{"id":9263,"date":"2020-02-13T17:35:20","date_gmt":"2020-02-13T09:35:20","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9263"},"modified":"2020-03-12T15:32:35","modified_gmt":"2020-03-12T07:32:35","slug":"css-params-to-js","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2020\/02\/css-params-to-js\/","title":{"rendered":"\u6211\u662f\u5982\u4f55\u901a\u8fc7CSS\u5411JS\u4f20\u53c2\u7684"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9263\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9263<\/a><br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\u4e0e\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u5c31\u4e0d\u5fc5\u4e86\uff0c\u5c0a\u91cd\u7248\u6743\uff0c\u5708\u5b50\u5c31\u8fd9\u4e48\u5927\uff0c\u82e5\u6025\u7528\u53ef\u4ee5\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202002-css-params-js.jpg';<\/script><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202002\/css-params-js.jpg\" width=\"480\" height=\"300\" alt=\"\u5934\u56fe\u5360\u4f4d\u56fe\" class=\"alignright thumb clip size-medium\" \/><\/p>\n<h3>\u4e00\u3001\u9700\u8981\u901a\u8fc7CSS\u4f20\u53c2\u7684\u80cc\u666f<\/h3>\n<p>CSS\u4e2d\u6709\u5f88\u591a\u5a92\u4f53\u67e5\u8be2\u7684\u7528\u6cd5\uff0c\u4f8b\u5982\u8bbe\u5907\u5c3a\u5bf8\u5224\u522b\uff0c\u662f\u5426\u652f\u6301\u9f20\u6807\u884c\u4e3a\uff0c\u662f\u5426\u662f\u9ed1\u6697\u6a21\u5f0f\uff0c\u662f\u5426\u662f\u7701\u7535\u6a21\u5f0f\u7b49\u3002<\/p>\n<p>\u6bd4\u65b9\u8bf4\u6700\u8fd1\u7ecf\u5e38\u63d0\u5230\u7684\u9ed1\u6697\u6a21\u5f0f\uff0c\u6df1\u8272\u4e3b\u9898\uff1a<\/p>\n<pre>@media (prefers-color-scheme: dark) {\r\n    <span style=\"color:green;\">\/* \u9ed1\u6697\u6a21\u5f0f\uff0c\u6df1\u8272\u4e3b\u9898 *\/<\/span>\r\n}\r\n\r\n@media (prefers-color-scheme: light) {\r\n    <span style=\"color:green;\">\/* \u6d45\u8272\u4e3b\u9898 *\/<\/span>\r\n}<\/pre>\n<p>CSS\u53ef\u4ee5\u81ea\u52a8\u68c0\u6d4b\uff0c\u4f46\u662f\u6709\u65f6\u5019\uff0c\u5728JS\u4e2d\uff0c\u6211\u4eec\u4e5f\u9700\u8981\u6839\u636e\u4e0d\u540c\u7684\u7cfb\u7edf\u4e3b\u9898\uff0c\u7136\u540e\u5b9e\u73b0\u4e0d\u540c\u7684\u4ea4\u4e92\u903b\u8f91\uff0c\u6216\u8005\u6e32\u67d3\u51fa\u4e0d\u4e00\u6837\u7684\u5185\u5bb9\u3002<\/p>\n<p>\u600e\u4e48\u529e\uff1f\u4f3c\u4e4e\u4e00\u65f6\u95f4\u4e5f\u627e\u4e0d\u5230\u73b0\u6210\u7684JS API\u6765\u68c0\u6d4b\u7cfb\u7edf\u6a21\u5f0f\uff0c\u53ea\u80fd\u501f\u52a9\u4e8eCSS\u4e2d\u4f20\u53c2\u4e86\u3002\u8fd9\u5c31\u662f\u4e00\u4e2a\u5178\u578b\u7684\u573a\u666f\uff0c\u7c7b\u4f3c\u7684\u573a\u666f\u8fd8\u6709\u5f88\u591a\u3002<\/p>\n<p><strong>\u66f4\u65b0\u4e8e2020-02-26<\/strong><\/p>\n<p>\u5a92\u4f53\u67e5\u8be2\u6709JS