{"id":2924,"date":"2020-04-27T15:47:38","date_gmt":"2020-04-27T07:47:38","guid":{"rendered":"http:\/\/www.yuguoxy.com\/geekhome\/?p=2924"},"modified":"2026-08-18T12:35:30","modified_gmt":"2026-08-18T04:35:30","slug":"css%e5%8f%98%e9%87%8f%e6%95%99%e7%a8%8b","status":"publish","type":"post","link":"https:\/\/ai.zhousir.top\/?p=2924","title":{"rendered":"css\u53d8\u91cf\u6559\u7a0b"},"content":{"rendered":"
\n

\u5f53\u5fae\u8f6f\u5ba3\u5e03 Edge \u5c06\u652f\u6301 CSS \u53d8\u91cf\u65f6\uff0c\u8fd9\u9879\u80fd\u529b\u5728\u4e3b\u8981\u6d4f\u89c8\u5668\u91cc\u5df2\u7ecf\u9f50\u4e86\u3002\u539f\u751f CSS \u4ece\u6b64\u53ef\u4ee5\u58f0\u660e\u53ef\u590d\u7528\u7684\u81ea\u5b9a\u4e49\u5c5e\u6027\uff0c\u518d\u7528 var()<\/code> \u8bfb\u51fa\u6765\u3002\u53d8\u91cf\u540d\u7528\u4e24\u6839\u8fde\u8bcd\u7ebf --<\/code>\uff0c\u56e0\u4e3a $foo<\/code> \u88ab Sass \u5360\u7528\uff0c@foo<\/code> \u88ab Less \u5360\u7528\u3002<\/p>\n

CSS \u53d8\u91cf\u53c8\u53eb CSS \u81ea\u5b9a\u4e49\u5c5e\u6027<\/strong>\uff08CSS custom properties\uff09\uff1a\u548c color\u3001font-size \u4e00\u6837\u5199\u5728\u89c4\u5219\u91cc\uff0c\u53ea\u662f\u6ca1\u6709\u9ed8\u8ba4\u542b\u4e49\u3002\u53d8\u91cf\u540d\u5927\u5c0f\u5199\u654f\u611f\uff0c--header-color<\/code> \u548c --Header-Color<\/code> \u662f\u4e24\u4e2a\u53d8\u91cf\u3002<\/p>\n

\u4e00\u3001\u53d8\u91cf\u7684\u58f0\u660e<\/h2>\n

\u58f0\u660e\u65f6\u53d8\u91cf\u540d\u524d\u9762\u52a0\u4e24\u6839\u8fde\u8bcd\u7ebf\uff1a<\/p>\n

body {\n  --foo: #7F583F;\n  --bar: #F7EFD2;\n}<\/code><\/pre>\n
\u4e0a\u9762\u5728 body \u91cc\u58f0\u660e\u4e86 --foo<\/code> \u548c --bar<\/code>\u3002\u5404\u79cd\u503c\u90fd\u53ef\u4ee5\u653e\u8fdb CSS \u53d8\u91cf\uff1a<\/p>\n
:root{\n  --main-color: #4d4e53;\n  --main-bg: rgb(255, 255, 255);\n  --logo-border-color: rebeccapurple;\n\n  --header-height: 68px;\n  --content-padding: 10px 20px;\n\n  --base-line-height: 1.428571429;\n  --transition-duration: .35s;\n  --external-link: \"external link\";\n  --margin-top: calc(2vh + 20px);\n}<\/code><\/pre>\n
\u4e8c\u3001var() \u51fd\u6570<\/h2>\n
var()<\/code> \u7528\u4e8e\u8bfb\u53d6\u53d8\u91cf\uff1a<\/p>\n
a {\n  color: var(--foo);\n  text-decoration-color: var(--bar);\n}<\/code><\/pre>\n
\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u9ed8\u8ba4\u503c\uff0c\u53d8\u91cf\u4e0d\u5b58\u5728\u65f6\u4f7f\u7528\uff1a<\/p>\n
color: var(--foo, #7F583F);<\/code><\/pre>\n
\u7b2c\u4e8c\u4e2a\u53c2\u6570\u4e0d\u5904\u7406\u5185\u90e8\u7684\u9017\u53f7\u6216\u7a7a\u683c\uff0c\u90fd\u89c6\u4f5c\u53c2\u6570\u7684\u4e00\u90e8\u5206\uff1a<\/p>\n
