本文主要介紹了原生JS實現音樂播放器的示例代碼，分享給大家，具體如下:

按照播放器的功能劃分，對播放器的屬性和DOM元素歸類，實現同一功能的元素和屬性保存在同一對象中，便于管理和操作

const control = { //存放播放器控制 play: document.querySelector(’#myplay’), ... index: 2,//當前播放歌曲序號 ...}const audioFile = { //存放歌曲文件及相關信息 file: document.getElementsByTagName(’audio’)[0], currentTime: 0, duration: 0,}const lyric = { // 歌詞顯示欄配置 ele: null, totalLyricRows: 0, currentRows: 0, rowsHeight: 0,}const modeControl = { //播放模式 mode: [’順序’, ’隨機’, ’單曲’], index: 0}const songInfo = { // 存放歌曲信息的DOM容器 name: document.querySelector(’.song-name’), ...}播放控制

功能：控制音樂的播放和暫停，上一首，下一首，播放完成及相應圖標修改audio所用API：audio.play() 和 audio.pause()和audio ended事件

// 音樂的播放和暫停，上一首，下一首控制control.play.addEventListener(’click’,()=>{ control.isPlay = !control.isPlay; playerHandle();} );control.prev.addEventListener(’click’, prevHandle);control.next.addEventListener(’click’, nextHandle);audioFile.file.addEventListener(’ended’, nextHandle);function playerHandle() { const play = control.play; control.isPlay ? audioFile.file.play() : audioFile.file.pause(); if (control.isPlay) { //音樂播放，更改圖標及開啟播放動畫 play.classList.remove(’songStop’); play.classList.add(’songStart’); control.albumCover.classList.add(’albumRotate’); control.albumCover.style.animationPlayState = ’running’; } else { //音樂暫停，更改圖標及暫停播放動畫 ... }}function prevHandle() { // 根據播放模式重新加載歌曲 const modeIndex = modeControl.index; const songListLens = songList.length; if (modeIndex == 0) {//順序播放 let index = --control.index; index == -1 ? (index = songListLens - 1) : index; control.index = index % songListLens; } else if (modeIndex == 1) {//隨機播放 const randomNum = Math.random() * (songListLens - 1); control.index = Math.round(randomNum); } else if (modeIndex == 2) {//單曲 } reload(songList);}function nextHandle() { const modeIndex = modeControl.index; const songListLens = songList.length; if (modeIndex == 0) {//順序播放 control.index = ++control.index % songListLens; } else if (modeIndex == 1) {//隨機播放 const randomNum = Math.random() * (songListLens - 1); control.index = Math.round(randomNum); } else if (modeIndex == 2) {//單曲 } reload(songList);}播放進度條控制

功能：實時更新播放進度，點擊進度條調整歌曲播放進度audio所用API：audio timeupdate事件，audio.currentTime

// 播放進度實時更新audioFile.file.addEventListener(’timeupdate’, lyricAndProgressMove);// 通過拖拽調整進度control.progressDot.addEventListener(’click’, adjustProgressByDrag);// 通過點擊調整進度control.progressWrap.addEventListener(’click’, adjustProgressByClick);

播放進度實時更新：通過修改相應DOM元素的位置或者寬度進行修改

function lyricAndProgressMove() { const audio = audioFile.file; const controlIndex = control.index; // 歌曲信息初始化 const songLyricItem = document.getElementsByClassName(’song-lyric-item’); if (songLyricItem.length == 0) return; let currentTime = audioFile.currentTime = Math.round(audio.currentTime); let duration = audioFile.duration = Math.round(audio.duration); //進度條移動 const progressWrapWidth = control.progressWrap.offsetWidth; const currentBarPOS = currentTime / duration * 100; control.progressBar.style.width = `${currentBarPOS.toFixed(2)}%`; const currentDotPOS = Math.round(currentTime / duration * progressWrapWidth); control.progressDot.style.left = `${currentDotPOS}px`; songInfo.currentTimeSpan.innerText = formatTime(currentTime);}