API\u68c0\u6d4b\uff0c\u4e3a<code>window.matchMedia()<\/code>\uff0cIE10+\u6d4f\u89c8\u5668\u652f\u6301\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<h4>1. CSS\u548cJS\u8fb9\u754c\u5bbd\u5ea6\u4e00\u81f4\u6027<\/h4>\n<p>\u6211\u4eec\u5728\u505a\u54cd\u5e94\u5f0f\u5e03\u5c40\u7684\u65f6\u5019\uff0c\u7ecf\u5e38\u4f1a\u9700\u8981\u8bbe\u5b9a\u4e00\u4e2a\u4e34\u754c\u5bbd\u5ea6\u503c\uff0c\u4f8b\u5982\u5f53\u8bbe\u5907\u7684\u5bbd\u5ea6\u5c0f\u4e8e640\u50cf\u7d20\u7684\u65f6\u5019\uff0c\u6211\u4eec\u5c31\u8ba4\u4e3a\u662f\u8fdb\u5165\u4e86\u79fb\u52a8\u7aef\uff1b\u6216\u8005\u662f\u5bbd\u5ea6\u5c0f\u4e8e480\u7684\u50cf\u7d20\u7684\u65f6\u5019\uff0c\u5c31\u4f7f\u7528\u79fb\u52a8\u7aef\u5e03\u5c40\u7b49\u3002<\/p>\n<p>\u6b64\u65f6\uff0cJavaScript\u4ee3\u7801\u4e5f\u9700\u8981\u6839\u636e\u8fd9\u4e2a\u4e34\u754c\u5bbd\u5ea6\u5b9e\u73b0\u4e0d\u540c\u7684\u4ea4\u4e92\u6548\u679c\uff0c\u5927\u4e8e\u591a\u5c11\u7684\u65f6\u5019\u662fPC\u7684\u4ea4\u4e92\uff0c\u5c0f\u4e8e\u591a\u5c11\u7684\u65f6\u5019\u662f\u79fb\u52a8\u7aef\u5e03\u5c40\u4e0b\u7684\u4ea4\u4e92\u3002<\/p>\n<p>\u5f88\u591a\u4eba\u5728\u5b9e\u9645\u5f00\u53d1\u7684\u65f6\u5019\u5c31CSS\u4ee3\u7801\u548cJS\u4ee3\u7801\u7ea6\u5b9a\u4e00\u4e0b\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>@media screen and (max-width: 480px) {\r\n    <span style=\"color:green;\">\/* \u5c0f\u5c4f\u5e55\u5bbd\u5ea6\u4e0b\u7684\u54cd\u5e94\u5f0f\u5e03\u5c40 *\/<\/span>\r\n}<\/pre>\n<pre>if (screen.width < 480) {\r\n    <span style=\"color:green;\">\/* \u5c0f\u5c4f\u5e55\u5bbd\u5ea6\u4e0b\u7684\u4ea4\u4e92\u884c\u4e3a *\/<\/span>\r\n}<\/pre>\n<p>\u8981\u662f\u8fd9\u79cd\u7ea6\u5b9a\u4f1a\u6709\u4e00\u4e2a\u95ee\u9898\uff0c\u7b49\u9879\u76ee\u8fc7\u4e86\u4e00\u6bb5\u65f6\u95f4\u4e4b\u540e\uff0c\u53d1\u73b0\u8fd9\u4e2a\u4e34\u754c\u5bbd\u5ea6\u6709\u95ee\u9898\uff0c\u6bd4\u65b9\u8bf4\u624b\u673a\u6a2a\u5c4f\u7684\u65f6\u5019\uff0c\u5b83\u7684\u5bbd\u5ea6\u662f\u5927\u4e8e<code>480px<\/code>\u7684\uff0c\u4e5f\u5e94\u8be5\u662f\u79fb\u52a8\u7aef\u7684\u5e03\u5c40\u65b9\u5f0f\uff0c\u4e8e\u662f\u5f00\u53d1\u5c31\u6539\u6210\u4e86<code>640px<\/code>\u3002<\/p>\n<pre>@media screen and (max-width: 640px) {\r\n    <span style=\"color:green;\">\/* \u5c0f\u5c4f\u5e55\u5bbd\u5ea6\u4e0b\u7684\u54cd\u5e94\u5f0f\u5e03\u5c40 *\/<\/span>\r\n}<\/pre>\n<p>\u7ed3\u679c\u5fd8\u8bb0JS\u4ee3\u7801\u4e2d\u4e5f\u6709\u8fd9\u4e00\u832c\u5224\u65ad\uff0c\u7ed3\u679c\u5c31\u4f1a\u51fa\u73b0bug\u3002<\/p>\n<p>\u5982\u679c\u539f\u5148\u5b9e\u73b0\u7684\u65f6\u5019\uff0c\u6211\u4eec\u7684JavaScript\u4ee3\u7801\u4e2d\u7684\u5c4f\u5e55\u5224\u65ad\u662f\u57fa\u4e8eCSS\u4f20\u53c2\u7684\u8bdd\uff0c\u90a3\u5c31\u4e0d\u4f1a\u6709\u8fd9\u6837\u5b50\u7684\u7ef4\u62a4\u95ee\u9898\u51fa\u73b0\u3002<\/p>\n<h4>2. \u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301:hover\u4f2a\u7c7b\u4ea4\u4e92<\/h4>\n<p>\u6211\u4eec\u4f1a\u5f00\u53d1\u4e00\u4e9bui\u7ec4\u4ef6\uff0c\u5e0c\u671b\u5728\u684c\u9762\u7aef\u548c\u79fb\u52a8\u7aef\uff0c\u4ee5\u53ca\u7269\u8054\u7f51\u8bbe\u5907\u4e0a\u901a\u7528\u3002<\/p>\n<p>\u6709\u4e9b\u7ec4\u4ef6\u5728\u684c\u9762\u5f53\u6211\u4eec\u4f7f\u7528<code>mouseenter<\/code>\u6216\u8005<code>mouseover<\/code>\u4e8b\u4ef6\u6765\u5b9e\u73b0\u4f53\u9a8c\u8fd8\u662f\u5f88\u4e0d\u9519\u7684\uff0c\u975e\u5e38\u4fbf\u6377\u3002\u4f46\u662f\u5982\u679c\u8fd9\u4e9b\u4e1c\u897f\u7528\u5728\u79fb\u52a8\u7aef\u4ee5\u53ca\u5176\u4ed6\u4e00\u4e9b\u89e6\u5c4f\u8bbe\u5907\u4e0a\uff0c\u5219\u8fd9\u4e2a\u4e16\u754c\u5c31\u6709\u95ee\u9898\u554a\uff0c\u56e0\u4e3a\u6ca1\u6709\u8fd9\u79cdhover\u7684\u8bf4\u6cd5\u3002<\/p>\n<p>\u597d\u5728CSS\u4ee3\u7801\u4e2d\u662f\u6709\u5173\u4e8e\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301:hover\u4f2a\u7c7b\u4ea4\u4e92\u5a92\u4f53\u67e5\u8be2\u5224\u65ad\uff08\u6b64\u67e5\u8be2\u6709\u4e13\u95e8\u6587\u7ae0\u4ecb\u7ecd\uff0c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2020\/01\/css-any-hover-media\/\">\u70b9\u51fb\u8fd9\u91cc<\/a>\uff09\uff1a<\/p>\n<pre>@media (any-hover: none) {\r\n    <span style=\"color:green;\">\/* \u8bbe\u5907\u4e0d\u652f\u6301hover\u4e8b\u4ef6 *\/<\/span>\r\n}<\/pre>\n<p>\u53ef\u60dcJS\u4e2d\u5e76\u6ca1\u6709\u8fd9\u6837\u7684API\u76f4\u63a5\u5224\u65ad\u3002\u5f88\u591a\u4eba\u5e94\u8be5\u662f\u901a\u8fc7\u5224\u65ad\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301<code>touchstart<\/code>\u4e4b\u7c7b\u7684\u4e8b\u4ef6\u6765\u8fdb\u884c\u5224\u65ad\u7684\u3002\u4e0d\u8fc7\u53ef\u60dc\u8fd9\u79cd\u5224\u65ad\u65b9\u6cd5\u662f\u4e0d\u51c6\u786e\u7684\u3002\u56e0\u4e3a\u5f88\u591a\u89e6\u6478\u8bbe\u5907\u4e5f\u662f\u53ef\u4ee5\u8fde\u63a5\u9f20\u6807\u8bbe\u5907\u7684\uff0c\u6b64\u65f6hover\u4e8b\u4ef6\u4e5f\u5e94\u8be5\u88ab\u826f\u597d\u652f\u6301\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u6700\u540e\u7684\u65b9\u6cd5\u8fd8\u662f\u901a\u8fc7CSS\u5a92\u4f53\u67e5\u8be2\u5224\u65ad\uff0c\u7136\u540e\u628a\u8fd9\u4e2a\u5224\u65ad\u7ed3\u679c\u4ee5\u53c2\u6570\u5f62\u5f0f\u4f20\u9012\u7ed9js\u3002<\/p>\n<p>\u597d\u5566\uff0c\u4e0b\u9762\u95ee\u9898\u6765\u4e86\uff0c\u4e0a\u9762\u4e3e\u4e86\u8fd9\u4e09\u4e2a\u6848\u4f8b\uff0c\u6211\u4eec\u5982\u4f55\u901a\u8fc7CSS\u628a\u6211\u4eec\u7684\u53c2\u6570\u4f20\u9012\u7ed9JS\u4ee3\u7801\u5462\uff1f<\/p>\n<h3>\u4e8c\u3001CSS\u4f20\u53c2\u7ed9JS\u7684\u65b9\u6cd5<\/h3>\n<style>@media (any-hover: none) {\n    body::before {\n        content: 'hoverNone';\n        display: none;\n    }\n}:root {\n    --mode: 'unknown';\n}@media (prefers-color-scheme: dark) {\n    <span style=\"color:green;\">\/* \u9ed1\u6697\u6a21\u5f0f *\/<\/span>\n    :root {\n         --colorLink: #bfdbff;\n         --colorMark: #cc0000;\n         --colorText: #ffffff;\n         --colorLight: #777777;\n    }\n}\n@media (prefers-color-scheme: light) {\n    <span style=\"color:green;\">\/* \u6d45\u8272\u4e3b\u9898 *\/<\/span>\n    :root {\n         --colorLink: #34538b;\n         --colorMark: #cc0000;\n         --colorText: #000000;\n         --colorLight: #cccccc;\n    }\n}<\/style>\n<p>\u901a\u5e38\u501f\u52a9CSS\u5411JS\u4f20\u53c2\uff0c\u6211\u90fd\u662f\u4f7f\u7528\u4e0b\u9762\u8fd9\u4e24\u79cd\u65b9\u6cd5\u3002<\/p>\n<h4>1. content\u4f2a\u5143\u7d20\u5185\u5bb9\u4f20\u53c2<\/h4>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre>@media (any-hover: none) {\r\n    body::before {\r\n        content: 'hoverNone';\r\n        display: none;\r\n    }\r\n}<\/pre>\n<p>\u6b64\u65f6\u5c31\u53ef\u4ee5\u901a\u8fc7JS\u4ee3\u7801\u83b7\u53d6body\u4f2a\u5143\u7d20\u4f20\u9012\u7684\u4fe1\u606f\u662f\u4ec0\u4e48\u4e86\uff1a<\/p>\n<pre>var strContent = getComputedStyle(document.body, '::before').content;\r\n<span style=\"color:green;\">\/\/ strContent\u7ed3\u679c\u662f'none'\u5219\u8868\u793a\u652f\u6301hover\r\n\/\/ strContent\u7ed3\u679c\u662f'\"hoverNone\"'\u5219\u8868\u793a\u4e0d\u652f\u6301hover\u7ecf\u8fc7\uff0c\u9700\u8981\u6362\u6210click\u4e8b\u4ef6<\/span>\r\n<\/pre>\n<p>\u672c\u6587\u5c31\u9884\u57cb\u4e86\u4e0a\u9762\u8fd9\u6837\u7684CSS\u4ee3\u7801\uff0c\u56e0\u6b64\uff0cChrome\u6d4f\u89c8\u5668\u4e0b\uff0c\u6253\u5f00\u63a7\u5236\u53f0\uff0c\u8fdb\u5165\u79fb\u52a8\u7aef\u9884\u89c8\u6a21\u5f0f\uff0c\u8f93\u5165JS\u6d4b\u8bd5\u4e0b\uff0c\u53ef\u4ee5\u770b\u5230\u6211\u4eecCSS\u4f20\u9012\u7684\u5b57\u7b26\u4e32\u4fe1\u606f\u88abJS\u83b7\u53d6\u5230\u4e86\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/202002\/2020-02-13_164139.png\" width=\"648\" height=\"252\" alt=\"\u5f53\u524d\u6587\u7ae0\u9875\u8dd1JS\u540e\u7684\u7ed3\u679c\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u6b64\u65f6\uff0c\u6211\u4eec\u5c31\u53ef\u4ee5\u6839\u636e<code>::before<\/code>, <code>::after<\/code>\u4f2a\u5143\u7d20\u914d\u5408<code>content<\/code>\u5c5e\u6027\uff0c\u83b7\u77