Vue案例之计数器_Vue案例之计数器

Vue案例之计数器_vue_02

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>

<div id="app">
        <h2>当前计数：{{counter}}</h2>
        <!--
        <button v-on:click="counter++">+</button>
        <button v-on:click="counter--">-</button>
        -->
        <button v-on:click="add">+</button>
        <!--v-on还可以这样用@表示    -->
        <button @click="sub">-</button>
</div>

<script src="../js/vue.js"></script>
<script>

    const obj = {
        counter: 0,
    }
    const app = new Vue({
        el: '#app',
        data: obj,
        methods: {
            add: function () {
                console.log('add被执行');
                this.counter++
            },
            sub: function () {
                console.log('sub被执行');
                this.counter--
            }
        },
        beforeCreate: function () {

        },
        created: function () {
            console.log('created');
        },
        mounted: function () {
            console.log('mounted');
        }
    })

    //1.拿到button元素

    //2.添加监听事件
</script>
</body>
</html>

Vue案例之计数器_html_03