{"id":6102,"date":"2017-04-23T22:22:14","date_gmt":"2017-04-23T14:22:14","guid":{"rendered":"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6102"},"modified":"2017-04-23T22:42:09","modified_gmt":"2017-04-23T14:42:09","slug":"css-focus-js-improve-accessibility-keyboard","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2017\/04\/css-focus-js-improve-accessibility-keyboard\/","title":{"rendered":"CSS :focus\u4f2a\u7c7bJS focus\u4e8b\u4ef6\u63d0\u9ad8\u7f51\u7ad9\u952e\u76d8\u53ef\u8bbf\u95ee\u6027"},"content":{"rendered":"<p>by <a href=\"http:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"http:\/\/www.zhangxinxu.com\/wordpress\/?p=6102\">http:\/\/www.zhangxinxu.com\/wordpress\/?p=6102<\/a><br 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{\n  outline: 0 none;\n}<\/pre>\n<pre>a {\n  outline: 0 none;\n}<\/pre>\n<p>\u5728\u5168\u5c40\u53bb\u9664\u5143\u7d20\u7684<code>outline<\/code>\uff0c\u4f1a\u5bfc\u81f4\u63a7\u4ef6\u5143\u7d20\u88ab<code>focus<\/code>\u65f6\u5019UI\u5b8c\u5168\u6ca1\u6709\u4efb\u4f55\u6539\u53d8\uff0c\u7528\u6237\u6839\u672c\u5c31\u65e0\u6cd5\u77e5\u9053\u73b0\u5728\u5230\u5e95\u54ea\u4e2a\u5143\u7d20\u662f\u5904\u4e8e<code>focus<\/code>\u72b6\u6001\uff0c\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u51e0\u4e4e\u5c31\u662f<code>0<\/code>\uff0c\u5728\u6211\u770b\u770b\u662f\u975e\u5e38\u4e0d\u4e13\u4e1a\u7684\u505a\u6cd5\u3002<\/p>\n<p>\u5176\u5b9e\u6211\u4eec\u53ea\u8981\u5e73\u65f6\u6ce8\u610fHTML\u8bed\u4e49\u5316\uff0c\u4f8b\u5982\u6309\u94ae\u4e0d\u8981\u4f7f\u7528<code>&lt;span&gt;<\/code>\uff0c<code>&lt;div&gt;<\/code>\u7b49\u6807\u7b7e\uff0c\u4e0d\u8981\u91cd\u7f6e<code>outline<\/code>\uff0c\u57fa\u672c\u4e0a\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u5c31\u5df2\u7ecf\u53ca\u683c\u4e86\u3002<\/p>\n<p>\u82e5\u60f3\u518d\u8fdb\u4e00\u6b65\uff0c\u4f8b\u5982\u4e00\u4e9b\u4ea4\u4e92\u6548\u679c\u4e5f\u80fd\u952e\u76d8\u8bbf\u95ee\uff0c\u5219\u9700\u8981\u505a\u4e00\u4e9b\u5176\u4ed6\u7684\u989d\u5916\u5de5\u4f5c\u4e86\uff0c\u4e00\u822c\u662f\u4f7f\u7528CSS :focus\u4f2a\u7c7b\u6216\u8005JS focus\u4e8b\u4ef6\u63d0\u9ad8\u7f51\u7ad9\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u3002<\/p>\n<p>\u6211\u4e0b\u9762\u4e3e\u51e0\u4e2a\u5178\u578b\u573a\u666f\u6848\u4f8b\uff0c\u5e0c\u671b\u53ef\u4ee5\u5bf9\u5927\u5bb6\u65e5\u5e38\u5de5\u4f5c\u6709\u6240\u542f\u53d1\u3002<\/p>\n<h3>\u4e8c\u3001label\u6807\u7b7e\u548c\u8868\u5355\u5143\u7d20\u4e4b\u95f4\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027<\/h3>\n<p>\u5bf9\u4e8e<code>&lt;form&gt;<\/code>\u8868\u5355\u5143\u7d20\uff0c\u5982\u679c\u91cc\u9762\u6709<code>type<\/code>\u4e3a<code>submit<\/code>\u7c7b\u578b\u7684\u6309\u94ae\uff0c\u5219\u6d4f\u89c8\u5668\u5929\u7136\u652f\u6301\u5355\u884c\u8f93\u5165\u6846\u7684\u56de\u8f66\u63d0\u4ea4\u884c\u4e3a\u3002\u5982\u679c\u6211\u4eec\u7684\u8f93\u5165\u6846\u4e0d\u8d70<code>&lt;form&gt;<\/code>\u5143\u7d20\uff0c\u4e5f\u6ca1\u6709\u539f\u751f\u7684\u63d0\u