{"id":8669,"date":"2019-05-28T22:24:48","date_gmt":"2019-05-28T14:24:48","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8669"},"modified":"2019-05-31T23:12:37","modified_gmt":"2019-05-31T15:12:37","slug":"content-css-var","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2019\/05\/content-css-var\/","title":{"rendered":"\u5c0ftips: \u5982\u4f55\u501f\u52a9content\u5c5e\u6027\u663e\u793aCSS var\u53d8\u91cf\u503c"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8669\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8669<\/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<br \/>\n<script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/201901-css-var.jpg';<\/script><\/p>\n<p><img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201811\/css-var-cover2.jpg\" width=\"484\" height=\"300\" loading=\"lazy\" class=\"alignright clip\" alt=\"CSS\u53d8\u91cf\u7f29\u7565\u56fe\"><\/p>\n<h3>\u4e00\u3001\u53d8\u91cf\u4f5c\u4e3a\u5b57\u7b26\u52a8\u6001\u5448\u73b0<\/h3>\n<p>CSS var\u53d8\u91cf\uff08CSS\u81ea\u5b9a\u4e49\u5c5e\u6027\uff09\u5f88\u597d\u7528\uff0c\u7136\u540e\uff0c\u6709\u65f6\u5019\uff0c\u9700\u8981\u8fd9\u4e9b\u53d8\u91cf\u80fd\u591f\u540c\u65f6\u4f5c\u4e3a\u5b57\u7b26\u5728\u9875\u9762\u4e2d\u5448\u73b0\uff0c\u6211\u4eec\u60f3\u5230\u7684\u662f\u4f7f\u7528<code>::before\/::after<\/code>\u4f2a\u5143\u7d20\u914d\u5408<code>content<\/code>\u5c5e\u6027\uff0c\u4f46\u662f\uff0c\u628aCSS\u53d8\u91cf\u76f4\u63a5\u4f5c\u4e3a<code>content<\/code>\u5c5e\u6027\u503c\u662f\u6ca1\u6709\u4efb\u4f55\u6548\u679c\u7684\u3002<\/p>\n<p>\u4f8b\u5982\uff1a<\/p>\n<pre><span style=\"color:#ff0000;\">\/* \u65e0\u6548 *\/<\/span>\r\n.bar::before {\r\n    content: var(--percent);\r\n}<\/pre>\n<p>\u90a3\u8be5\u5982\u4f55\u5448\u73b0\u5462\uff1f<\/p>\n<h3>\u4e8c\u3001\u501f\u52a9CSS\u8ba1\u6570\u5668\u5448\u73b0CSS var\u53d8\u91cf\u503c<\/h3>\n<p>\u793a\u610f\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre><span style=\"color:green;\">\/* \u6709\u6548 *\/<\/span>\r\n.bar::before {\r\n    counter-reset: progress var(--percent);\r\n    content: counter(progress);\r\n}<\/pre>\n<p>\u4e5f\u5c31\u662f\u867d\u7136<code>content<\/code>\u5c5e\u6027\u672c\u8eab\u4e0d\u652f\u6301\u53d8\u91cf\uff0c\u4f46\u662f<code>counter-reset<\/code>\u5c5e\u6027\u540e\u9762\u7684\u8ba1\u6570\u5668\u521d\u59cb\u503c\u662f\u652f\u6301\u7684\uff0c\u4e8e\u662f\u6211\u4eec\u53ef\u4ee5\u6765\u4e00\u62db\u79fb\u82b1\u63a5\u6728\u8ba9CSS var\u53d8\u91cf\u503c\u4f5c\u4e3a\u5b57\u7b26\u5728\u9875\u9762\u4e2d\u663e\u793a\u3002<\/p>\n<p>\u5173\u4e8eCSS\u8ba1\u6570\u5668\u5982\u679c\u4e0d\u592a\u4e86\u89e3\uff0c\u53ef\u4ee5\u53c2\u8003\u6211\u4e4b\u524d\u8fd9\u7bc7\u6587\u7ae0\uff1a\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/2014\/08\/css-counters-automatic-number-content\/\">CSS