\u4e09\u3001\u5173\u4e8e\u7236\u9009\u62e9\u5668\u7684\u4e00\u4e9b\u516b\u5366\u77e5\u8bc6<\/h3>\n<p>\u6b64\u5904\u516b\u5366\u77e5\u8bc6\u91c7\u64b7\u81ea\u77e5\u4e4e\u201c<a href=\"https:\/\/www.zhihu.com\/question\/20443379\" target=\"_blank\">CSS \u4e2d\u80fd\u5426\u9009\u53d6\u7236\u5143\u7d20\uff1f<\/a>\u201d\u8fd9\u4e2a\u95ee\u9898\u4e00\u4e1d\u7684\u56de\u7b54\u3002<\/p>\n<p>\u603b\u7ed3\u4e00\u4e0b\u5c31\u662f2\u4e2a\u69fd\u70b9\uff1a<\/p>\n<ol>\n<li>\n<p>CSS4\u4e2d\u7236\u9009\u62e9\u5668\u7684\u8bed\u6cd5<strong>\u53d8\u8eab\u4e863\u6b21<\/strong>\uff1a<\/p>\n<ul>\n<li>2011\u5e74\uff0c\u8bed\u6cd5\u662f<code>$E > F<\/code>\uff0c\u4f8b\u5982\uff1a\n<div class=\"zxx_code\">\n<pre>$input:focus > .container {}<\/pre>\n<\/div>\n<p>\u8fd9\u79cd\u8bed\u6cd5\u662f\u7f51\u7edc\u4e0a\u6d41\u4f20\u6700\u591a\u7684\u7528\u6cd5\uff0c\u5b9e\u9645\u4e0a\uff0c\u65e9\u5c31\u6dd8\u6c70\u5f88\u4e45\u4e86\uff0c\u5927\u5bb6\u8981\u660e\u9274\u554a\uff01<\/li>\n<li>2012-2013\u5e74\u7684\u8bed\u6cd5\u662f<code>!E > F<\/code>\uff0c\u4f8b\u5982\uff1a\n<div class=\"zxx_code\">\n<pre>!input:focus > .container {}<\/pre>\n<\/div>\n<p>\u6619\u82b1\u4e00\u73b0\u3002<\/li>\n<li>2014\u5e74\uff0c\u8bed\u6cd5\u4f7f\u7528:has()\u4f2a\u7c7b(Relational Pseudo-class)\uff0c\u4f8b\u5982\uff1a\n<div class=\"zxx_code\">\n<pre>.container:has(> input:focus) {}<\/pre>\n<\/div>\n<\/li>\n<\/ul>\n<\/li>\n<li>\n<p>\u6700\u540e\u4e00\u6b21\u7684\u53d8\u8eab<code>:has<\/code><strong>\u63a8\u8fdf\u5230CSS5<\/strong>\u4e86\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u6069\uff0c\u5927\u5bb6\u8fd9\u4e0b\u90fd\u660e\u767d\u4e86\u5427\uff01<\/p>\n<p>\u54c8\uff1f\u660e\u767d\u4ec0\u4e48\uff1f\u8fd9\u8fd8\u8981\u95ee\u5417\uff0c\u90a3\u5c31\u662f\u81f3\u5c1110\u5e74\u4e4b\u5185\u4e0d\u4f1a\u51fa\u73b0CSS\u7236\u9009\u62e9\u5668\u4e86\u5440\uff01\u8fd8CSS5\u5462\uff0c\u4e5f\u4e0d\u770b\u770bCSS4\u8fd9\u4f1a\u513f\u624d\u521a\u521a\u5f00\u59cb\u957f\u6bdb\u5462\uff01<\/p>\n<p>\u6240\u4ee5\u5927\u5bb6\u8fd8\u662f\u9192\u9192\uff0c\u5b66\u5b66\u672c\u6587\u63d0\u4f9b\u7684\u5b9e\u73b0\u601d\u8def\u5427\uff01<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201608\/xingxing-s.gif\" width=\"100\" height=\"100\" alt=\"\u9192\u9192\" class=\"alignnone\" \/><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u5c0a\u91cd\u8f9b\u52e4\u52b3\u52a8\uff0c\u53ef\u4ee5\u514d\u8d39\u6458\u8981\u3001\u63a8\u8350\u6216\u805a\u5408\uff0c\u4f46\u5b8c\u6574\u8f6c\u8f7d\u9700\u4ed8\u8d39\u8d2d\u4e70\u7248\u6743\uff0c\u8be6\u89c1<a href=\"http:\/\/www.zhangxinxu.com\/sp\/copyright.html\" target=\"_blank\">\u8f6c\u8f7d\u534f\u8bae\u58f0\u660e<\/a><br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=5559\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=5559<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u867d\u7136\u8bf4\u81f3\u4eca\u5c1a\u65e0\u6d4f\u89c8\u5668\u652f\u6301\u539f\u751f\u7684\u7236\u9009\u62e9\u5668\u6548\u679c\uff0c\u4f46\u662f\uff0c\u6211\u4eec\u662f\u53ef\u4ee5\u901a\u8fc7\u5176\u4ed6\u624b\u6bb5\u6765\u5b9e\u73b0\u7236\u9009\u62e9\u5668\u6548\u679c\u7684\uff0c\u867d\u8bf4\u4e0d\u662f100%\u5b8c\u5168\uff0c\u4f46\u662f\uff0c\u4e00\u822c\u7684\u9879\u76ee\u9700\u6c42\u90fd\u662f\u53ef\u4ee5\u6ee1\u8db3\u7684\uff0c\u5982\u4f55\u5b9e\u73b0\u5462\uff1f\u5982\u679c\u7528\u4e00\u53e5\u8bdd\u89e3\u91ca\u539f\u7406\u5c31\u662f\u201c\u628a\u5144\u5f1f\u5143\u7d20\u4f5c\u4e3a\u7956\u5148\u5143\u7d20\u4f7f\u7528\u201d\u2026\u2026<\/p>\n<p>\u672c\u6587\u5176\u4ed6\u5730\u65b9\u662f\u770b\u4e0d\u5230\u7684\u54df~~<\/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":[843,826,1074,212],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/5559"}],"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=5559"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/5559\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=5559"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=5559"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=5559"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}