::grammar-error
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
::grammar-error 伪元素应用于浏览器标识为语法错误的文本段
只有一小部分的 css 能够应用在::grammar-error 的选择器中
colorbackground-colorcursortext-emphasis-colortext-shadowoutlineand its longhandstext-decorationand its associated properties