Vue生命周期实例分析总结

<div id="app">
    <input type="text" v-model="username">
</div>
<script>
    const vm = new Vue({
        el: '#app',
        data: {
            username: ''
        },
        // 初始化阶段生命周期  -- 它只都只执行1次
        beforeCreate() {
            console.log('beforeCreate');
        },
        created() {
            console.log('created');
        },
        beforeMount() {
            console.log('beforeMount');
        },
        mounted() {
            console.log('mounted');
            setTimeout(() => {
                // 销毁
                this.$destroy()
            }, 2000);
            this.timer = setInterval(() => {
                console.log(111);
            }, 1000);
        },
        // 更新阶段生命周期，它们会执行N次
        beforeUpdate() {
            console.log('beforeUpdate');
        },
        updated() {
            console.log('updated');
        },
        // 销毁阶段  只执行1次
        beforeDestroy() {
            clearInterval(this.timer)
            console.log('beforeDestroy');
        },
        destroyed() {
            console.log('destroyed');
        }
    })
</script>