vue十四

<div id="app14">
        <button @click="num = num+1">++</button>
        <span>{{ num }}</span>
    </div>
    <script>
        const app14=new Vue({
            el:'#app14',
            data:{
                num:0
            },
            beforeCreate(){
                console.log('beforecreate 创建阶段前,script数据尚未加载')
            },
            created(){
                console.log('created 创建阶段已完成')
            },
            beforeMount(){
                console.log('beforeMount,挂载阶段前，开始通过数据进行页面渲染')
            },
            mounted(){
                console.log('mounted 挂载阶段完毕')
            },
            beforeUpdate(){
                console.log('beforeUpdate 每次修改会经历本阶段，本阶段数据已经修改画面尚未渲染')
            },
            updated(){
                console.log('updated 每次修改会经历本阶段，本阶段数据已经修改画面也渲染完成')
            },
            beforeDestroy(){
                console.log('beforeDestroy Vue开始销毁')
            },
            destroyed(){
                console.log('destroyed Vue销毁完毕')
            }
        })
    </script>

    <div id="app15">
        <ul>
            <li v-for="(item , index) in news" :key="item.id" >
            {{ item.title }}
            <img alt="img" :src="item.img">
            </li>
        </ul>
    </div>
    <script>