SOURCE

<script src="https://cdn.jsdelivr.net/npm/vue@2/dist/vue.js"></script>
<div id="app">
    <input type="button" value="切换显示状态" @click="changeIsShow">
        
    </input>
    <input type="button" value="累加年龄" @click="addAge">
        
    </input>
    <img v-show="isShow"
    src="https://upload.wikimedia.org/wikipedia/commons/thumb/7/77/Google_Images_2015_logo.svg/1200px-Google_Images_2015_logo.svg.png">
    </img>
    <img v-show="age>=18"
    src ="https://storage.googleapis.com/gweb-uniblog-publish-prod/images/Chrome__logo.max-500x500.png">
    </img>

</div>

<script>
    var app = new Vue({
        el:"#app",
        data:{
            isShow:false,
            age:17
        },
        methods:{
            addAge:function(){
                this.age ++;


            },
            changeIsShow:function(){
                this.isShow=! this.isShow;
            }
        }
    })
</script>