Vue学习--------------(2)计数器
写法一:
<!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>
</div>
<script src="../js/vue.js"></script>
<script>
const app=new Vue({
el : '#app', //用于挂载要管理的元素
data : { //定义数据
counter : 0
}
})
</script>
</body>
</html>
写法二:
<!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="add">+</button>
<button @click="sub">-</button> //@click="sub" 等同于 v-on:click="sub"
</div>
<script src="../js/vue.js"></script>
<script>
const app=new Vue({
el : '#app', //用于挂载要管理的元素
data : { //定义数据
counter : 0
},
methods : {
add : function () {
console.log('add被执行');
this.counter++
},
sub : function () {
console.log('sub被执行');
this.counter--
}
}
})
</script>
</body>
</html>
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