{"id":8163,"date":"2018-11-16T23:10:59","date_gmt":"2018-11-16T15:10:59","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=8163"},"modified":"2022-02-11T14:30:01","modified_gmt":"2022-02-11T06:30:01","slug":"html-js-set-css-css3-var%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2018\/11\/html-js-set-css-css3-var%e5%8f%98%e9%87%8f\/","title":{"rendered":"\u5982\u4f55\u5728HTML\u548cJS\u4e2d\u8bbe\u7f6e\u548c\u83b7\u53d6var CSS\u53d8\u91cf"},"content":{"rendered":"

by zhangxinxu<\/a> from https:\/\/www.zhangxinxu.com\/wordpress\/?p=8163<\/a>
\n\u672c\u6587\u53ef\u5168\u6587\u8f6c\u8f7d\uff0c\u4e2a\u4eba\u7f51\u7ad9\u65e0\u9700\u6388\u6743\uff0c\u53ea\u8981\u4fdd\u7559\u539f\u4f5c\u8005\u3001\u51fa\u5904\u4ee5\u53ca\u6587\u4e2d\u94fe\u63a5\u5373\u53ef\uff0c\u4efb\u4f55\u7f51\u7ad9\u5747\u53ef\u6458\u8981\u805a\u5408\uff0c\u5546\u7528\u8bf7\u8054\u7cfb\u6388\u6743\u3002<\/p>\n

\u4e00\u3001HTML\u6807\u7b7e\u4e2d\u8bbe\u7f6eCSS\u53d8\u91cf<\/h3>\n

\u5982\u4e0b\uff1a<\/p>\n

<div style=\"--color: #cd0000;\">\r\n    <img src=\"mm.jpg\" style=\"border: 10px solid var(--color);\">\r\n<\/div><\/pre>\n
\u76f4\u63a5\u6b63\u5e38CSS\u8bed\u53e5\u4e00\u6837\u5728style<\/code>\u5c5e\u6027\u4e2d\u8bbe\u7f6e\u5373\u53ef\u3002<\/p>\n
\u6548\u679c\u5982\u4e0b\u622a\u56fe\uff1a<\/p>\n
\"style\u8bbe\u7f6eCSS\u53d8\u91cf\u6548\u679c\u622a\u56fe\"<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a\u5728HTML\u6807\u7b7estyle\u4e2d\u8bbe\u7f6eCSS\u53d8\u91cfdemo<\/a> <\/p>\n
\u4e8c\u3001JS\u4e2d\u8bbe\u7f6eCSS\u53d8\u91cf<\/h3>\n
\u5982\u4e0b\uff0cHTML\u793a\u610f\uff1a<\/p>\n
<div id=\"box\">\r\n    <img src=\"mm.jpg\" style=\"border: 10px solid var(--color);\">\r\n<\/div><\/pre>\n
\u5982\u679c\u8981\u60f3\u8ba9var(--color)<\/code>\u751f\u6548\uff0c\u6267\u884c\u4e0b\u9762JavaScript\u4ee3\u7801\u5373\u53ef\uff1a<\/p>\n
box.style.setProperty('--color', '#cd0000');<\/pre>\n
\u4e5f\u5c31\u662f\u4f7f\u7528setProperty()<\/code>\u65b9\u6cd5\uff0c\u6548\u679c\u5982\u4e0bGIF\u622a\u5c4f\u793a\u610f\uff1a<\/p>\n
\"JS\u8bbe\u7f6eCSS\u53d8\u91cfgif\u622a\u56fe\"<\/p>\n
\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1aJS\u8bbe\u7f6eCSS\u53d8\u91cfdemo<\/a><\/p>\n
\u4e09\u3001JS\u4e2d\u83b7\u53d6CSS\u53d8\u91cf<\/h3>\n
JS\u4e2d\u83b7\u53d6CSS\u53d8\u91cf\u53ef\u4ee5\u4f7f\u7528getPropertyValue()<\/code>\u65b9\u6cd5\uff0c\u793a\u610f\uff1a<\/p>\n
\/\/ \u83b7\u53d6 --color CSS \u53d8\u91cf\u503c<\/span>\r\nvar cssVarColor = getComputedStyle(box).getPropertyValue('--color'); \r\n\r\n\/\/ \u8f93\u51facssVarColor\r\n\/\/ \u8f93\u51fa\u53d8\u91cf\u503c\u662f\uff1a#cd0000 <\/span>\r\nconsole.log(cssVarColor);<\/pre>\n
\u56db\u3001\u5173\u4e8eCSS3 var()\u53d8\u91cf<\/h3>\n
CSS3 var()<\/code>\u53d8\u91cf\u662f\u4e2a\u597d\u4e1c\u897f\uff0c2\u5e74\u524d\u4ecb\u7ecd\u7684\u65f6\u5019<\/a>\u8fd8\u6ca1\u591a\u5c11\u6d4f\u89c8\u5668\u652f\u6301\uff0c\u73b0\u5728\uff0cEdge16\u4e5f\u5df2\u7ecf\u5b8c\u5168\u652f\u6301\u4e86\u3002<\/p>\n
\"CSS<\/p>\n
\u66f4\u591a\u5173\u4e8eCSS\u539f\u751f\u53d8\u91cf\u7684\u7279\u6027\uff0c\u53ef\u4ee5\u53c2\u8003\u6211\u4e4b\u524d\u8fd9\u7bc7\u6587\u7ae0\uff1a\u201c\u4e86\u89e3CSS\/CSS3\u539f\u751f\u53d8\u91cfvar<\/a>\u201d\u3002<\/p>\n
\u4ee5\u4e0a\u5c31\u662f\u672c\u6587\u5168\u90e8\u5185\u5bb9\uff0c\u611f\u8c22\u9605\u8bfb\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\uff1ahttps:\/\/www.zhangxinxu.com\/wordpress\/?p=8163<\/a><\/p>\n
\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"
\"CSS\u53d8\u91cfJS\u8bbe\u7f6e\u83b7\u53d6\u7f29\u7565\u56fe\"<\/p>\n
\u6211\u4eec\u5728CSS\u6587\u4ef6\u6216\u8005CSS\u8bed\u6cd5\u4e2d\u4f7f\u7528CSS\u539f\u751f\u53d8\u91cf\u9a7e\u8f7b\u5c31\u719f\uff0c\u4f46\u662f\u5982\u4f55\u901a\u8fc7JS\u4ee3\u7801\u52a8\u6001\u521b\u5efa\u6216\u8005\u6539\u53d8CSS\u53d8\u91cf\u503c\u6015\u662f\u5f88\u591a\u4eba\u5c31\u4e0d\u77e5\u9053\u4e86\u3002\u672c\u6587\u5c31\u6f14\u793a\u4e0b\u5982\u4f55\u5728HTML\u6807\u7b7e\u548cJS\u4e2d\u8bbe\u7f6eCSS3 var\u53d8\u91cf\uff0c\u5982\u4f55\u4f7f\u7528JS\u4ee3\u7801\u83b7\u53d6CSS\u53d8\u91cf\u503c\u3002\u672c\u6587\u4e0d\u5570\u55e6\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u5230\u4f60\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[180],"tags":[177,714,715,1273,1359,575,1089,503],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8163"}],"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=8163"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/8163\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=8163"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=8163"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=8163"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}