4ea4\u6309\u94ae\uff0c\u5219Enter\u56de\u8f66\u662f\u4e0d\u4f1a\u89e6\u53d1\u4efb\u4f55\u9ed8\u8ba4\u884c\u4e3a\u7684\uff0c\u6b64\u65f6\u8981\u60f3\u56de\u8f66\u6267\u884c\u67d0\u4e8b\u4ef6\uff0c\u6211\u4eec\u5c31\u9700\u8981\u76d1\u542c\u952e\u76d8\u4e8b\u4ef6\uff0c\u663e\u7136\u5f00\u53d1\u548c\u7ef4\u62a4\u6210\u672c\u5c31\u4e0a\u53bb\u4e86\uff0c\u6548\u679c\u8fd8\u6ca1\u6709\u539f\u751f\u7684\u597d\uff0c\u5b8c\u5168\u5c31\u662f\u5403\u529b\u4e0d\u8ba8\u597d\u7684\u4e8b\u60c5\uff0c\u8bf7\u907f\u514d\u4e4b\u3002<\/p>\n<p>\u7136\u800c\u539f\u751f\u7684\u6309\u94ae\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u90a3\u5c31\u662fUI\u6837\u5f0f\u63a7\u5236\u5b58\u5728\u517c\u5bb9\u6027\u5dee\u5f02\uff0c\u5c24\u5176\u662f\u684c\u9762\u7aef\u7f51\u9875\u9879\u76ee\u3002<\/p>\n<p>\u4f46\u662f\uff0c\u6211\u4eec\u53ef\u4ee5\u501f\u52a9<code>&lt;label&gt;<\/code>\u5143\u7d20\u5b9e\u73b0\u6309\u94ae\u6837\u5f0f\u7684\u79fb\u82b1\u63a5\u6728\uff0c\u5982\u4e0bHTML\u548cCSS\uff1a<\/p>\n<pre>&lt;input id=\"t\" type=\"submit\"&gt;\n&lt;label class=\"btn\" for=\"t\"&gt;\u63d0\u4ea4&lt;\/label&gt;<\/pre>\n<p>\u539f\u59cb\u6309\u94ae\u4e0d\u53ef\u89c1\uff0c<code>&lt;label&gt;<\/code>\u5143\u7d20\u53d8\u8eab\u6309\u94ae\uff1a<\/p>\n<pre>[type=\"submit\"] {\n    position: absolute;\n    clip: rect(0 0 0 0);\n}\n.btn {\n    display: inline-block;\n    padding: 2px 12px;\n    background-color: #cd0000;\n    color: #fff;\n    font-size: 14px;\n    cursor: pointer;\n}<\/pre>\n<p>\u4e8e\u662f\uff0c\u6211\u4eec\u7684\u6309\u94ae\u7f8e\u7f8e\u7684\uff0c\u540c\u65f6\u56de\u8f66\u4e8b\u4ef6\u4ec0\u4e48\u7684\u4e5f\u5929\u7136\u652f\u6301\uff0c\u70b9\u51fb\u6309\u94ae\u4e5f\u4f1a\u5929\u7136\u63d0\u4ea4\u8868\u5355\u3002<\/p>\n<p>\u4f46\u8fd8\u4e0d\u5b8c\u7f8e\uff0c\u5f53\u6211\u4eec\u4f7f\u7528Tab\u952e\u5728\u9875\u9762\u4e0a\u904d\u5386\u5143\u7d20\u7684\u65f6\u5019\uff0c<code>focus<\/code>\u7684\u662f\u9690\u85cf\u7684\u539f\u751f\u63d0\u4ea4\u6309\u94ae\uff0c\u800c\u201c\u4ee3\u8a00\u4eba\u201d<code>&lt;label&gt;<\/code>\u5143\u7d20\u65e0\u6cd5\u88ab<code>focus<\/code>\uff0c\u8fd9\u5c31\u4f1a\u5bfc\u81f4\u8fd9\u4e48\u4e00\u4e2a\u73b0\u8c61\uff1a\u7528\u6237\u904d\u5386\u9875\u9762\u63a7\u4ef6\u5143\u7d20\uff0c\u4e00\u76f4\u90fd\u5f88\u987a\u5229\uff0c\u7a81\u7136\u8981\u5230\u63d0\u4ea4\u6309\u94ae\u7684\u65f6\u5019\uff0c\u9875\u9762\u4f1a\u7a81\u7136\u5982\u6b7b\u6c34\u4e00\u822c\uff0c\u6ca1\u6709\u4efb\u4f55\u5143\u7d20\u6709<code>outline<\/code>\u9ad8\u4eae\u3002\u539f\u56e0\u5c31\u662f\u88ab<code>focus<\/code>\u7684\u6309\u94ae\u5143\u7d20\u5904\u4e8e\u9690\u85cf\u72b6\u6001\uff0c\u7528\u6237\u65e0\u6cd5\u770b\u5230<code>outline<\/code>\u6548\u679c\uff0c\u6b64\u65f6\u6211\u4eec\u5c31\u9700\u8981\u989d\u5916\u589e\u52a0\u4e00\u5c42CSS\u4ee3\u7801\uff0c\u8ba9<code>&lt;label&gt;<\/code>\u8fd9\u4e2a\u201c\u4ee3\u8a00\u4eba\u201d\u8fde\u952e\u76d8<code>focus<\/code>\u72b6\u6001\u4e5f\u4e00\u8d77\u4ee3\u8a00\u4e86\uff1a<\/p>\n<pre>:focus + label.btn {\n    outline: 1px dotted Highlight;\n    outline: 5px auto -webkit-focus-ring-color;\n}<\/pre>\n<p>\u4e5f\u5c31\u662f\u5f53\u6211\u4eec<code>focus<\/code>\u770b\u4e0d\u89c1\u7684\u63d0\u4ea4\u6309\u94ae\u7684\u65f6\u5019\uff0c\u8ba9\u201c\u4ee3\u8a00\u4eba\u201d<code>&lt;label&gt;<\/code>\u5143\u7d20\u6a21\u62df\u539f\u751f\u7684<code>focus<\/code>\u9ad8\u4eae\u6548\u679c\u3002\u4e8e\u662f\uff0cChrome\u548cIE\u6d4f\u89c8\u5668\u4e0b\u7684\u6548\u679c\u5206\u522b\u5982\u4e0b\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_160854.png\" width=\"331\" height=\"125\" alt=\"Chrome\u4e0bfocus outline\u9ad8\u4eae\u6548\u679c\u793a\u610f\" class=\"alignnone\" \/> <img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_160914.png\" width=\"295\" height=\"160\" alt=\"IE\u6d4f\u89c8\u5668\u4e0b\u7684focus\u9ad8\u4eae\u6548\u679c\" class=\"alignnone\" \/><\/p>\n<p>\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u7684\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/study\/201704\/label-submit-button-keybord.html\" target=\"_blank\">label\u6807\u7b7e\u548c\u8868\u5355\u5143\u7d20\u4e4b\u95f4\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027demo<\/a><\/p>\n<p>\u5c0ftips: <code>:focus<\/code>\u4f2a\u7c7b\u548c<code>outline<\/code>\u90fd\u662fIE8\u6d4f\u89c8\u5668\u5f00\u59cb\u652f\u6301\u7684\u3002<\/p>\n<h3>\u4e09\u3001CSS hover\u663e\u793a\u9690\u85cf\u5185\u5bb9\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027<\/h3>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u6211\u5217\u8868\u5143\u7d20\u4fe1\u606f\u5f88\u591a\uff0c\u4e3a\u4e86\u9632\u6b62\u89c6\u89c9\u5e72\u6270\uff0c\u4e00\u4e9b\u64cd\u4f5c\u6309\u94ae\u5728\u9f20\u6807hover\u5f53\u524d\u5217\u8868\u7684\u65f6\u5019\u624d\u663e\u793a\uff0c\u5982\u4e0b\u56fe\u793a\u610f\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_162613.png\" width=\"375\" height=\"202\" alt=\"hover\u65f6\u5019\u6309\u94ae\u624d\u663e\u793a\" class=\"alignnone\" \/><\/p>\n<p>\u5f88\u591a\u5c0f\u4f19\u4f34\u5728\u5b9e\u73b0\u7684\u65f6\u5019\uff0c\u5e76\u6ca1\u6709\u8003\u8651\u5f88\u591a\uff0c\u5c31\u76f4\u63a5\u4f7f\u7528<code>display:none<\/code>\u9690\u85cf\uff0c\u6216\u8005<code>visibility:hidden<\/code>\u9690\u85cf\uff0c\u4e8e\u662f\u4f1a\u5bfc\u81f4\u9690\u85cf\u7684\u63a7\u4ef6\u5143\u7d20\u538b\u6839\u6ca1\u6cd5\u901a\u8fc7\u952e\u76d8\u8ba9\u5176\u663e\u793a\uff0c\u56e0\u4e3a\u8fd9\u4e24\u79cd\u9690\u85cf\u65b9\u5f0f\u4f1a\u8ba9\u5143\u7d20\u65e0\u6cd5\u88ab<code>focus<\/code>\uff0c\u90a3\u8be5\u600e\u4e48\u529e\u5462\uff1f\u53ef\u4ee5\u8bd5\u8bd5\u4f7f\u7528\u900f\u660e\u5ea6<code>opacity<\/code>\u63a7\u5236\u5185\u5bb9\u7684\u663e\u9690\uff0c\u4e8e\u662f\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u901a\u8fc7<code>:focus<\/code>\u4f2a\u7c7b\u8ba9\u6309\u94ae<code>focus<\/code>\u65f6\u5019\u53ef\u89c1\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>tr .btn {\n    opacity: 0;\n    filter: alpha(opacity=0);\n}\ntr:hover .btn,\n<span style=\"color:#cd0000;\">tr .btn:focus<\/span> {\n    opacity: 1;\n    filter: none;\n}<\/pre>\n<p>\u6548\u679c\u793a\u610f\u56fe\u5982\u4e0b\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_164034.png\" width=\"381\" height=\"218\" alt=\"\u900f\u660e\u5ea6\u9690\u85cf\u6309\u94aefocus\u65f6\u5019\u4f9d\u7136\u53ef\u89c1\" class=\"alignnone\" \/><\/p>\n<p>\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/study\/201704\/css-hover-visible-opacity-keybord.html\" target=\"_blank\">CSS hover\u663e\u793a\u5143\u7d20\u4ea4\u4e92\u7684\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027demo<\/a><\/p>\n<p>\u5c0ftips: \u5148\u70b9\u51fb\u53f3\u4fa7\u5c55\u793a\u7a7a\u767d\u533a\u57df\uff0c\u5728Tab\u952e\u7d22\u5f15\uff0c\u53ef\u4ee5\u5feb\u901f<code>focus<\/code>\u5230\u76ee\u6807\u5143\u7d20\u3002<\/p>\n<h3>\u56db\u3001CSS hover\u663e\u793a\u4e0b\u62c9\u5185\u5bb9\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027<\/h3>\n<p>\u7ecf\u5e38\u6709\u4e0b\u62c9\u5185\u5bb9\u9700\u8981\u70b9\u51fb\u6216\u8005\u9f20\u6807hover\u65f6\u5019\u663e\u793a\u3002<\/p>\n<p>\u5982\u679c\u662f\u8fd9\u7c7b\u4ea4\u4e92\uff0c\u540c\u65f6\u5e0c\u671b\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u826f\u597d\uff0c\u90a3\u8be5\u600e\u4e48\u529e\u5462\uff1f<\/p>\n<p>\u9996\u5148\u4e00\u5b9a\u8981\u6709\u952e\u76d8\u53ef\u8bbf\u95ee\u7684\u89e6\u53d1\u6e90\uff0c\u4e5f\u5c31\u662f\u65e0\u8bba\u662f\u70b9\u51fb\u533a\u8fd8\u662fhover\u533a\u57df\uff0c\u4e00\u5b9a\u8981\u6709\u4e2a<code>&lt;a&gt;<\/code>\u6807\u7b7e\uff0c\u6216\u8005\u539f\u751f\u6309\u94ae\uff0c\u6216\u8005\u8bbe\u7f6e\u4e86<code>tabindex<\/code>\u7684\u666e\u901a\u5143\u7d20\u3002<\/p>\n<p>\u7136\u540e\uff0c\u55ef\u2026\u2026\u60c5\u51b5\u8fd8\u6709\u70b9\u5c0f\u590d\u6742\uff0c\u4e3a\u4e86\u4fbf\u4e8e\u7406\u89e3\uff0c\u6211\u4eec\u628a\u4ea4\u4e92\u5f62\u5f0f\u548c\u5b9e\u73b0\u539f\u7406\uff0c\u5206\u4e3a\u4e0b\u9762\u56db\u7c7b:<\/p>\n<ol>\n<li>\u5217\u8868HTML\u7ed3\u6784\u4f9d\u8d56\uff0c\u4f7f\u7528CSS\u5b9a\u4f4d\uff0chover\u663e\u793a\uff1b<\/li>\n<li>\u5217\u8868HTML\u7ed3\u6784\u4f9d\u8d56\uff0c\u4f7f\u7528CSS\u5b9a\u4f4d\uff0cclick\u663e\u793a\uff1b<\/li>\n<li>\u5217\u8868HTML\u7ed3\u6784\u4e0d\u4f9d\u8d56\uff0c\u4f7f\u7528JS\u5b9a\u4f4d\uff0chover\u663e\u793a\uff1b<\/li>\n<li>\u5217\u8868HTML\u7ed3\u6784\u4e0d\u4f9d\u8d56\uff0c\u4f7f\u7528JS\u5b9a\u4f4d\uff0cclick\u663e\u793a\uff1b<\/li>\n<\/ol>\n<p>\u4f8b\u5982\uff0c\u5bfc\u822a\u4e0a\u7684\u4e8c\u7ea7\u83dc\u5355\u5e38\u4f7f\u7528CSS\u8fdb\u884c\u5b9a\u4f4d\uff0c\u5bf9HTML\u7ed3\u6784\u6709\u8981\u6c42\uff1b\u800c\u641c\u7d22\u7684\u81ea\u52a8\u4e0b\u62c9\u63d0\u793a\u5217\u8868\u5219\u51e0\u4e4e\u90fd\u4f7f\u7528JS\u8fdb\u884c\u5b9a\u4f4d\uff0c\u5217\u8868\u76f4\u63a5\u521b\u5efa\u4e8e<code>&lt;body&gt;<\/code>\u6807\u7b7e\u4e0b\uff0c\u5bf9HTML\u7ed3\u6784\u65e0\u4f9d\u8d56\u3002<\/p>\n<p>\u9488\u5bf9\u4e0a\u9762\u56db\u79cd\u60c5\u51b5\uff0c\u6211\u9700\u8981\u989d\u5916\u8fdb\u884c\u7684\u5904\u7406\u5206\u522b\u662f\uff1a<\/p>\n<ol>\n<li>\u589e\u52a0:focus\u63a7\u5236\uff1b<\/li>\n<li>\u65e0\u9700\u989d\u5916\u5904\u7406\uff1b<\/li>\n<li>\u589e\u52a0JS <code>focus<\/code>\u4e8b\u4ef6\u5904\u7406\uff0c\u5904\u7406\u7ec6\u8282\u540c<code>mouseenter<\/code>\uff1b<\/li>\n<li>\u65e0\u9700\u989d\u5916\u5904\u7406\uff1b<\/li>\n<\/ol>\n<p>\u62ff\u7b2c\u4e00\u79cd\u60c5\u51b5\u4e3e\u4f8b\uff0c\u5982\u4e0b\u7b80\u6613\u7684hover\u663e\u793a\u5217\u8868HTML\u548cCSS\uff1a<\/p>\n<pre>&lt;a href=\"javascript:\" class=\"trigger\"&gt;\u66f4\u591a\u64cd\u4f5c\u25be&lt;\/a&gt;\n&lt;div class=\"list\"&gt;\n    &lt;a href=\"javascript:\"&gt;\u7f16\u8f91&lt;\/a&gt;\n    &lt;a href=\"javascript:\"&gt;\u5220\u9664&lt;\/a&gt;\n&lt;\/div&gt;<\/pre>\n<p>CSS\u4ea4\u4e92\u76f8\u5173\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>.list {\n    position: absolute;\n    visibility: hidden;\n}\n.trigger:hover + .list,\n<span style=\"color:#cd0000;\">.trigger:focus + .list<\/span> {\n    visibility: visible;\n}<\/pre>\n<p>\u5176\u4e2d\uff0c\u4e0a\u9762CSS\u4ee3\u7801\u6807\u7ea2\u9ad8\u4eae\u7684\u5c31\u662f\u589e\u52a0\u7684<code>:focus<\/code>\u63a7\u5236\uff0c\u4e8e\u662f\u5f53<code>focus<\/code>\u6211\u4eec\u7684\u201c\u66f4\u591a\u64cd\u4f5c\u201d\u5bf9\u5e94\u7684<code>&lt;a&gt;<\/code>\u5143\u7d20\u7684\u65f6\u5019\uff0c\u5217\u8868\u4e5f\u4f1a\u663e\u793a\u51fa\u6765\uff0c\u5b8c\u5168\u7528\u4e0d\u5230\u9f20\u6807\u51fa\u573a\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_195832.png\" width=\"228\" height=\"159\" alt=\"focus\u65f6\u5019\u663e\u793a\u5217\u8868\u7684\u5904\u7406\" class=\"alignnone\" \/><\/p>\n<p>\u7136\u800c\uff0c\u4e8b\u60c5\u5e76\u6ca1\u6709\u7ed3\u675f\uff0c\u901a\u8fc7<code>:focus<\/code>\u8ba9\u539f\u672c\u9690\u85cf\u7684\u5217\u8868\u51fa\u73b0\u4ec5\u4ec5\u662f\u7b2c\u4e00\u6b65\uff0c\u56e0\u4e3a\u5217\u8868\u4e2d\u7684\u5143\u7d20\u5f80\u5f80\u4e5f\u662f\u53ef\u4ee5<code>focus<\/code>\u7684\uff0c\u94fe\u63a5\u6216\u8005\u64cd\u4f5c\u6309\u94ae\u4e4b\u7c7b\u7684\uff0c\u8be5\u5982\u4f55\u4f7f\u7528\u952e\u76d8\u8bbf\u95ee\u8fd9\u4e9b\u5143\u7d20\u5462\uff01\u5982\u679c\u8fd8\u662f\u4f7f\u7528<code>Tab<\/code>\u952e\u4e00\u5b9a\u4f1a\u51fa\u95ee\u9898\uff0c\u56e0\u4e3a\u89e6\u53d1\u6e90\u5931\u7126\uff0c\u5217\u8868\u5c31\u4f1a\u9690\u85cf\uff0c\u800c\u4e14DOM\u987a\u5e8f\u5e76\u4e0d\u80fd\u4fdd\u8bc1\uff0c\u5c24\u5176\u5f53\u4e0b\u62c9\u6d6e\u5c42\u5185\u5bb9\u662f\u4f7f\u7528JS\u521b\u5efa\u548c\u5b9a\u4f4d\u7684\u65f6\u5019\u3002<\/p>\n<p>\u6211\u4eec\u53ef\u4ee5\u4ece\u4e0b\u62c9\u6846\u4e2d\u5bfb\u627e\u5230\u7075\u611f\uff0c\u4e5f\u5c31\u662f\u5f53\u8fd9\u4e9b\u6d6e\u5c42\u663e\u793a\u7684\u65f6\u5019\uff0c\u901a\u8fc7\u4e0a\u4e0b\u5de6\u53f3\u952e\u8fdb\u884c\u63a7\u5236\uff0c\u4f46\u662f\uff0c\u5bf9\u4e8e\u666e\u901a\u5143\u7d20\u800c\u8a00\uff0c\u4e0a\u4e0b\u952e\u662f\u4e0d\u4f1a\u81ea\u52a8\u9009\u4e2d\u63a7\u4ef6\u5143\u7d20\u7684\uff0c\u53ea\u4f1a\u6eda\u52a8\u9875\u9762