拖拽調整進度：通過拖拽移動進度條，并且同步更新歌曲播放進度

function adjustProgressByDrag() { const fragBox = control.progressDot; const progressWrap = control.progressWrap drag(fragBox, progressWrap)}function drag(fragBox, wrap) { const wrapWidth = wrap.offsetWidth; const wrapLeft = getOffsetLeft(wrap); function dragMove(e) { let disX = e.pageX - wrapLeft; changeProgressBarPos(disX, wrapWidth) } fragBox.addEventListener(’mousedown’, () => { //拖拽操作 //點擊放大方便操作 fragBox.style.width = `14px`;fragBox.style.height = `14px`;fragBox.style.top = `-7px`; document.addEventListener(’mousemove’, dragMove); document.addEventListener(’mouseup’, () => { document.removeEventListener(’mousemove’, dragMove); fragBox.style.width = `10px`;fragBox.style.height = `10px`;fragBox.style.top = `-4px`; }) });}function changeProgressBarPos(disX, wrapWidth) { //進度條狀態更新 const audio = audioFile.file const duration = audioFile.duration let dotPos let barPos if (disX < 0) { dotPos = -4 barPos = 0 audio.currentTime = 0 } else if (disX > 0 && disX < wrapWidth) { dotPos = disX barPos = 100 * (disX / wrapWidth) audio.currentTime = duration * (disX / wrapWidth) } else { dotPos = wrapWidth - 4 barPos = 100 audio.currentTime = duration } control.progressDot.style.left = `${dotPos}px` control.progressBar.style.width = `${barPos}%`}

點擊進度條調整：通過點擊進度條，并且同步更新歌曲播放進度

function adjustProgressByClick(e) { const wrap = control.progressWrap; const wrapWidth = wrap.offsetWidth; const wrapLeft = getOffsetLeft(wrap); const disX = e.pageX - wrapLeft; changeProgressBarPos(disX, wrapWidth)}歌詞顯示及高亮

功能：根據播放進度，實時更新歌詞顯示，并高亮當前歌詞（通過添加樣式）audio所用API：audio timeupdate事件，audio.currentTime

// 歌詞顯示實時更新audioFile.file.addEventListener(’timeupdate’, lyricAndProgressMove);function lyricAndProgressMove() { const audio = audioFile.file; const controlIndex = control.index; const songLyricItem = document.getElementsByClassName(’song-lyric-item’); if (songLyricItem.length == 0) return; let currentTime = audioFile.currentTime = Math.round(audio.currentTime); let duration = audioFile.duration = Math.round(audio.duration); let totalLyricRows = lyric.totalLyricRows = songLyricItem.length; let LyricEle = lyric.ele = songLyricItem[0]; let rowsHeight = lyric.rowsHeight = LyricEle && LyricEle.offsetHeight; //歌詞移動 lrcs[controlIndex].lyric.forEach((item, index) => { if (currentTime === item.time) { lyric.currentRows = index; songLyricItem[index].classList.add(’song-lyric-item-active’); index > 0 && songLyricItem[index - 1].classList.remove(’song-lyric-item-active’); if (index > 5 && index < totalLyricRows - 5) {songInfo.lyricWrap.scrollTo(0, `${rowsHeight * (index - 5)}`) } } })}播放模式設置

功能：點擊跳轉播放模式，并修改相應圖標audio所用API：無

// 播放模式設置control.mode.addEventListener(’click’, changePlayMode);function changePlayMode() { modeControl.index = ++modeControl.index % 3; const mode = control.mode; modeControl.index === 0 ? mode.setAttribute('class', 'playerIcon songCycleOrder') : modeControl.index === 1 ? mode.setAttribute('class', 'playerIcon songCycleRandom ') : mode.setAttribute('class', 'playerIcon songCycleOnly')}

項目預覽

代碼地址：https://github.com/hcm083214/audio-player

到此這篇關于原生JS實現音樂播放器的示例代碼的文章就介紹到這了,更多相關JS 音樂播放器內容請搜索好吧啦網以前的文章或繼續瀏覽下面的相關文章希望大家以后多多支持好吧啦網！