html5+css3制作音乐列表播放器，支持上一首或下一首音乐背景切换效果。mp3音乐赏赛车彩票平台app财富金女王官网下载播放器列表ui工具特效，---在线演示

// Designed by:  Mauricio Bucardo// Original image: https://dribbble.com/shots/6957353-Music-Player-Widget"use strict";// add elemntsconst bgBody = ["#e5e7e9", "#ff4545", "#f8ded3", "#ffc382", "#f5eda6", "#ffcbdc", "#dcf3f3"];const body = document.body;const player = document.querySelector(".player");const playerHeader = player.querySelector(".player__header");const playerControls = player.querySelector(".player__controls");const playerPlayList = player.querySelectorAll(".player__song");const playerSongs = player.querySelectorAll(".audio");const playButton = player.querySelector(".play");const nextButton = player.querySelector(".next");const backButton = player.querySelector(".back");const playlistButton = player.querySelector(".playlist");const slider = player.querySelector(".slider");const sliderContext = player.querySelector(".slider__context");const sliderName = sliderContext.querySelector(".slider__name");const sliderTitle = sliderContext.querySelector(".slider__title");const sliderContent = slider.querySelector(".slider__content");const sliderContentLength = playerPlayList.length - 1;const sliderWidth = 100;let left = 0;let count = 0;let song = playerSongs[count];let isPlay = false;const pauseIcon = playButton.querySelector("img[alt = 'pause-icon']");const playIcon = playButton.querySelector("img[alt = 'play-icon']");const progres = player.querySelector(".progres");const progresFilled = progres.querySelector(".progres__filled");let isMove = false;// creat functionsfunction openPlayer() {    playerHeader.classList.add("open-header");    playerControls.classList.add("move");    slider.classList.add("open-slider");    }function closePlayer() {    playerHeader.classList.remove("open-header");    playerControls.classList.remove("move");    slider.classList.remove("open-slider");    }function next() {        if (count == sliderContentLength) {        count = count;        return    }        left += sliderWidth;    left = Math.min(left, (sliderContentLength) * sliderWidth);    sliderContent.style.transform = `translate3d(-${left}%, 0, 0)`;    count++;    changeSliderContext();    changeBgBody();    selectSong();}function back() {        if (count == 0) {        count = count        return    }        left -= sliderWidth;    left = Math.max(0, left);    sliderContent.style.transform = `translate3d(-${left}%, 0, 0)`;    count--;}function changeSliderContext() {    sliderContext.style.animationName = "opacity";        sliderName.textContent = playerPlayList[count].querySelector(".player__title").textContent;    sliderTitle.textContent = playerPlayList[count].querySelector(".player__song-name").textContent;        if (sliderName.textContent.length > 16) {        const textWrap = document.createElement("span");        textWrap.className = "text-wrap";        textWrap.innerHTML = sliderName.textContent + "   " + sliderName.textContent;          sliderName.innerHTML = "";        sliderName.append(textWrap);            }    if (sliderTitle.textContent.length >= 18) {        const textWrap = document.createElement("span");        textWrap.className = "text-wrap";        textWrap.innerHTML = sliderTitle.textContent + "    " + sliderTitle.textContent;          sliderTitle.innerHTML = "";        sliderTitle.append(textWrap);    }}function changeBgBody() {    body.style.backgroundColor = bgBody[count];}function selectSong() {    song = playerSongs[count];    for (const item of playerSongs) {        if (item != song) {            item.pause();            item.currentTime = 0;        }    }    if (isPlay) song.play();        }function playSong() {       if (song.paused) {        song.play();        playIcon.style.display = "none";        pauseIcon.style.display = "block";    }else{        song.pause();        isPlay = false;        playIcon.style.display = "";        pauseIcon.style.display = "";    }    }function progresUpdate() {    const progresFilledWidth = (this.currentTime / this.duration) * 100 + "%";    progresFilled.style.width = progresFilledWidth;    if (this.duration == this.currentTime) {        next();    }    if (count == sliderContentLength && song.currentTime == song.duration) {        playIcon.style.display = "block";        pauseIcon.style.display = "";        isPlay = false;    }}function scurb(e) {    // If we use e.offsetX, we have trouble setting the song time, when the mousemove is running    const currentTime = ( (e.clientX - progres.getBoundingClientRect().left) / progres.offsetWidth ) * song.duration;    song.currentTime = currentTime;}function durationSongs() {    let min = parseInt(this.duration / 60);    if (min < 10) min = "0" + min;    let sec = parseInt(this.duration % 60);    if (sec < 10) sec = "0" + sec;        const playerSongTime = `${min}:${sec}`;    this.closest(".player__song").querySelector(".player__song-time").append(playerSongTime);}changeSliderContext();// add eventssliderContext.addEventListener("click", openPlayer);sliderContext.addEventListener("animationend", () => sliderContext.style.animationName ='');playlistButton.addEventListener("click", closePlayer);nextButton.addEventListener("click", next);backButton.addEventListener("click", () => {    back();    changeSliderContext();    changeBgBody();    selectSong();});playButton.addEventListener("click", () => {    isPlay = true;    playSong();});playerSongs.forEach(song => {    song.addEventListener("loadeddata" , durationSongs);    song.addEventListener("timeupdate" , progresUpdate);    });progres.addEventListener("mousedown", (e) => {    scurb(e);    isMove = true;    song.muted = true;});document.addEventListener("mousemove", (e) => isMove && scurb(e));document.addEventListener("mouseup", () => {    isMove = false    song.muted = false;});document.ondragstart = () => {  return false};