vue 之 this.$watch 随时监听随时取消~

<script>
	export default {
		data(){
			return {
				onOff:false
			}
		}
		mounted(){
			this.$watch('onOff',(n,o)=>{
				console.log(onOff);
				this.onOff = !this.onOff
				// 滑稽
			},{
				immediate:true,
			})

			// this.$watch(变量, function(n,o){}, { 高端操作 })
		}
	}
</script>