<div class="container center" id="app">
  <div class="center padding-4">
    <h2 class="title">{{message}}</h2>
    <div id="timer2" v-html="time"></div>
    <div class="buttons">
      <button @click="timerRun" v-if="!timerRunning">Start</button>
      <button @click="timerPause" v-if="timerRunning">Pause</button>
      <button @click="timerReset" v-if="timerRunning">Restart</button>
    </div>
  </div>
</div>
.container {
    width: 100%;
    background-image: linear-gradient(141deg,#04a6d7 0,#209cee 71%,#3287f5 100%);
    min-height: 100vh;
    color: #ffffff;
}

.padding-4 {
  padding: 40px;
}
.center {
    -webkit-box-align: center;
    -ms-flex-align: center;
    align-items: center;
    display: -webkit-box;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-orient: vertical;
    -webkit-box-direction: normal;
    -ms-flex-direction: column;
    flex-direction: column;
    -webkit-box-pack: justify;
    -ms-flex-pack: justify;
    justify-content: space-between;
}

#timer,
#timer2{
    font-size: 200px;
    line-height: 1;
    margin-bottom: 40px;
}
.title {
    text-align: center;
    font-size: 1.4em;
}
.buttons {
    text-align: center;
}

.buttons button {
    background-color: #363636;
    color: #f5f5f5;
    border: none;
    padding:12px;
}


// new Vue({
//   el: "#app",
//   data: {
   
//   },
//   computed: {
//     time: function() {
//       return this.hours + ":" + this.minutes;
//     },
//     hours: function() {
//       var hrs = Math.floor((1000 / 60 / 60));
//       return hrs >= 10 ? hrs : '0' + hrs;
//     },
//     minutes: function() {
//       var min = Math.floor((1000 / 60) % 60);
//       return min >= 10 ? min : '0' + min;
//     }
//   }
// });
View Compiled
new Vue({
  el: '#app',
  data: {
    message: 'Let the countdown begin!!',
    totalTime: (25 * 60),
    timerRunning: false,
    timerPaused: false,
    interval: null
  },
  computed: {
     time: function() {
      return this.minutes + " : " + this.seconds;
    },
    minutes: function() {
      var min = Math.floor(this.totalTime / 60);
      return min >= 10 ? min : '0' + min;
    },
    seconds: function() {
      var sec = this.totalTime - (this.minutes * 60);
      return sec >= 10 ? sec : '0' + sec;
    }
  },
  methods: {
    timerRun() {
      this.timerRunning = true;
      this.message = 'Greatness is within sight!!!';
      this.interval = setInterval(this.countdownTimer, 1000);
      console.log(this.totalTime);
    },
    timerPause() {
      this.message = 'Never quit, keep going!!';
      this.timerRunning = false;
      clearInterval(this.interval);
    },
    timerReset() {
      this.message = 'Let the countdown begin!!';
      this.timerRunning = false;
      clearInterval( () => { this.interval; });
      this.totalTime = (25 * 60);
    },
    timerCountdown() {
      console.log('Working');
      this.timerRunning = true;
      this.interval = setInterval(this.updateCurrentTime, 1000);
      // Counts down from 60 seconds times 1000.
      setInterval( () => {
        this.timerMinutes--
      }, 60 * 1000)
      
      // Check if seconds at double zero and then make it a 59 to countdown from.
      // need another method of checking the number while in the loop and then adding a zero on the number under 10
      if(this.timerSeconds === '00'){
        this.timerSeconds = 59;
        setInterval( () => {
          this.timerSeconds--
        }, 1000);
      } else {
        setInterval( () => {
          this.timerSeconds--
        }, 1000);
      }
    },
    countdownTimer() {
      if (this.timerRunning == true) {
          this.totalTime--;
      }
    }
  }
})
Rerun