{"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":"2020-04-27T15:47:38","modified_gmt":"2020-04-27T07:47:38","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":"

\u5f53\u5fae\u8f6f\u5ba3\u5e03 Edge \u6d4f\u89c8\u5668\u5c06\u652f\u6301 CSS \u53d8\u91cf\u3002\u8fd9\u4e2a\u91cd\u8981\u7684 CSS \u65b0\u529f\u80fd\uff0c\u6240\u6709\u4e3b\u8981\u6d4f\u89c8\u5668\u5df2\u7ecf\u90fd\u652f\u6301\u4e86\u3002\u672c\u6587\u5168\u9762\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528\u5b83\uff0c\u4f60\u4f1a\u53d1\u73b0\u539f\u751f CSS \u4ece\u6b64\u53d8\u5f97\u5f02\u5e38\u5f3a\u5927\u3002<\/p>\n

 <\/p>\n

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

\u58f0\u660e\u53d8\u91cf\u7684\u65f6\u5019\uff0c\u53d8\u91cf\u540d\u524d\u9762\u8981\u52a0\u4e24\u6839\u8fde\u8bcd\u7ebf\uff08–\uff09\u3002<\/p>\n

body {\r\n  --foo: #7F583F;\r\n  --bar: #F7EFD2;\r\n}\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0cbody\u9009\u62e9\u5668\u91cc\u9762\u58f0\u660e\u4e86\u4e24\u4e2a\u53d8\u91cf\uff1a–foo\u548c–bar\u3002<\/p>\n
\u5b83\u4eec\u4e0ecolor\u3001font-size\u7b49\u6b63\u5f0f\u5c5e\u6027\u6ca1\u6709\u4ec0\u4e48\u4e0d\u540c\uff0c\u53ea\u662f\u6ca1\u6709\u9ed8\u8ba4\u542b\u4e49\u3002\u6240\u4ee5 CSS \u53d8\u91cf\uff08CSS variable\uff09\u53c8\u53eb\u505a”CSS \u81ea\u5b9a\u4e49\u5c5e\u6027”\uff08CSS custom properties\uff09\u3002\u56e0\u4e3a\u53d8\u91cf\u4e0e\u81ea\u5b9a\u4e49\u7684 CSS \u5c5e\u6027\u5176\u5b9e\u662f\u4e00\u56de\u4e8b\u3002<\/p>\n
\u4f60\u53ef\u80fd\u4f1a\u95ee\uff0c\u4e3a\u4ec0\u4e48\u9009\u62e9\u4e24\u6839\u8fde\u8bcd\u7ebf\uff08–\uff09\u8868\u793a\u53d8\u91cf\uff1f\u56e0\u4e3a$foo\u88ab Sass \u7528\u6389\u4e86\uff0c@foo\u88ab Less \u7528\u6389\u4e86\u3002\u4e3a\u4e86\u4e0d\u4ea7\u751f\u51b2\u7a81\uff0c\u5b98\u65b9\u7684 CSS \u53d8\u91cf\u5c31\u6539\u7528\u4e24\u6839\u8fde\u8bcd\u7ebf\u4e86\u3002<\/p>\n
\u5404\u79cd\u503c\u90fd\u53ef\u4ee5\u653e\u5165 CSS \u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
:root{\r\n  --main-color: #4d4e53;\r\n  --main-bg: rgb(255, 255, 255);\r\n  --logo-border-color: rebeccapurple;\r\n\r\n  --header-height: 68px;\r\n  --content-padding: 10px 20px;\r\n\r\n  --base-line-height: 1.428571429;\r\n  --transition-duration: .35s;\r\n  --external-link: \"external link\";\r\n  --margin-top: calc(2vh + 20px);\r\n}\r\n\r\n<\/code><\/pre>\n
\u53d8\u91cf\u540d\u5927\u5c0f\u5199\u654f\u611f\uff0c–header-color\u548c–Header-Color\u662f\u4e24\u4e2a\u4e0d\u540c\u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
\u4e8c\u3001var() \u51fd\u6570<\/strong><\/h2>\n
var()\u51fd\u6570\u7528\u4e8e\u8bfb\u53d6\u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
a {\r\n  color: var(--foo);\r\n  text-decoration-color: var(--bar);\r\n}\r\n\r\n<\/code><\/pre>\n
var()\u51fd\u6570\u8fd8\u53ef\u4ee5\u4f7f\u7528\u7b2c\u4e8c\u4e2a\u53c2\u6570\uff0c\u8868\u793a\u53d8\u91cf\u7684\u9ed8\u8ba4\u503c\u3002\u5982\u679c\u8be5\u53d8\u91cf\u4e0d\u5b58\u5728\uff0c\u5c31\u4f1a\u4f7f\u7528\u8fd9\u4e2a\u9ed8\u8ba4\u503c\u3002<\/p>\n