counter\u8ba1\u6570\u5668(content\u76ee\u5f55\u5e8f\u53f7\u81ea\u52a8\u9012\u589e)\u8be6\u89e3<\/a>\u201d\u3002<\/p>\n<h3>\u4e09\u3001\u5b9e\u9645\u5e94\u7528\u6848\u4f8b\u5c55\u793a<\/h3>\n<p>\u4f8b\u5982\u6211\u4eec\u9700\u8981\u5b9e\u73b0\u4e00\u4e2a\u8fdb\u5ea6\u6761\u6548\u679c\uff0c\u5df2\u7ecf\u52a0\u8f7d\u5b8c\u6210\u4e86\u90e8\u5206\u7684\u5bbd\u5ea6\u767e\u5206\u6bd4\u503c\u548c\u8fdb\u5ea6\u503c\u662f\u4e00\u6837\u7684\uff0c\u6700\u597d\u53ef\u4ee5\u901a\u8fc7\u4e00\u4e2a\u53d8\u91cf\u63a7\u5236\uff0c\u8fd9\u6837\u4f1a\u5927\u5927\u7b80\u5316\u6211\u4eec\u7684\u5b9e\u73b0\u3002<\/p>\n<p>\u6b64\u65f6\uff0cCSS var\u53d8\u91cf\u975e\u5e38\u9002\u5408\u4f7f\u7528\u3002<\/p>\n<p>\u4f8b\u5982\u4e0b\u56fe\u6240\u793a\u7684\u6548\u679c\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201901\/2019-01-26_003635.png\" width=\"440\" height=\"280\" alt=\"\u5355\u6807\u7b7e\u4e0e\u53d8\u91cf\u5b9e\u73b0\u7684\u4e0a\u4f20\u8fdb\u5ea6\u6761\u6548\u679c\" class=\"alignnone size-medium\"><\/p>\n<p>HTML\u7ed3\u6784\u975e\u5e38\u7b80\u5355\uff0c\u5c31\u662f\u4e00\u4e2a\u5355\u6807\u7b7e\uff0c\u6ca1\u6709\u4efb\u4f55\u5d4c\u5957\uff1a<\/p>\n<pre>&lt;label&gt;\u56fe\u72471\uff1a&lt;\/label&gt;\r\n&lt;div class=\"bar\" style=\"--percent: 60;\"&gt;&lt;\/div&gt;\r\n&lt;label&gt;\u56fe\u72472\uff1a&lt;\/label&gt;\r\n&lt;div class=\"bar\" style=\"--percent: 40;\"&gt;&lt;\/div&gt;\r\n&lt;label&gt;\u56fe\u72473\uff1a&lt;\/label&gt;\r\n&lt;div class=\"bar\" style=\"--percent: 20;\"&gt;&lt;\/div&gt;<\/pre>\n<p>\u5173\u952e\u662fCSS\uff0c\u8fd9\u91cc\u5c31\u5e94\u7528\u4e86\u8fd9\u91cc\u7684CSS\u53d8\u91cf\u503c\u5448\u73b0\u6280\u5de7\uff0c\u89c1\u4e0b\u9762\u4ee3\u7801\u7ea2\u8272\u9ad8\u4eae\u90e8\u5206\uff1a<\/p>\n<pre>.bar {\r\n    height: 20px; width: 300px;\r\n    background-color: #f5f5f5;\r\n}\r\n.bar::before {\r\n    display: block;\r\n    <span style=\"color:#cd0000;\">counter-reset: progress var(--percent);\r\n    content: counter(progress) '%\\2002';\r\n    width: calc(1% * var(--percent));<\/span>\r\n    color: #fff;\r\n    background-color: #2486ff;\r\n    text-align: right;\r\n    white-space: nowrap;\r\n    overflow: hidden;\r\n}<\/pre>\n<p>\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/study\/201901\/css-var-progress-bar-demo.php\" rel=\"noopener\" target=\"_blank\">CSS\u767e\u5206\u6bd4\u53d8\u91cf\u4e0e\u8fdb\u5ea6\u6761demo<\/a><\/p>\n<h3>\u56db\u3001\u5c0f\u5c0f\u7ed3\u675f\u8bed<\/h3>\n<p>\u867d\u7136\u662f\u4e2a\u5c0f\u6280\u5de7\uff0c\u4f46\u5f88\u5b9e\u7528\uff0c\u76ee\u524d\u6211\u5df2\u7ecf\u5728\u9879\u76ee\u4e2d