Vue之组件的生命周期

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<body>

    <div id="app">
        <button @click='isShow=!isShow'>改变组件的生死</button>
        <keep-alive> <!--此标签用于使里面的组件缓存起，因此避免销毁，创建的过程，若想看见创建和销毁的过程，去掉该标签即可-->
            <App v-if='isShow'/>
        </keep-alive>
    </div>

    <script src="../node_modules/vue/dist/vue.js"></script>
    <script>
        /* 组件的生命周期的图示链接：https://cn.vuejs.org/images/lifecycle.png
        以下是与组件生命周期相关的钩子函数
        - beforeCreate
        - created
        - beforeMount
        - mounted
        - beforeUpdate
        - updated
        - activated
        - deactivated
        - beforeDestory
        - destoryed
        */

        var App = {
            template: `<div>我是局部组件App
            <button @click='isShow=!isShow'>更新DOM</button>
            <p v-if='isShow'>我被改变了～</p>
            </div>`,
            data() {
                return {
                    msg:'hi',
                    isShow: false
                }
            },
            beforeCreate() {
                // 在组件创建前调用
                console.log('Before create, you can not get msg, msg is:', this.msg);
            },
            created() {
                // 在组件创建后调用
                console.log('After created, you can get msg, msg is:', this.msg)
            },
            beforeMount() {
                // 挂载数据到DOM前调用,此时还没有渲染局部组件里面的数据
                console.log(document.getElementById('app'));
            },
            mounted() {
                 // 挂载数据到DOM后调用，此时已经正常地渲染了局部组件
                 console.log(document.getElementById('app'));
            },
            beforeUpdate() {
                // 在更新DOM之前，调用此钩子函数，可以获取原始的DOM
                console.log('I am original DOM:',document.getElementById('app').innerHTML);
            },
            updated() {
                // 在更新DOM后调用此钩子函数，可以获取最新的DOM
                console.log('I am new DOM:',document.getElementById('app').innerHTML)
            },
            beforeDestroy(){
				console.log('beforeDestroy');
			},
			destroyed(){
				console.log('destroyed');
			},
			activated(){
				console.log('组件被激活了');
			},
			deactivated(){
				console.log('组件被停用了');
			}
        };

        new Vue({
            el: '#app',
            template: ``,
            data() {
                return {
                    isShow: false
                }
            },
            components: {
                App
            }
        });
    </script>
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