\uff0c\u9762\u5bf9\u8fd9\u79cd\u573a\u666f\uff0c\u6211\u4eec\u9700\u8981\u4e00\u6bb5\u989d\u5916\u7684\u811a\u672c\u5bf9<code>:focus<\/code>\u51fa\u73b0\u7684\u4e0b\u62c9\u5185\u5bb9\u8fdb\u884c\u7d22\u5f15\u63a7\u5236\u548c\u56de\u8f66\u652f\u6301\u3002<\/p>\n<p><strong>\u589e\u5f3a\u952e\u76d8\u8bbf\u95ee\u7684JS\u4ee3\u7801<\/strong><\/p>\n<p>\u6211\u521a\u82b1\u4e86\u4e00\u4f1a\u513f\u65f6\u95f4\u628a\u8fd9\u6bb5JS\u5199\u597d\u4e86\uff0c\u5f88\u77ed\uff0c\u5305\u62ec\u6ce8\u91ca100\u884c\u4e0d\u5230\uff0c\u6211\u5df2\u7ecf\u653e\u5230\u672c\u7ad9\u7684\u5fae\u7801\u4e2d\u53bb\u4e86\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/php\/microCodeDetail.php?id=8\" target=\"_blank\" class=\"a_link\">\u5fae\u7801-\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u4e4bfocus\u663e\u793a\u7684\u4e0b\u62c9\u6216\u6d6e\u5c42\u7684\u7d22\u5f15\u548c\u56de\u8f66\u652f\u6301<\/a><\/p>\n<p>\u539f\u751fJS\u4e66\u5199\uff0c\u517c\u5bb9IE9+\u6d4f\u89c8\u5668\uff0cIE8\u6d4f\u89c8\u5668\u8c03\u7528\u4e0d\u4f1a\u62a5\u9519\uff0c\u653e\u5fc3\u5f15\u5165\u3002<\/p>\n<p>CSS\u548cHTML\u9700\u8981\u4e00\u70b9\u70b9\u7684\u914d\u5408\uff0c\u4e0b\u62c9\u6216\u6d6e\u5c42\u4e2d\u6309\u94ae\u6216\u94fe\u63a5\u7684\u9009\u4e2d\u6837\u5f0f\u662f\u901a\u8fc7\u589e\u52a0\u7c7b\u540d<code>outline<\/code>\u5b9e\u73b0\u7684\uff0c\u6240\u4ee5\u9700\u8981\uff1a<\/p>\n<pre>.outline {\n    outline: 1px dotted Highlight;\n    outline: 5px auto -webkit-focus-ring-color;\n}<\/pre>\n<p>HTML\u8fd9\u5757\uff0cJS\u9700\u8981\u77e5\u9053\u5f53\u524d<code>focus<\/code>\u5143\u7d20\u5bf9\u5e94\u7684\u4e0b\u62c9\u6216\u6d6e\u5c42\u662f\u54ea\u4e00\u4e2a\uff0c\u56e0\u6b64\uff0c\u9700\u8981\u624b\u52a8\u6807\u8bb0\u4e0b\uff0c\u8bed\u6cd5\u4e3a\uff0c\u4f7f\u7528<code>target<\/code>\u6216\u8005<code>data-target<\/code>\u5c5e\u6027\uff0c\u5c5e\u6027\u503c\u548c\u4e0b\u62c9\u6216\u6d6e\u5c42\u5143\u7d20\u7684<code>id<\/code>\u4fdd\u6301\u4e00\u81f4\u5c31\u53ef\u4ee5\u3002\u4f8b\u5982\uff1a<\/p>\n<pre>&lt;a href=\"javascript:\" class=\"trigger\" <span style=\"color:#cd0000;\">data-target=\"list\"<\/span>&gt;\u66f4\u591a\u64cd\u4f5c\u25be&lt;\/a&gt;\n&lt;div <span style=\"color:#cd0000;\">id=\"list\"<\/span> class=\"list\"&gt;\n    &lt;a href=\"javascript:\"&gt;\u7f16\u8f91&lt;\/a&gt;\n    &lt;a href=\"javascript:\"&gt;\u5220\u9664&lt;\/a&gt;\n&lt;\/div&gt;<\/pre>\n<p>\u6b63\u5982\u4e0a\u9762\u793a\u610f\u7684\uff0c\u901a\u8fc7<code>data-target=\"list\"<\/code>\u8ba9\u89e6\u53d1\u5143\u7d20\u548c\u6211\u4eec\u7684\u5217\u8868\u53d1\u751f\u5173\u8054\u3002\u5f88\u7b80\u5355\u7684\u5904\u7406\uff0c\u7136\u540e\u952e\u76d8\u8bbf\u95ee\u6548\u679c\u5c31\u8fbe\u6210\u4e86\u3002<\/p>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"http:\/\/www.zhangxinxu.com\/study\/201704\/css-hover-list-keybord.html\" target=\"_blank\">CSS