问题描述
我必须以编程方式为div设置:before的宽度.
I somehow have to programmatically set the width of the :before for a div.
<div className="something" style={someStyle}> </div>
如何定义someStyle，以便.something``div的:before的宽度可以相应地更改??
How can I define the someStyle so that the width of the :before of .something``div can change accordingly??
推荐答案
伪元素不能使用内联样式设置样式，如 https中所述: //stackoverflow.com/a/14141821/368697 .您将必须使用.something:before选择器在样式表中设置something类名称的样式.这不是React的限制，而是HTML + CSS的设计选择.
Pseudo elements cannot be styled with inline styles as explained in https://stackoverflow.com/a/14141821/368697. You will have to style the something class name in a stylesheet with the .something:before selector. This is not a limitation of React but rather a design choice for HTML + CSS.
如果您需要以编程方式更改伪:before元素的宽度，则它可能更适合作为React渲染的常规DOM元素.
If you need to programmatically change the width of the pseudo :before element, it is probably more appropriate as a regular DOM element rendered by React.
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