<p>我正在尝试在用户悬停在我的网站导航栏上时播放动画。我试图通过根据鼠标是否悬停在导航栏上来更改css模块来实现这一目标。我正在努力弄清楚为什么这段代码不起作用。非常感谢任何帮助！</p> <p>Navbar.jsx：</p> <pre class="brush:php;toolbar:false;">import React, { useState } from "react"; import { Link } from "react-router-dom"; import styles from "../styles/Navbar.module.css"; const Navbar = () => { const [className, setClassName] = useState("line-after"); return ( <div className="navbar" onMouseEnter={() => setClassName("line::before")} onMouseLeave={() => setClassName("line-after")} > <nav> <Link to="/about" className="home-page"> Bob <br /> Jones </Link> <ul> <li> <Link to="/about" className="about-page"> About </Link> </li> <li> <Link to="/resume" className="resume-page"> Resume </Link> </li> <li> <Link to="/contact" className="contact-page"> Contact </Link> </li> </ul> </nav> <div className={styles.className}></div> </div> ); }; export default Navbar;</pre> <p>Css模块：</p> <pre class="brush:php;toolbar:false;">.line::before { content: ""; position: absolute; top: 0; left: 0; width: 55px; height: 1px; background: black; animation-name: animate; animation-duration: 1s; } .line-after { margin: 40px 40px 40px 40px; width: 55px; height: 1px; background: white; position: relative; } @keyframes animate { 0% { left: 0; } 100% { left: 100%; } }</pre> <p>当鼠标离开和进入导航栏时，我正在更改className的状态。然而，它说我的状态变量className从未被使用过，所以我认为这是问题所在。不确定如何修复它。</p>