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CSS

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HTML 

              
                <div id="vueApp">
  <player></player>
  <credits></credits>
</div>

<script type="x-template/script" id="player">
  <div class="player">
    <current-song></current-song>
    <playlist :playlist-items="playlistItems"></playlist>
    <new-playlist-item
      :playlist-items="playlistItems"
    ></new-playlist-item>
  </div>
</script>


<script type="x-template/script" id="playlist">
  <div class="playlist u-mb">
    
    <div v-if="playlistItems.length > 0">
      <div v-for="playlistItem in playlistItems" :key="playlistItem.id" class="playlist__item">
        <div class="u-pull-l">
          <playlist-item :song="playlistItem"></playlist-item>
        </div>
        <div class="u-pull-r">
          <button-play :song="playlistItem"></button-play>
        </div>
        <br class="u-clear-both">
      </div>
    </div>
    <div v-if="playlistItems.length == 0" class="u-p u-text-center">
      <h2>Playlist</h2>
      <p>No songs! Go ahead, add one!</p>
    </div>
  </div>
</script>


<script type="x-template/script" id="playlist-item">
  <transition name="bounce">
    <div v-if="showSong">
        <span class="artist">
          {{song.artist}}
        </span>
        <span class="title">
          {{song.title}}
        </span>        
    </div>
  </transition>
</script>


<script type="x-template/script" id="new-playlist-item">
  <div class="new-item">
    <div class="u-bg-error" v-if="errorMsg">
      <p class="u-p u-color-white u-text-bold u-text-center" >{{errorMsg}}</p>
    </div>
  
    <form @submit.prevent="addSong()">
      <input autocomplete="off" type="text" v-model="artist" placeholder="Artist" name="artist">
      <input autocomplete="off" type="text" v-model="title" placeholder="Title of the song" name="title">
      <button type="submit">Add song to playlist</button>
    </form>
  </div>
</script>


<script type="x-template/script" id="current-song">
  <transition name="bounce">
    <div class="current-song u-mb" v-show="currentSong">
      <div class="player__icons u-pull-l u-text-center">
        <button-stop></button-stop>
      </div>
      <div class="playlist__item__wrapper u-pull-l u-text-center">
        <div class="playlist__item">
          <playlist-item type="current-song" :song="currentSong"></playlist-item>
        </div>
      </div>
      <span class="u-clear-both"></span>
      <player-status></player-status>
    </div>
  </transition>
</script>


<script type="x-template/script" id="button-stop">
  <div class="o-button">
    <a class="u-color-white" @click="stopSong">&#9608;</a>
  </div>
</script>


<script type="x-template/script" id="button-play">
  <div class="o-button">
    <a class="o-button--rounded o-button--primary" @click="playSong">&#9658;</a>
  </div>
</script>


<script type="x-template/script" id="player-status">
  <div class="player__status-bar" :style="barStyle">{{currentSong}}</div>
</script>

<script type="x-template/script" id="credits">
  <div class="credits u-p u-color--white u-text-center">
    Made for <a target="_blank" href="https://www.meetup.com/VueJSMeetupAmsterdam/events/242082860/">Vue Meetup Amsterdam</a> with &hearts; by 
    <a target="_blank" :href="twitter">{{name}}</a>
  </div>
</script>
!

CSS 

              
                $color-primary: #43C6AC; //#ba0b38
$color-secondairy: #191654; //3841a3

$default-padding: 20px;
$default-margin: 20px;
$default-gradient: linear-gradient(211deg, $color-primary, $color-secondairy);
$error-gradient: linear-gradient(211deg, #EA384D, #D31027);
$default-border-color: #DEDEDE;


* {
  font-family: 'Roboto', 'Verdana', sans-serif;
  font-weight: 200;
  font-size: 14px;
}

body {
  background: #1b2b34;
}

h2 {
  padding: 0px;
  margin: 0px;
  font-size: 24px;
}

p {
  padding: 0px;
  margin: 0px;
}

button,
input {
  padding: 20px;
  outline: 0;
}

input {
  width: calc( 100% - 42px );
  border: 1px solid #FFF;
  margin-bottom: 20px;
  border-radius: 2px;
  margin: 0;
  border-bottom: 1px solid $default-border-color;
  -webkit-appearance: none;
}

button {
  width: 100%;
  background: $default-gradient;
  border: 0;
  color: #FFF;
  font-size: 16px;
  border-radius: 2px;
}

// ------ Utilities ------

.u-pull-l {
  float: left;
}

.u-pull-r {
  float: right;
}

.u-mb {
  margin-bottom: $default-margin;
}

.u-p {
 padding: $default-padding; 
}

.u-p-t {
  padding-top: $default-padding;
}

.u-p-b {
  padding-bottom: $default-padding;
}

.u-p-l {
  padding-left: $default-padding;
}

.u-p-r {
  padding-right: $default-padding;
}

.u-clear-both {
  display: block;
  content: '';
  clear: both;
}

.u-color-red {
  color: red;
}

.u-color-white {
  color: #FFF;
}

.u-text-bold {
  font-weight: 300;
}

.u-text-center {
  text-align: center;
}

.u-bg-error {
  background: $error-gradient;
}

.o-button--primary {
  display: block;
  background: $default-gradient;
  padding: 10px;
  color: #FFF;
  width: 25px;
  height: 25px;
  line-height: 25px;
  text-align: center;
}

.o-button--rounded {
  border-radius: 5px;
}


// ------ Components ------

// Player component

.player {
  position: relative;
  background: #EEE;
  width: calc( 100% - 40px );
  max-width: 400px;
  padding: 20px;
  border-radius: 5px;
  margin: 0 auto;
  