 <\/p>\n
color: var(--foo, #7F583F);\r\n<\/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\u3002<\/p>\n
 <\/p>\n
var(--font-stack, \"Roboto\", \"Helvetica\");\r\nvar(--pad, 10px 15px 20px);\r\n\r\n<\/code><\/pre>\n
var()\u51fd\u6570\u8fd8\u53ef\u4ee5\u7528\u5728\u53d8\u91cf\u7684\u58f0\u660e\u3002<\/p>\n
:root {\r\n  --primary-color: red;\r\n  --logo-text: var(--primary-color);\r\n}\r\n\r\n<\/code><\/pre>\n
\u6ce8\u610f\uff0c\u53d8\u91cf\u503c\u53ea\u80fd\u7528\u4f5c\u5c5e\u6027\u503c\uff0c\u4e0d\u80fd\u7528\u4f5c\u5c5e\u6027\u540d\u3002<\/p>\n
 <\/p>\n
.foo {  --side: margin-top;  \/* \u65e0\u6548 *\/  var(--side): 20px;}\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u53d8\u91cf–side\u7528\u4f5c\u5c5e\u6027\u540d\uff0c\u8fd9\u662f\u65e0\u6548\u7684\u3002<\/p>\n
 <\/p>\n
\u4e09\u3001\u53d8\u91cf\u503c\u7684\u7c7b\u578b<\/strong><\/h2>\n
\u5982\u679c\u53d8\u91cf\u503c\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32\uff0c\u53ef\u4ee5\u4e0e\u5176\u4ed6\u5b57\u7b26\u4e32\u62fc\u63a5\u3002<\/p>\n
 <\/p>\n
--bar: 'hello';\r\n--foo: var(--bar)' world';\r\n<\/code><\/pre>\n
\u5229\u7528\u8fd9\u4e00\u70b9\uff0c\u53ef\u4ee5 debug\uff08\u4f8b\u5b50\uff09\u3002<\/p>\n
 <\/p>\n
body:after {\r\n  content: '--screen-category : 'var(--screen-category);\r\n}\r\n\r\n<\/code><\/pre>\n
\u5982\u679c\u53d8\u91cf\u503c\u662f\u6570\u503c\uff0c\u4e0d\u80fd\u4e0e\u6570\u503c\u5355\u4f4d\u76f4\u63a5\u8fde\u7528\u3002<\/p>\n
 <\/p>\n
.foo {\r\n  --gap: 20;\r\n  \/* \u65e0\u6548 *\/\r\n  margin-top: var(--gap)px;\r\n}\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u6570\u503c\u4e0e\u5355\u4f4d\u76f4\u63a5\u5199\u5728\u4e00\u8d77\uff0c\u8fd9\u662f\u65e0\u6548\u7684\u3002\u5fc5\u987b\u4f7f\u7528calc()\u51fd\u6570\uff0c\u5c06\u5b83\u4eec\u8fde\u63a5\u3002<\/p>\n
 <\/p>\n
.foo {\r\n  --gap: 20;\r\n  margin-top: calc(var(--gap) * 1px);\r\n}\r\n<\/code><\/pre>\n
\u5982\u679c\u53d8\u91cf\u503c\u5e26\u6709\u5355\u4f4d\uff0c\u5c31\u4e0d\u80fd\u5199\u6210\u5b57\u7b26\u4e32\u3002<\/p>\n
 <\/p>\n
\/* \u65e0\u6548 *\/.foo {  --foo: '20px';  font-size: var(--foo);}\r\n\/* \u6709\u6548 *\/.foo {  --foo: 20px;  font-size: var(--foo);}\r\n<\/code><\/pre>\n
 <\/p>\n
\u56db\u3001\u4f5c\u7528\u57df<\/strong><\/h2>\n
\u540c\u4e00\u4e2a CSS \u53d8\u91cf\uff0c\u53ef\u4ee5\u5728\u591a\u4e2a\u9009\u62e9\u5668\u5185\u58f0\u660e\u3002\u8bfb\u53d6\u7684\u65f6\u5019\uff0c\u4f18\u5148\u7ea7\u6700\u9ad8\u7684\u58f0\u660e\u751f\u6548\u3002\u8fd9\u4e0e CSS \u7684”\u5c42\u53e0”\uff08cascade\uff09\u89c4\u5219\u662f\u4e00\u81f4\u7684\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e00\u4e2a\u4f8b\u5b50\u3002<\/p>\n
 <\/p>\n