var(--font-stack, \"Roboto\", \"Helvetica\");\nvar(--pad, 10px 15px 20px);<\/code><\/pre>\n
var() \u4e5f\u53ef\u4ee5\u7528\u5728\u53d8\u91cf\u7684\u58f0\u660e\u91cc\uff1a<\/p>\n
:root {\n  --primary-color: red;\n  --logo-text: var(--primary-color);\n}<\/code><\/pre>\n
\u6ce8\u610f\uff1a\u53d8\u91cf\u503c\u53ea\u80fd\u5f53\u5c5e\u6027\u503c\uff0c\u4e0d\u80fd\u5f53\u5c5e\u6027\u540d\uff1a<\/p>\n
.foo {  --side: margin-top;  \/* \u65e0\u6548 *\/  var(--side): 20px;}<\/code><\/pre>\n\n\n\n\n\n\n\n\n
\u5199\u6cd5<\/th>\n\u542b\u4e49<\/th>\n<\/tr>\n<\/thead>\n
--foo: #7F583F;<\/code><\/td>\n\u58f0\u660e\u81ea\u5b9a\u4e49\u5c5e\u6027<\/td>\n<\/tr>\n
var(--foo)<\/code><\/td>\n\u8bfb\u53d6<\/td>\n<\/tr>\n
var(--foo, #7F583F)<\/code><\/td>\n\u8bfb\u53d6\uff0c\u7f3a\u7701\u7528\u7b2c\u4e8c\u53c2<\/td>\n<\/tr>\n
var(--side): 20px<\/code><\/td>\n\u5f53\u5c5e\u6027\u540d\uff0c\u65e0\u6548<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
\u4e09\u3001\u53d8\u91cf\u503c\u7684\u7c7b\u578b<\/h2>\n
\u5982\u679c\u53d8\u91cf\u503c\u662f\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u548c\u5176\u5b83\u5b57\u7b26\u4e32\u62fc\u63a5\uff1a<\/p>\n
--bar: 'hello';\n--foo: var(--bar)' world';<\/code><\/pre>\n
\u5229\u7528\u8fd9\u4e00\u70b9\u53ef\u4ee5 debug\uff1a<\/p>\n
body:after {\n  content: '--screen-category : 'var(--screen-category);\n}<\/code><\/pre>\n
\u5982\u679c\u53d8\u91cf\u503c\u662f\u6570\u503c\uff0c\u4e0d\u80fd\u548c\u5355\u4f4d\u76f4\u63a5\u8fde\u7528\uff1a<\/p>\n
.foo {\n  --gap: 20;\n  \/* \u65e0\u6548 *\/\n  margin-top: var(--gap)px;\n}<\/code><\/pre>\n
\u5fc5\u987b\u7528 calc()<\/code> \u628a\u5b83\u4eec\u8fde\u8d77\u6765\uff1a<\/p>\n
.foo {\n  --gap: 20;\n  margin-top: calc(var(--gap) * 1px);\n}<\/code><\/pre>\n
\u5982\u679c\u53d8\u91cf\u503c\u5e26\u5355\u4f4d\uff0c\u5c31\u4e0d\u80fd\u5199\u6210\u5b57\u7b26\u4e32\uff1a<\/p>\n
\/* \u65e0\u6548 *\/.foo {  --foo: '20px';  font-size: var(--foo);}\n\/* \u6709\u6548 *\/.foo {  --foo: 20px;  font-size: var(--foo);}<\/code><\/pre>\n
\u56db\u3001\u4f5c\u7528\u57df<\/h2>\n
\u540c\u4e00\u4e2a CSS \u53d8\u91cf\u53ef\u4ee5\u5728\u591a\u4e2a\u9009\u62e9\u5668\u91cc\u58f0\u660e\u3002\u8bfb\u53d6\u65f6\u4f18\u5148\u7ea7\u6700\u9ad8\u7684\u58f0\u660e\u751f\u6548\uff0c\u8fd9\u548c CSS \u7684\u5c42\u53e0\uff08cascade\uff09\u4e00\u81f4\u3002\u4e0b\u9762\u8fd9\u6bb5\u91cc\u4e09\u6bb5\u6587\u5b57\u989c\u8272\u4e0d\u540c\uff1a<\/p>\n
