javascript - 如何在 hr :after in javascript? 上设置数据内容

Question

<分区>

Answer 1

您可以通过元素属性间接执行此操作:

CSS

p#my-id::after {
    // set content to be the value of an attribute on the element p
    content: attr(data-value);
}

JS

const element = document.getElementById('my-id');
element.setAttribute('data-value', 'myRuntimeValue');