<style>\r\n  :root { --color: blue; }\r\n  div { --color: green; }\r\n  #alert { --color: red; }\r\n  * { color: var(--color); }\r\n<\/style>\r\n\r\n<p>\u84dd\u8272<\/p>\r\n<div>\u7eff\u8272<\/div>\r\n<div id=\"alert\">\u7ea2\u8272<\/div>\r\n\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u4e09\u4e2a\u9009\u62e9\u5668\u90fd\u58f0\u660e\u4e86–color\u53d8\u91cf\u3002\u4e0d\u540c\u5143\u7d20\u8bfb\u53d6\u8fd9\u4e2a\u53d8\u91cf\u7684\u65f6\u5019\uff0c\u4f1a\u91c7\u7528\u4f18\u5148\u7ea7\u6700\u9ad8\u7684\u89c4\u5219\uff0c\u56e0\u6b64\u4e09\u6bb5\u6587\u5b57\u7684\u989c\u8272\u662f\u4e0d\u4e00\u6837\u7684\u3002<\/p>\n
\u8fd9\u5c31\u662f\u8bf4\uff0c\u53d8\u91cf\u7684\u4f5c\u7528\u57df\u5c31\u662f\u5b83\u6240\u5728\u7684\u9009\u62e9\u5668\u7684\u6709\u6548\u8303\u56f4\u3002<\/p>\n
 <\/p>\n
body {\r\n  --foo: #7F583F;\r\n}\r\n\r\n.content {\r\n  --bar: #F7EFD2;\r\n}\r\n\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c\u53d8\u91cf–foo\u7684\u4f5c\u7528\u57df\u662fbody\u9009\u62e9\u5668\u7684\u751f\u6548\u8303\u56f4\uff0c–bar\u7684\u4f5c\u7528\u57df\u662f.content\u9009\u62e9\u5668\u7684\u751f\u6548\u8303\u56f4\u3002<\/p>\n
\u7531\u4e8e\u8fd9\u4e2a\u539f\u56e0\uff0c\u5168\u5c40\u7684\u53d8\u91cf\u901a\u5e38\u653e\u5728\u6839\u5143\u7d20:root\u91cc\u9762\uff0c\u786e\u4fdd\u4efb\u4f55\u9009\u62e9\u5668\u90fd\u53ef\u4ee5\u8bfb\u53d6\u5b83\u4eec\u3002<\/p>\n
 <\/p>\n
:root {\r\n  --main-color: #06c;\r\n}\r\n\r\n<\/code><\/pre>\n
\u4e94\u3001\u54cd\u5e94\u5f0f\u5e03\u5c40<\/strong><\/h2>\n
CSS \u662f\u52a8\u6001\u7684\uff0c\u9875\u9762\u7684\u4efb\u4f55\u53d8\u5316\uff0c\u90fd\u4f1a\u5bfc\u81f4\u91c7\u7528\u7684\u89c4\u5219\u53d8\u5316\u3002<\/p>\n
\u5229\u7528\u8fd9\u4e2a\u7279\u70b9\uff0c\u53ef\u4ee5\u5728\u54cd\u5e94\u5f0f\u5e03\u5c40\u7684media\u547d\u4ee4\u91cc\u9762\u58f0\u660e\u53d8\u91cf\uff0c\u4f7f\u5f97\u4e0d\u540c\u7684\u5c4f\u5e55\u5bbd\u5ea6\u6709\u4e0d\u540c\u7684\u53d8\u91cf\u503c\u3002<\/p>\n
 <\/p>\n
body {\r\n  --primary: #7F583F;\r\n  --secondary: #F7EFD2;\r\n}\r\n\r\na {\r\n  color: var(--primary);\r\n  text-decoration-color: var(--secondary);\r\n}\r\n\r\n@media screen and (min-width: 768px) {\r\n  body {\r\n    --primary:  #F7EFD2;\r\n    --secondary: #7F583F;\r\n  }\r\n}\r\n<\/code><\/pre>\n
 <\/p>\n
\u516d\u3001\u517c\u5bb9\u6027\u5904\u7406<\/strong><\/h2>\n
\u5bf9\u4e8e\u4e0d\u652f\u6301 CSS \u53d8\u91cf\u7684\u6d4f\u89c8\u5668\uff0c\u53ef\u4ee5\u91c7\u7528\u4e0b\u9762\u7684\u5199\u6cd5\u3002<\/p>\n
 <\/p>\n
a {\r\n  color: #7F583F;\r\n  color: var(--primary);\r\n}\r\n\r\n<\/code><\/pre>\n
\u4e5f\u53ef\u4ee5\u4f7f\u7528@support\u547d\u4ee4\u8fdb\u884c\u68c0\u6d4b\u3002<\/p>\n
 <\/p>\n
@supports ( (--a: 0)) {\r\n  \/* supported *\/\r\n}\r\n\r\n@supports ( not (--a: 0)) {\r\n  \/* not supported *\/\r\n}\r\n<\/code><\/pre>\n
\u4e03\u3001JavaScript \u64cd\u4f5c<\/strong><\/h2>\n
JavaScript \u4e5f\u53ef\u4ee5\u68c0\u6d4b\u6d4f\u89c8\u5668\u662f\u5426\u652f\u6301 CSS \u53d8\u91cf\u3002<\/p>\n
