:has - CSS（层叠样式表）编辑

:has() CSS 伪类代表一个元素，其给定的选择器参数（相对于该元素的 :scope）至少匹配一个元素。

:has() 伪类接受一个选择器组作为参数。在当前规范中 :has 并未列为实时选择器配置的一部分，意味着其不能用于样式表中，只能用于如 document.querySelector() 的函数中。

/* 选择任何直接包含 <img> 子元素的 <a>  */
/* 注意，目前还没有任何浏览器支持此方法 */
/* 此伪类也未计划投入样式表中使用 */
var test = document.querySelector('a:has(> img)');

语法

:has( <relative-selector-list> )where 
<relative-selector-list> = <relative-selector>#
where 
<relative-selector> = <combinator>? <complex-selector>
where 
<combinator> = '>' | '+' | '~' | [ '||' ]
<complex-selector> = <compound-selector> [ <combinator>? <compound-selector> ]*
where 
<compound-selector> = [ <type-selector>? <subclass-selector>* [ <pseudo-element-selector> <pseudo-class-selector>* ]* ]!
where 
<type-selector> = <wq-name> | <ns-prefix>? '*'
<subclass-selector> = <id-selector> | <class-selector> | <attribute-selector> | <pseudo-class-selector>
<pseudo-element-selector> = ':' <pseudo-class-selector>
<pseudo-class-selector> = ':' <ident-token> | ':' <function-token> <any-value> ')'
where 
<wq-name> = <ns-prefix>? <ident-token>
<ns-prefix> = [ <ident-token> | '*' ]?  | 
<id-selector> = <hash-token>
<class-selector> = '.' <ident-token>
<attribute-selector> = '[' <wq-name> ']' | '[' <wq-name> <attr-matcher> [ <string-token> | <ident-token> ] <attr-modifier>? ']'
where 
<attr-matcher> = [ '~' |  |  | '^' | '$' | '*' ]? '='
<attr-modifier> = i | s