Now we want to change a variable value inside a media query. Tip:Media Queries are about defining different style rules for different devices (screens, tablets, mobile phones, etc.). You can learn more Media Queries in ourMedia Queries Chapter. ...
以下的CSS就无法运行: :root{--top-border: border-top;/* Can't set a property as custom property's value */var(--top-border):10pxsolid#bc84d8;/* Can't use a variable as a property */} 你也不能把属性-值对存储为一个变量,然后重用它。下面的例子也是无效的: :root{--text-color:'c...
We provide a larger CSS variable feature subset thanpostcss-custom-properties. Related links and issues: -var declared in media query should pull in properties that use/reference that varoncssnext/cssnext-Investigate support for media-query scoped propertiesonpostcss/postcss-custom-properties-remove:roo...
与media query(媒体查询)类似,feature query(特性查询)也是一种条件样式,仅在支持特定样式规则的环境应用指定的一组样式: The @supports CSS at-rule lets you specify declarations that depend on a browser’s support for one or more specific CSS features. This is called a feature query. 1. 2. 等等,...
Web developers can utilize browser-defined environment variables to get the geometry of the display region (or regions) on and calculate the geometry of the obscured hinge area (if present). The properties of each viewport can be queried with the following environment variable definitions (using th...
:root{--top-border:border-top;/* Can't set a property as custom property's value */var(--top-border):10px solid #bc84d8;/* Can't use a variable as a property */} 你也不能把属性-值对存储为一个变量,然后重用它。下面的例子也是无效的: ...
今年的CSS Day一共有14个关于CSS方面的话题,其中有几个话题是非常有意思的,比如 Lea Verou 的《CSS Variable Secrets》、Bramus Van Damme的《The CSS Cascade, a deep dive》、Adam Argyle的《Oh Snap!》和 Michelle Barker 的《Creative CSS Layout》。就我个人而言,Michelle Barker 的《Creative CSS Layout》...
Like with normal CSS, child elements inherit the CSS variable values of their parent elements (as long as the parent value is not overwritten in the child element). Consider the following example: Because we assigned the--main-text-colorvalue to the first div, both its childandelements inside...
Theastvariable will have the following payload: [ { inverse:false, type:'screen', expressions:[ { modifier:'min', feature:'width', value:'48em' } ] } ] This package was written with care to following the W3C Recommendations forCSS3 Media QueriesandCSS3 Values and Units. It supports al...
Why not set a variable in a media query and express the other values as calculations over it? Presumably they're not completely random numbers, but there is some logic to them. Why not make it obvious? It’s a good option that will work for some layouts, not for others. There’s not...