count timer in vue js code example
Example 1: vue js count down timer
<template>
{{ timerCount }}
</template>
<script>
export default {
data() {
return {
timerEnabled: true,
timerCount: 30
}
},
watch: {
timerEnabled(value) {
if (value) {
setTimeout(() => {
this.timerCount--;
}, 1000);
}
},
timerCount: {
handler(value) {
if (value > 0 && this.timerEnabled) {
setTimeout(() => {
this.timerCount--;
}, 1000);
}
},
immediate: true
}
}
methods: {
play() {
this.timerEnabled = true;
},
pause() {
this.timerEnabled = false;
}
}
}
</script>
Example 2: vue js count down timer
<template>
<div>
<slot :hour="hour" :min="min" :sec="sec"></slot>
</div>
</template>
<script>
export default {
props : {
endDate : {
type : Date,
default(){
return new Date()
}
},
negative : {
type : Boolean,
default : false
}
},
data(){
return{
now : new Date(),
timer : null
}
},
computed:{
hour(){
let h = Math.trunc((this.endDate - this.now) / 1000 / 3600);
return h>9?h:'0'+h;
},
min(){
let m = Math.trunc((this.endDate - this.now) / 1000 / 60) % 60;
return m>9?m:'0'+m;
},
sec(){
let s = Math.trunc((this.endDate - this.now)/1000) % 60
return s>9?s:'0'+s;
}
},
watch : {
endDate : {
immediate : true,
handler(newVal){
if(this.timer){
clearInterval(this.timer)
}
this.timer = setInterval(()=>{
this.now = new Date()
if(this.negative)
return
if(this.now > newVal){
this.now = newVal
this.$emit('endTime')
clearInterval(this.timer)
}
}, 1000)
}
}
},
beforeDestroy(){
clearInterval(this.timer)
}
}
</script>