<style>\n  :root { --color: blue; }\n  div { --color: green; }\n  #alert { --color: red; }\n  * { color: var(--color); }\n<\/style>\n\n<p>\u84dd\u8272<\/p>\n<div>\u7eff\u8272<\/div>\n<div id=\"alert\">\u7ea2\u8272<\/div><\/code><\/pre>\n
\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u5c31\u662f\u5b83\u6240\u5728\u9009\u62e9\u5668\u7684\u6709\u6548\u8303\u56f4\uff1a<\/p>\n
body {\n  --foo: #7F583F;\n}\n\n.content {\n  --bar: #F7EFD2;\n}<\/code><\/pre>\n
--foo<\/code> \u7684\u4f5c\u7528\u57df\u662f body\uff0c--bar<\/code> \u7684\u4f5c\u7528\u57df\u662f .content<\/code>\u3002\u5168\u5c40\u53d8\u91cf\u901a\u5e38\u653e :root<\/code>\uff1a<\/p>\n
:root {\n  --main-color: #06c;\n}<\/code><\/pre>\n
\u4e94\u3001\u54cd\u5e94\u5f0f\u5e03\u5c40<\/h2>\n
CSS \u662f\u52a8\u6001\u7684\u3002\u53ef\u5728 media \u91cc\u6539\u53d8\u91cf\uff0c\u8ba9\u4e0d\u540c\u5c4f\u5e55\u5bbd\u5ea6\u7528\u4e0d\u540c\u503c\uff1a<\/p>\n
body {\n  --primary: #7F583F;\n  --secondary: #F7EFD2;\n}\n\na {\n  color: var(--primary);\n  text-decoration-color: var(--secondary);\n}\n\n@media screen and (min-width: 768px) {\n  body {\n    --primary:  #F7EFD2;\n    --secondary: #7F583F;\n  }\n}<\/code><\/pre>\n
\u516d\u3001\u517c\u5bb9\u6027\u5904\u7406<\/h2>\n
\u4e0d\u652f\u6301 CSS \u53d8\u91cf\u7684\u6d4f\u89c8\u5668\uff0c\u53ef\u4ee5\u5148\u5199\u56de\u9000\u503c\uff1a<\/p>\n
a {\n  color: #7F583F;\n  color: var(--primary);\n}<\/code><\/pre>\n
\u4e5f\u53ef\u4ee5\u7528 @supports<\/code> \u68c0\u6d4b\uff1a<\/p>\n
@supports ( (--a: 0)) {\n  \/* supported *\/\n}\n\n@supports ( not (--a: 0)) {\n  \/* not supported *\/\n}<\/code><\/pre>\n
\u4e03\u3001JavaScript \u64cd\u4f5c<\/h2>\n
JS \u4e5f\u80fd\u68c0\u6d4b\u662f\u5426\u652f\u6301 CSS \u53d8\u91cf\uff1a<\/p>\n
const isSupported =  window.CSS &&  window.CSS.supports &&  window.CSS.supports('--a', 0);if (isSupported) {  \/* supported *\/} else {  \/* not supported *\/}<\/code><\/pre>\n
\u8bfb\u5199\u3001\u5220\u9664\u7684\u5199\u6cd5\uff1a<\/p>\n
\/\/ \u8bbe\u7f6e\u53d8\u91cf\ndocument.body.style.setProperty('--primary', '#7F583F');\n\n\/\/ \u8bfb\u53d6\u53d8\u91cf\ndocument.body.style.getPropertyValue('--primary').trim();\n\/\/ '#7F583F'\n\n\/\/ \u5220\u9664\u53d8\u91cf\ndocument.body.style.removeProperty('--primary');<\/code><\/pre>\n
\u8fd9\u610f\u5473\u7740 JS \u53ef\u4ee5\u628a\u4efb\u610f\u503c\u5b58\u8fdb\u6837\u5f0f\u8868\u3002\u76d1\u542c\u9f20\u6807\u5c31\u662f\u628a\u5750\u6807\u5199\u5165\u53d8\u91cf\uff1a<\/p>\n
