将onMouseEnter和onMouseLeave事件添加到音乐播放器

问题描述

我正在编写一个音乐播放器应用程序，但遇到了麻烦。 我正在尝试一种方法：

?当我将鼠标悬停在歌曲上时，它会在歌曲编号的位置显示一个“播放”按钮。

?当前播放的歌曲显示“暂停”按钮代替歌曲编号。

?暂停的歌曲将显示“播放”按钮来代替歌曲编号。

我想在此方法中使用onMouseEnter和onMouseLeave事件，但我不知道从哪里开始

这是我的相册组件

import React, { Component } from 'react';
import albumData from './../data/albums';

class Album extends Component {
    constructor(props) {
          super(props);

        const album = albumData.find( album => {
          return album.slug === this.props.match.params.slug
        });

        this.state = {
          album: album,
            currentSong: album.songs[0],
            isPlaying: false
        };

        this.audioElement = document.createElement('audio');
        this.audioElement.src = album.songs[0].audioSrc;
        }

        play() {
              this.audioElement.play();
              this.setState({ isPlaying: true });
            }

        pause() {
              this.audioElement.pause();
              this.setState({ isPlaying: false });
            }   

        setSong(song) {
              this.audioElement.src = song.audioSrc;
              this.setState({ currentSong: song });
            }

        handleSongClick(song) {
              const isSameSong = this.state.currentSong === song;
              if (this.state.isPlaying && isSameSong) {
                   this.pause();
                 } else {
                   if (!isSameSong) { this.setSong(song); }     
                   this.play();
                 }  
            }



    render() {
      return (
         <section className="album">
            <section id="album-info">
                 <img id="album-cover-art" src={this.state.album.albumCover} alt={this.state.album.title}/>
                 <div className="album-details">
                 <h1 id="album-title">{this.state.album.title}</h1>
                 <h2 className="artist">{this.state.album.artist}</h2>
                 <div id="release-info">{this.state.album.releaseInfo}</div>
              </div>
            </section>
            <table id="song-list">
                <colgroup>
                    <col id="song-number-column" />
                    <col id="song-title-column" />
                    <col id="song-duration-column" />
                </colgroup>  
                <tbody>
                {this.state.album.songs.map( (song, index) =>
                    <tr className="song" key={index} onClick={() => this.handleSongClick(song)} >
                          <td className="song-actions">
                             <button>
                                <span className="song-number">{index+1}</span>
                                <span className="ion-play"></span>
                                <span className="ion-pause"></span>
                            </button>
                          </td>
                          <td className="song-title">{song.title}</td>
                          <td className="song-duration">{song.duration}</td>
                    </tr>
                  )}
                </tbody>
            </table>
         </section>
      );
    }
 }


export default Album;