const isSupported =  window.CSS &&  window.CSS.supports &&  window.CSS.supports('--a', 0);if (isSupported) {  \/* supported *\/} else {  \/* not supported *\/}\r\n\r\n<\/code><\/pre>\n
JavaScript \u64cd\u4f5c CSS \u53d8\u91cf\u7684\u5199\u6cd5\u5982\u4e0b\u3002<\/p>\n
 <\/p>\n
\/\/ \u8bbe\u7f6e\u53d8\u91cf\r\ndocument.body.style.setProperty('--primary', '#7F583F');\r\n\r\n\/\/ \u8bfb\u53d6\u53d8\u91cf\r\ndocument.body.style.getPropertyValue('--primary').trim();\r\n\/\/ '#7F583F'\r\n\r\n\/\/ \u5220\u9664\u53d8\u91cf\r\ndocument.body.style.removeProperty('--primary');\r\n\r\n<\/code><\/pre>\n
\u8fd9\u610f\u5473\u7740\uff0cJavaScript \u53ef\u4ee5\u5c06\u4efb\u610f\u503c\u5b58\u5165\u6837\u5f0f\u8868\u3002\u4e0b\u9762\u662f\u4e00\u4e2a\u76d1\u542c\u4e8b\u4ef6\u7684\u4f8b\u5b50\uff0c\u4e8b\u4ef6\u4fe1\u606f\u88ab\u5b58\u5165 CSS \u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
const docStyle = document.documentElement.style;\r\n\r\ndocument.addEventListener('mousemove', (e) => {\r\n  docStyle.setProperty('--mouse-x', e.clientX);\r\n  docStyle.setProperty('--mouse-y', e.clientY);\r\n});\r\n\r\n<\/code><\/pre>\n
\u90a3\u4e9b\u5bf9 CSS \u65e0\u7528\u7684\u4fe1\u606f\uff0c\u4e5f\u53ef\u4ee5\u653e\u5165 CSS \u53d8\u91cf\u3002<\/p>\n
 <\/p>\n
--foo: if(x > 5) this.width = 10;\r\n\r\n<\/code><\/pre>\n
\u4e0a\u9762\u4ee3\u7801\u4e2d\uff0c–foo\u7684\u503c\u5728 CSS \u91cc\u9762\u662f\u65e0\u6548\u8bed\u53e5\uff0c\u4f46\u662f\u53ef\u4ee5\u88ab JavaScript \u8bfb\u53d6\u3002\u8fd9\u610f\u5473\u7740\uff0c\u53ef\u4ee5\u628a\u6837\u5f0f\u8bbe\u7f6e\u5199\u5728 CSS \u53d8\u91cf\u4e2d\uff0c\u8ba9 JavaScript \u8bfb\u53d6\u3002<\/p>\n
\u6240\u4ee5\uff0cCSS \u53d8\u91cf\u63d0\u4f9b\u4e86 JavaScript \u4e0e CSS \u901a\u4fe1\u7684\u4e00\u79cd\u9014\u5f84\u3002<\/p>\n
\u516b\u3001\u6d4f\u89c8\u5668\u652f\u6301<\/h2>\n
\u76ee\u524d\uff0c\u5168\u7403\u7f51\u7ad9\u6d41\u91cf\u7684 77\uff05 \u652f\u6301CSS\u53d8\u91cf\uff0c\u800c\u7f8e\u56fd\u5df2\u7ecf\u63a5\u8fd190\uff05\u3002\u6211\u4eec\u5df2\u7ecf\u5728 Scrimba.com \u4e0a\u4f7f\u7528 CSS \u53d8\u91cf\uff0c\u56e0\u4e3a\u6211\u4eec\u7684\u5ba2\u6237\u5927\u591a\u4f7f\u7528\u73b0\u4ee3\u6d4f\u89c8\u5668\u3002<\/p>\n
\"\"\"20200427084200\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u5fae\u8f6f\u5ba3\u5e03 Edge \u6d4f\u89c8\u5668\u5c06\u652f\u6301 CSS \u53d8\u91cf\u3002\u8fd9\u4e2a\u91cd\u8981\u7684 CSS \u65b0\u529f\u80fd\uff0c\u6240\u6709\u4e3b\u8981\u6d4f\u89c8\u5668\u5df2\u7ecf\u90fd\u652f\u6301\u4e86\u3002\u672c\u6587 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[109,105],"tags":[142],"_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":1,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2924\/revisions"}],"predecessor-version":[{"id":2926,"href":"https:\/\/ai.zhousir.top\/index.php?rest_route=\/wp\/v2\/posts\/2924\/revisions\/2926"}],"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}]}}