\u591a\u6b21\u4f7f\u7528\uff0c\u5199\u8fd9\u7bc7\u6587\u7ae0\u4e5f\u662f\u65b9\u4fbf\u81ea\u5df1\u5feb\u901f\u67e5\u627e\uff0c\u5b9e\u9645\u7528\u7684\u65f6\u5019\u5c31\u628a\u4ee3\u7801\u62f7\u8d1d\u4e00\u4e0b\uff0c\u6539\u4e00\u4e0b\u53d8\u91cf\u540d\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n<p>\u629b\u7816\u5f15\u7389\uff0c\u5982\u679c\u9047\u5230\u5176\u4ed6\u9700\u8981\u52a8\u6001\u663e\u793a\u53d8\u91cf\u7684\u573a\u666f\uff0c\u4e5f\u53ef\u662f\u8bd5\u8bd5\u672c\u6587\u7684\u8fd9\u4e2a\u5448\u73b0\u6280\u5de7\u3002\u4f60\u4e0d\u5fc5\u73b0\u5728\u5c31\u7262\u8bb0\uff0c\u53ea\u8981\u6709\u4e2a\u5370\u8c61\u5c31\u53ef\u4ee5\u4e86\uff0c\u5230\u65f6\u5019\u8fdb\u53bb\u6211\u7684\u535a\u5ba2\uff0c\u641c\u7d22\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?s=CSS%E5%8F%98%E9%87%8F\" rel=\"noopener\" target=\"_blank\">CSS\u53d8\u91cf<\/a>\u201d\u6216\u8005\u76f4\u63a5\u641c\u7d22\u201c<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?s=var\" rel=\"noopener\" target=\"_blank\">var<\/a>\u201d\u5c31\u53ef\u4ee5\u627e\u5230\u672c\u6587\u4e86\u3002<\/p>\n<p>\u597d\uff0c\u6211\u8981\u8bf4\u7684\u8fd9\u4e9b\u5185\u5bb9\uff0c\u611f\u8c22\u9605\u8bfb\uff0c\u6b22\u8fce\u4ea4\u6d41\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f618.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\u5185\u5bb9\u4f60\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u4ee5\u52a0\u5165\u6536\u85cf\u5939\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u800c\u4e14\u8fd8\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u4ee5\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=8669\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=8669<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/201811\/css-var-cover2.jpg\" width=\"161\" height=\"100\" loading=\"lazy\" class=\"alignright\" alt=\"CSS\u53d8\u91cf\u7f29\u7565\u56fe\"><\/p>\n<p>\u501f\u52a9CSS\u8ba1\u6570\u5668\uff0c\u6211\u4eec\u53ef\u4ee5\u5de7\u5999\u5730\u5b9e\u73b0CSS var\u53d8\u91cf\u503c\u5728\u9875\u9762\u4e2d\u5448\u73b0\u7684\u6548\u679c\u3002\u8fd9\u662f\u4e00\u4e2a\u6240\u6709CSS\u5f00\u53d1\u4eba\u5458\u90fd\u5fc5\u987b\u8981\u638c\u63e1\u7684\u4e00\u4e2a\u5c0f\u6280\u5de7\u3002<\/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":[365,939,936,1089,823,503],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8669"}],"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=8669"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8669\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=8669"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=8669"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=8669"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}