如何使用css-in-js在悬停另一个元素时显示div元素？

Question

我正在尝试仅在悬停到特殊div时显示一些信息。我使用material ui和他们的withStyles组件。有没有办法做到这一点？

Answer 1

请检查此示例：

import React, {useState} from "react";

export default function ShowButtonHover() {
    const [style, setStyle] = useState({display: 'none'});

    return (
        <div className="App">
            <h2>Hidden message in the box. Move mouse in the box</h2>
            <div style={{border: '1px solid gray', width: 300, height: 300, padding: 10, margin: 100}}
                 onMouseEnter={e => {
                     setStyle({display: 'block'});
                 }}
                 onMouseLeave={e => {
                     setStyle({display: 'none'})
                 }}
            >
                <div style={style}>This was hidden</div>
            </div>
        </div>
    );
}