hover\u663e\u793a\u5143\u7d20\u4ea4\u4e92\u7684\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027demo<\/a><\/p>\n<p>\u4f8b\u5982\uff0cfocus\u6309\u94ae\uff0c\u7136\u540e\u5f80\u4e0b\u952e\u6309\u4e24\u4e0b\uff0c\u5c31\u4f1a\u8fd9\u6837\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/image.zhangxinxu.com\/image\/blog\/201704\/2017-04-23_204102.png\" width=\"204\" height=\"156\" alt=\"\u6d6e\u5c42\u5143\u7d20\u7684focus\u9009\u4e2d\u6548\u679c\" class=\"alignnone\" \/><\/p>\n<p>\u7136\u540e\u518d\u56de\u8f66\uff0c\u5c31\u76f8\u5f53\u4e8e\u70b9\u51fb\u4e86\u8fd9\u4e2a<code>focus<\/code>\u9009\u4e2d\u5143\u7d20\uff0c\u4ec0\u4e48\u6309\u94ae\u4e8b\u4ef6\u554a\uff0c\u94fe\u63a5\u8df3\u8f6c\u90fd\u53ef\u4ee5\u9884\u671f\u6267\u884c\u3002\u4e8e\u662f\uff0c\u6211\u4eec\u4ece\u5934\u5230\u5c3e\u7684\u4ea4\u4e92\u90fd\u4e0d\u9700\u8981\u9f20\u6807\u53c2\u4e0e\u4e86\uff0c\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u4e00\u7ea7\u68d2\uff01<\/p>\n<p>\u6700\u540e\u603b\u7ed3\u4e0b\u5c31\u662f\uff1a<\/p>\n<ol>\n<li>CSS\u5b9a\u4f4d\u589e\u52a0<code>:focus<\/code>\u663e\u793a\uff0cJS\u5b9a\u4f4d\u589e\u52a0<code>focus<\/code>\u4e8b\u4ef6\u663e\u793a\uff1b<\/li>\n<li>\u5f15\u5165\u4e0b\u62c9\u548c\u6d6e\u5c42\u7d22\u5f15\u548c\u56de\u8f66\u652f\u6301JS\uff1b<\/li>\n<li>\u7c98\u8d34<code>.outline<\/code>\u6837\u5f0f\uff0c\u4ee5\u53ca\u7b80\u5355\u7684HTML\u5173\u8054\u5c5e\u6027\u8bbe\u7f6e\uff1b<\/li>\n<\/ol>\n<p>\u5373\u53ef\u8ba9\u7f51\u7ad9\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u8fbe\u5230\u9876\u7ea7\uff0c\u6210\u672c\u53c8\u4e0d\u9ad8\uff0c\u53ef\u4ee5\u8bf4\u662f\u9ad8\u54c1\u8d28\u7f51\u7ad9\u5fc5\u5907\u826f\u836f\u3002<\/p>\n<h3>\u4e94\u3001\u66f4\u591a\u5173\u4e8e\u952e\u76d8\u53ef\u8bbf\u95ee\u6027<\/h3>\n<p>\u5b9e\u9645\u4e0a\uff0c\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u7684\u4ef7\u503c\u5c31\u7b97\u7528\u6237\u7684\u9f20\u6807\u662f\u6b63\u5e38\u7684\uff0c\u4e5f\u53ef\u4ee5\u5927\u5927\u5730\u4f53\u73b0\u3002<\/p>\n<p>\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u8f93\u5165\u6846\u7684\u56de\u8f66\u6267\u884c\uff0c\u867d\u7136\u8bf4\u5c0f\u767d\u7528\u6237\u8fd8\u662f\u4e60\u60ef\u70b9\u6309\u94ae\uff0c\u4f46\u662f\u5bf9\u4e8e\u4e00\u4e9b\u8d44\u6df1\u7f51\u866b\u7528\u6237\u800c\u8a00\uff0c\u5982\u679c\u4f60\u7684\u8868\u5355\u4f8b\u5982\u641c\u7d22\u5c45\u7136\u4e0d\u652f\u6301\u56de\u8f66\u529f\u80fd\uff0c\u4e00\u5b9a\u4f1a\u5728\u5185\u5fc3\u5492\u9a82\uff0c\u8fd9\u4e2a\u4ea7\u54c1\u4f53\u9a8c\u505a\u7684\u771f\u5dee\u3002<\/p>\n<p>\u6216\u8005\u8bf4\u641c\u7d22\u8f93\u5165\u6846\u7684\u81ea\u52a8\u63d0\u793a\u4e0b\u62c9\u4e0d\u652f\u6301\u4e0a\u4e0b\u952e\u5207\u6362\uff0c\u4e5f\u4f1a\u8ba9\u7528\u6237\u4e0d\u723d\u7684\uff0c\u660e\u660e\u53ef\u4ee5\u952e\u76d8\u641e\u5b9a\u7684\u4e8b\u60c5\uff0c\u975e\u8981\u903c\u6211\u8ba9\u6211\u7684\u5c0a\u624b\u79fb\u5230\u5230\u4e0d\u77e5\u4f55\u65b9\u7684\u9f20\u6807\u4e0a\u53bb\uff0c\u80af\u5b9a\u5fc3\u91cc\u96be\u53d7\u554a\u3002<\/p>\n<p>\u4f46\u662f\u5bf9\u4e8e\u672c\u6587\u6240\u4ecb\u7ecd\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u652f\u6301