修改元素：在React中以编程方式在CSS规则之前

修改元素：在React中以编程方式在CSS规则之前

您可以重复

document.styleSheets

设置

.style

的

.cssRules

地方

.selectorText

比赛伪选择

let sheets = document.styleSheets;let selector = "div::before";let replacementContent = '"after"';for (let sheet of sheets) {  for (let rule of sheet.cssRules) {    if (rule.selectorText === selector) {      rule.style["content"] = replacementContent;    }  }}div:before {  content: "before";  color: red;  font-weight: bold;  text-align: center;  text-shadow: 2px 2px 2px #000;  background: green;  width: 50px;  height: 50px;  display: block;}<div></div>