React JS切换/在悬停时添加一个类

Question

我正在使用带有React的animate.css库，并试图在悬停时设置一个元素（按钮）。试图通过文档和这里查看，但无法找到实现这个简单任务的方法。如果有人已经实现了这个或发现参考将非常感激

class App extends Component {

   constructor(props) {
    super(props);

    this.handleHover = this.handleHover.bind(this);
  }

  handleHover(){
    this.setState({
        isHovered: !this.state.isHovered
    });
  }

  render() {
    const btnClass = this.state.isHovered ? "pulse animated" : "";

    return (
      <div>
        <button className={btnClass} onMouseEnter={this.state.handleHover} onMouseLeave={this.state.handleHover}>Test</button>
      </div>
    );
  }
}

export default App;

Answer 1

您可以在组件上使用onMouseEnter和onMouseLeave事件，并相应地切换类。

constructor(){
    super();
    this.state = {
        isHovered: false
    };
    this.handleHover = this.handleHover.bind(this);
}
handleHover(){
    this.setState(prevState => ({
        isHovered: !prevState.isHovered
    }));
}
render(){
    const btnClass = this.state.isHovered ? "pulse animated" : "";
    return <button className={btnClass} onMouseEnter={this.handleHover} onMouseLeave={this.handleHover}></button>
}

更新05/07/19：Hooks

import React, { useState } from 'react';

export default function Component () {
  const [hovered, setHovered] = useState(false);
  const toggleHover = () => setHovered(!hovered);
  return (
    <button 
      className={hovered ? 'pulse animated' : ''}
      onMouseEnter={toggleHover}
      onMouseLeave={toggleHover}
    >
    </button>
  )
}