1、自定义事件
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<p>总数：{{total}}</p>
<!--自定义事件-->
<my-component @increase='handleGetTotal' @reduce='handleGetTotal'></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component('my-component', {
//下面两种都是处理为多行字符串
// template: '
// <div>
// <button @click="handleIncrease">+1</button>
// <button @click="handleReduce">-1</button>
// </div>',
template: `
<div>
<button @click="handleIncrease">+1</button>
<button @click="handleReduce">-1</button>
</div>`,
data: function() {
return {
counter: 0
}
},
methods: {
handleIncrease: function() {
this.counter++;
this.$emit('increase', this.counter)
},
handleReduce: function() {
this.counter--;
this.$emit('reduce', this.counter)
}
}
})
new Vue({
el: "#app",
data: {
total: 0
},
methods: {
handleGetTotal: function(total) {
this.total = total;
}
}
})
</script>
</body>
</html>
2、v-model
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8" />
<title>Vue</title>
</head>
<body>
<div id="app">
<p>总数：{{total}}</p>
<my-component v-model='total'></my-component>
</div>
<script src="https://cdn.bootcss.com/vue/2.5.9/vue.min.js"></script>
<script type="text/javascript">
Vue.component('my-component', {
template: `<button @click="handleClick">+1</button>`,
data: function() {
return {
counter: 0
}
},
methods: {
handleClick: function() {
this.counter++;
this.$emit('input', this.counter)
}
}
})
new Vue({
el: "#app",
data: {
total: 0
}
})
</script>
</body>
</html>