\uff0c\u4f60\u7684\u7f51\u7ad9\u5c31\u7b97\u4e0d\u652f\u6301\uff0c\u7528\u6237\u4e5f\u4e0d\u4f1a\u6709\u4ec0\u4e48\u610f\u89c1\u7684\uff0c\u4e0d\u662f\u8bf4\u7528\u6237\u6ca1\u8fd9\u4e2a\u9700\u6c42\uff0c\u800c\u662f\u8bf499%\u7684\u7f51\u7ad9\u5bf9\u952e\u76d8\u652f\u6301\u90fd\u662f\u8fd9\u5e45\u5c3f\u6027\uff0c\u666e\u901a\u7528\u6237\u81ea\u7136\u4f1a\u8ba4\u4e3a\u8fd9\u662f\u5e38\u6001\uff0c\u8fd9\u662f\u5c40\u9650\uff0c\u81ea\u7136\u4e5f\u5c31\u4e0d\u4f1a\u5728\u5fc3\u91cc\u4ea7\u751f\u5492\u9a82\u3002<\/p>\n<p>\u7136\u800c\uff0c\u6709\u4e9b\u9700\u6c42\u867d\u7136\u7528\u6237\u6ca1\u6709\u63d0\u51fa\u6765\uff0c\u5e76\u8868\u793a\u7528\u6237\u4e0d\u9700\u8981\u8fd9\u4e9b\u4e1c\u897f\uff0c\u5c31\u50cfiPhone\u4e00\u6837\uff0c\u628a\u597d\u7684\u4e1c\u897f\u51fa\u73b0\u4e4b\u540e\uff0c\u7528\u6237\u624d\u4f1a\u53d1\u73b0\uff0c\u539f\u6765\u6211\u4e4b\u524d\u8ba4\u4e3a\u65e0\u6240\u8c13\u7684\u4e8b\u60c5\uff0c\u5b9e\u9645\u4e0a\u662f\u5f88\u7cdf\u7cd5\u7684\uff0c\u4f53\u9a8c\u5f88\u5dee\u7684\u3002<\/p>\n<p>\u5982\u679c\u6211\u4eec\u628a\u7f51\u7ad9\u4f5c\u4e3a\u4e00\u4e2a\u4ea7\u54c1\uff0c\u5c31\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u8fd9\u4e00\u5757\u800c\u8a00\uff0c\u5b9e\u9645\u4e0a\u662f\u4e00\u4e2a\u53ef\u4ee5\u4ea7\u751f\u6df1\u8fdc\u5f71\u54cd\u7684\u529f\u80fd\u70b9\uff0c\u56e0\u4e3a\u5c31\u8fd9\u4e48\u4e00\u5c0f\u6b65\uff0c\u5c31\u7529\u4e8699%\u7f51\u7ad9\u4e00\u6761\u8857\u3002<\/p>\n<p>\u7b2c\u4e00\u6b65\uff0c\u5bf9\u6574\u7ad9\u7684\u952e\u76d8\u53ef\u8bbf\u95ee\u6027\u4ee5\u53ca\u65e0\u969c\u788d\u8bbf\u95ee\u505a\u826f\u597d\u7684\u9002\u914d\u548c\u517c\u5bb9\uff1b\u7b2c\u4e8c\u6b65\uff0c\u901a\u8fc7\u8fd0\u8425\u624b\u6bb5\u5bf9\u7528\u6237\u52a0\u4ee5\u5ba3\u4f20\u548c\u63a8\u5e7f\uff08\u8650\u60ef\u7684\u7528\u6237\u662f\u4e0d\u4f1a\u4e3b\u52a8\u5c1d\u8bd5\u662f\u5426\u952e\u76d8\u652f\u6301\u7684\uff09\uff1b\u7b2c\u4e09\u6b65\uff0c\u5f53\u7528\u6237\u4f7f\u7528\u5f97\u975e\u5e38\u723d\u4e4b\u540e\uff0c\u518d\u4f7f\u7528\u540c\u7c7b\u4ea7\u54c1\uff0c\u4f60\u4e00\u5b9a\u4f1a\u89c9\u5f97\u5176\u4ed6\u4ea7\u54c1\u505a\u7684\u771f**\u7684\uff0c\u4ea7\u54c1\u7684\u53e3\u7891\u5c31\u4f1a\u6162\u6162\u8d77\u6765\uff0c\u5bf9\u6574\u4e2a\u4f01\u4e1a\u54c1\u724c\u5f62\u8c61\uff0c\u751a\u81f3\u8fd0\u8425\u6536\u5165\u63d0\u9ad8\u90fd\u4f1a\u4ea7\u751f\u5e7f\u6cdb\u800c\u79ef\u6781\u7684\u5f71\u54cd\u3002<\/p>\n<p>\u6240\u8c13\u7528\u6237\u4f53\u9a8c\uff0c\u6211\u5c31\u662f\u628a\u8fd9\u4e9b\u8d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href=\"http:\/\/www.zhangxinxu.com\/wordpress\/2016\/08\/find-own-frontend-direction\/\">\u627e\u5230\u9002\u5408\u81ea\u5df1\u7684\u524d\u7aef\u53d1\u5c55\u65b9\u5411<\/a>\u201d\u8fd9\u7bc7\u62db\u8058\u6587\u7ae0\u53d1\u8868\u5230\u73b0\u5728\uff0c\u6536\u5230\u7684\u7b80\u5386\u5df2\u7ecf\u6709\u4e24\u4e09\u767e\u5c01\u4e86\uff0c\u6709\u5f88\u591a\u4eba\u4f1a\u6446\u4e0a\u5f88\u591aVue, React, 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