英文:
How do I make :before render in the DOM?
问题
I can't figure out how to make :before render in the DOM.
我不知道如何在 DOM 中呈现 :before。
I tried this:
我尝试了以下代码：
const inline = {backgroundColor: "yellow",width: "100px",height: "30px",display: "inline-block",position: "relative","&::before": {content: '"Good Day"',position: "absolute",left: "-50px",top: "50px",},}return (<p style={style}>Lorem ipsum dolor sit amet, <i style={inline}></i>consecteturadipiscing elit, sed do<i style={inline}></i> eiusmod temporincididunt ut labore et dolore magna aliqua.<i style={inline}></i></p>)
the styling of the i elements works as expected, except for the :before that is not rendered.
i 元素的样式按预期工作，除了 :before 不会被呈现。
Any tip on how t accomplish this would be much appreciated 🙌
对于如何实现这一点的任何提示将不胜感激 🙌
英文:
I can't figure out how to make :before render in the DOM.
I tried this:
const inline = {backgroundColor: "yellow",width: "100px",height: "30px",display: "inline-block",position: "relative","&::before": {content: '"Good Day"',position: "absolute",left: "-50px",top: "50px",},}return (<p style={style}>Lorem ipsum dolor sit amet, <i style={inline}></i>consecteturadipiscing elit, sed do<i style={inline}></i> eiusmod temporincididunt ut labore et dolore magna aliqua.<i style={inline}></i></p>)
the styling of the i elements works as expected, except for the :before that is not rendered.
Any tip on how t accomplish this would be much appreciated 🙌
答案1
得分: 1
const inline = { /* ... */"&::before": { /* ... */ },}
The ampersand ("parent selector") is a part of SCSS/SASS/LESS, not the raw CSS properties that React can understand.
There is no syntax that allows ":before" applied as an inline style, as in this SO answer, nor through JavaScript manipulation as in this SO answer.
英文:
const inline = { /* ... */"&::before": { /* ... */ },}
The ampersand ("parent selector") is a part of SCSS/SASS/LESS, not the raw CSS properties that React can understand.
There is no syntax that allows ":before" applied as an inline style, as in this SO answer, nor through JavaScript manipulation as in this SO answer.
答案2
得分: 1
内联CSS样式不支持伪元素（它们不是元素本身的一部分）。唯一将样式应用于伪元素的方法是使用CSS声明（例如：设置一个id并设置带有#id::before{ }的CSS声明）。
对于ReactJS组件，一种选项是使用类似于:before（或:after）伪元素的显式标签，将其添加到元素内容的开头或末尾。例如：
const inline = {backgroundColor: "yellow",width: "100px",height: "30px",display: "inline-block",position: "relative",}const before = {position: "absolute",left: "-50px",top: "50px",}return (<p style={style}>Lorem ipsum dolor sit amet, <i style={inline}></i>consecteturadipiscing elit, sed do<i style={inline}></i> eiusmod temporincididunt ut labore et dolore magna aliqua.<i style={inline}><div style={before}>"Good Day"</div>Content</i></p>)
英文:
Inline css styles do not support pseudo elements (they are not part of the element itself). The only way to apply style to pseudo elements is using css declarations (eg: setting an id and setup a css declaration with #id::before{ }).
One option for reactjs components is to use an explicit tag that works like :before (or :after) pseudo element, adding it to the start or end of the element content. Eg:
const inline = {backgroundColor: "yellow",width: "100px",height: "30px",display: "inline-block",position: "relative",}const before = {position: "absolute",left: "-50px",top: "50px",}return (<p style={style}>Lorem ipsum dolor sit amet, <i style={inline}></i>consecteturadipiscing elit, sed do<i style={inline}></i> eiusmod temporincididunt ut labore et dolore magna aliqua.<i style={inline}><div style={before}>"Good Day"</div>Content</i></p>)
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