e5CSS\u4e2d\u4f20\u9012\u7684\u4fe1\u606f\u4e86\u3002<\/p>\n<p>\u8fd9\u79cd\u4f20\u53c2\u65b9\u5f0f\u7684\u4f18\u70b9\u5728\u4e8e\u517c\u5bb9\u6027\u76f8\u5bf9\u8f83\u597d\uff0c\u4f46\u662f\u4e0d\u8db3\u5374\u4e5f\u5f88\u660e\u663e\uff0c\u90a3\u5c31\u662f\u6211\u4eec\u4f20\u9012\u7684\u53c2\u6570\u503c\u7684\u6570\u91cf\u662f\u6709\u9650\u7684\uff0c\u5982\u679c\u6211\u4eec\u60f3\u4e00\u6b21\u6027\u4f20\u591a\u4e2a\u503c\uff0c\u5c31\u6709\u4e9b\u6349\u895f\u89c1\u8098\uff0c\u6b64\u65f6\u53ef\u4ee5\u8bd5\u8bd5\u4e0b\u9762\u8fd9\u79cd\u65b9\u6cd5\uff0c\u501f\u52a9CSS\u81ea\u5b9a\u4e49\u5c5e\u6027\u3002<\/p>\n<h4>2. CSS\u81ea\u5b9a\u4e49\u5c5e\u6027\uff08CSS\u53d8\u91cf\uff09\u4f20\u53c2<\/h4>\n<p>\u76f4\u63a5\u4e0a\u4ee3\u7801\uff0c\u6709\u4e86<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2016\/11\/css-css3-variables-var\/\">CSS\u81ea\u5b9a\u4e49\u5c5e\u6027\uff08CSS\u53d8\u91cf\uff09<\/a>\uff0c\u9ed1\u6697\u6a21\u5f0f\u548c\u6d45\u8272\u6a21\u5f0f\u7684\u5f00\u53d1\u548c\u7ef4\u62a4\u5de5\u4f5c\u5c31\u53d8\u5f97\u76f8\u5bf9\u5bb9\u6613\u5f88\u591a\uff0c\u9664\u6b64\u4e4b\u5916\uff0c\u8fd9\u4e2aCSS\u81ea\u5b9a\u4e49\u5c5e\u6027\u6211\u4eec\u8fd8\u53ef\u4ee5\u7528\u6765\u7ed9JS\u505a\u6a21\u5f0f\u8bc6\u522b\u3002<\/p>\n<pre>\r\n:root {\r\n    --mode: 'unknown';\r\n}\r\n@media (prefers-color-scheme: dark) {\r\n    <span style=\"color:green;\">\/* \u9ed1\u6697\u6a21\u5f0f *\/<\/span>\r\n    :root {\r\n         --mode: 'dark';\r\n         --colorLink: #bfdbff;\r\n         --colorMark: #cc0000;\r\n         --colorText: #ffffff;\r\n         --colorLight: #777777;\r\n    }\r\n}\r\n@media 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src=\"\/\/image.zhangxinxu.com\/image\/blog\/202002\/2020-02-13_170415.png\" width=\"470\" height=\"143\" alt=\"\u4f20\u7684\u503c\" class=\"alignnone size-medium\" \/><\/p>\n<p>\u5728Mac OS 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decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/2764.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u6536\u85cf\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u4e14\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u53ca\u4fee\u6b63\u9519\u8bef\uff0c\u9605\u8bfb\u4f53\u9a8c\u4e5f\u66f4\u597d\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9263\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9263<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202002\/css-params-js.jpg\" width=\"160\" height=\"100\" alt=\"\u5934\u56fe\u5360\u4f4d\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" 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