const docStyle = document.documentElement.style;\n\ndocument.addEventListener('mousemove', (e) => {\n  docStyle.setProperty('--mouse-x', e.clientX);\n  docStyle.setProperty('--mouse-y', e.clientY);\n});<\/code><\/pre>\n
\u5bf9 CSS \u65e0\u7528\u7684\u4fe1\u606f\u4e5f\u53ef\u4ee5\u653e\u8fdb\u53d8\u91cf\uff0c\u4f9b JS \u8bfb\u53d6\uff1a<\/p>\n
--foo: if(x > 5) this.width = 10;<\/code><\/pre>\n
\u4e0a\u9762 --foo<\/code> \u5728 CSS \u91cc\u662f\u65e0\u6548\u8bed\u53e5\uff0c\u4f46 JS \u8bfb\u5f97\u5230\u3002\u53ef\u4ee5\u628a\u6837\u5f0f\u8bbe\u5b9a\u5199\u5728 CSS \u53d8\u91cf\u91cc\uff0c\u8ba9 JS \u6765\u8bfb\u3002CSS \u53d8\u91cf\u56e0\u6b64\u662f JS \u4e0e CSS \u901a\u4fe1\u7684\u4e00\u6761\u8def\u3002<\/p>\n
\u516b\u3001\u6d4f\u89c8\u5668\u652f\u6301<\/h2>\n
\u5f53\u65f6\u5168\u7403\u7f51\u7ad9\u6d41\u91cf\u7ea6 77% \u652f\u6301 CSS \u53d8\u91cf\uff0c\u7f8e\u56fd\u63a5\u8fd1 90%\u3002Scrimba.com \u5df2\u7ecf\u5728\u7528\uff0c\u56e0\u4e3a\u5ba2\u6237\u5927\u591a\u4f7f\u7528\u73b0\u4ee3\u6d4f\u89c8\u5668\u3002<\/p>\n
\"\"\"20200427084200\"<\/a><\/p>\n
\n
\u4e00\u53e5\u8bdd\u603b\u7ed3\uff1a\u7528 –name \u58f0\u660e\u81ea\u5b9a\u4e49\u5c5e\u6027\uff0c\u7528 var() \u8bfb\u53d6\uff08\u53ef\u5e26\u9ed8\u8ba4\u503c\uff09\uff1b\u4f5c\u7528\u57df\u8ddf\u9009\u62e9\u5668\u8d70\uff0c\u5168\u5c40\u653e :root\uff0cmedia \u91cc\u53ef\u6539\u503c\uff0cJS \u7528 setProperty \/ getPropertyValue \u901a\u4fe1\u3002<\/strong><\/p>\n<\/blockquote>\n<\/section>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u5fae\u8f6f\u5ba3\u5e03 Edge \u5c06\u652f\u6301 CSS \u53d8\u91cf\u65f6\uff0c\u8fd9\u9879\u80fd\u529b\u5728\u4e3b\u8981\u6d4f\u89c8\u5668\u91cc\u5df2\u7ecf\u9f50\u4e86\u3002\u539f\u751f CSS \u4ece\u6b64\u53ef\u4ee5\u58f0\u660e\u53ef\u590d\u7528 […]<\/p>\n","protected":false},"author":1,"featured_media":3498,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[109,105],"tags":[142,150],"_links":{"self":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2924"}],"collection":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2924"}],"version-history":[{"count":2,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2924\/revisions"}],"predecessor-version":[{"id":3811,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2924\/revisions\/3811"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/media\/3498"}],"wp:attachment":[{"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2924"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2924"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2924"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}