  .current-song {
    
    .playlist__item__wrapper {
      width: calc( 100% - 50px );
    
      .playlist__item {
        width: calc( 100% - 100px );
        height: 50px;
        padding: 50px;
        border-radius: 10px;
        background: transparent !important;
        border-bottom: 0 !important;

        > span {
          position: relative;
          display: block;
          top: 50%;
          transform: translateY(-50%);
        }
        span.artist {
          font-size: 16px;
        } 
        span.title {
          font-size: 20px;
        }
      }
    }
  }
  
}

//Playlist component
  
.playlist {
  border-radius: 4px;
  background: #FFF;
}

// Playlist item component

.playlist__item {
  background: #FFF;
  padding: 20px;
  border-top: 1px solid $default-border-color;

  span {
    display: block;
  }

  span.artist {
    font-size: 13px;
    color: #888;
  }

  span.title {
    font-size: 15px;
  }

  &:first-child {
    border-top: 0;
  }

  &:last-child {
    border-bottom: 1px solid $default-border-color;
  }

  &:nth-child(odd) {
    background: #f5f5f5;
  }
}

// New song component

.new-item {
  background: #DEDEDE;
  border-radius: 4px;
}

// Current song component

.current-song {
  background: #DDD;
  border-radius: 4px;
  overflow: hidden;

  .player__icons {
    width: 50px;
    height: 150px;
    background: $default-gradient;
    box-shadow: 29px 24px 96px 0px #929292;

    .o-button {
      position: relative;
      display: block;
      top: 50%;
      transform: translateY(-50%);
    }
  }
}

// Player status

.player__status-bar {
  width: 0;
  overflow: hidden;
  height: 3px;
  background: $default-gradient;
  transition-duration: 1s;
  transition-timing-function: ease;
  transition-property: width;
  margin: 0 auto;
}

// Credits 

.credits {
  color: #FFF;
  a {
    color: #FFF;
  }
}

/**
 * Vue Transition
 * @doc More information: https://vuejs.org/v2/guide/transitions.html
 */

.bounce-enter-active {
  animation: bounce-in .5s;
}
.bounce-leave-active {
  animation: bounce-in .5s reverse;
}
@keyframes bounce-in {
  0% {
    transform: scale(0);
  }
  50% {
    transform: scale(1.05);
  }
  100% {
    transform: scale(1);
  }
}
!

JS 

              
                const state = {
  currentSong: null
}

const mutations = {
 SET_CURRENT_SONG( state, payload ) {
   state.currentSong = payload
 } 
}

const actions = {
 playSong( {commit}, song ) {
   commit('SET_CURRENT_SONG', song)
 },
 stopSong( {commit} ){
   commit('SET_CURRENT_SONG', null )
 }
}

const store = new Vuex.Store({
  state,
  actions,
  mutations
})


Vue.component('player', {
  template: '#player',
  data() {
    return {
      playlistItems: []
    }
  }
})

Vue.component('playlist', {
  template: '#playlist',
  props: {
    playlistItems: {
      required: true,
      type: Array
    }
  }
})

Vue.component('playlist-item', {
  template: '#playlist-item',
  props: {
    song: {
      required: false
    }
  },
  computed: {
    showSong() {
      return typeof this.song == 'object' && 
        this.song.artist !== undefined && 
        this.song.title !== undefined
    }
  }
})

Vue.component('new-playlist-item', {
  template: '#new-playlist-item',
  props: {
    playlistItems: {
      type: Array,
      required: true
    }
  },
  data() {
    return {
      artist: '',
      title: '',
      errorMsg: ''
    }
  },
  methods: {
    addSong() {
      
      let { artist, title } = this
      
      if ( this.artist.length > 0 && this.title.length > 0 ) {
        
        this.playlistItems.push({
          artist,
          title
        })

        this.clearForm()
        
      } else {
        this.errorMsg = 'You did not fill in all the required fields'
      }
    },
    clearForm() {
      this.artist = ''
      this.title = ''
      this.errorMsg = ''
    }
  }
})

Vue.component('current-song', {
  template: '#current-song'
})


Vue.component('credits', {
  template: '#credits',
  data() {
    return {
      name: 'Sybren Dotinga',
      twitter: 'https://twitter.com/sybrendotinga'
    }
  }
})


Vue.component('button-play', {
  template: '#button-play',
  props: {
    song: {
      required: true
    }
  },
  methods: {
    playSong(){
      this.$store.dispatch('playSong', this.song)
    }
  }
})


Vue.component('button-stop', {
  template: '#button-stop',
  methods: {
    stopSong() {      
      this.$store.dispatch('stopSong', '')
    }
  }
})


Vue.component('player-status', {
  template: '#player-status',
  data() {
    return {
      status: 0,
      intervalId: null
    }
  },
  computed: {
    barStyle() {
      return {
        width: this.status + '%'
      }
    },
    currentSong() {
      let song = this.$store.state.currentSong
      if ( song && this.intervalId === null ) {
        this.startPlaying()
      }
      if ( !song ) {
        this.stopPlaying()
      }
      return song
    },
    songPlaying() {
      return typeof this.currentSong === 'object'
    }
  },
  methods: {
    startPlaying() {
      let that = this;
      that.intervalId = setInterval( () => {
        if ( that.status < 100 ) {
          that.status++
        } else {
          that.stopPlaying()
        }
      }, 1000)
    },
    stopPlaying() {
      this.status = 0
      clearInterval( this.intervalId )
      this.intervalId = null
    }
  }
})


const vue = new Vue({
  el: '#vueApp', 
  store
})
!
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