父子组件间的数据传递

父子组件间的数据传递_ref的问题

来源：4-2 父子组件间的数据传递

目訫

2019-04-27

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <script src="vue_expansion.js"></script>
    <title>Props</title>
</head>
<body>
    <div id="app">
        <counter ref="one" :count="0"></counter>
        <counter ref="two" :count="1"></counter>
        <div>{{ total }}</div>
    </div>

    <script>
        var counter = {
            template: '<div @click="handleClick">{{ number }}</div>',
            props: ['count'],
            data () {
                return {
                    number: this.count
                }
            },
            methods: {
                handleClick () {
                    this.number++
                }
            }
        }
        var vm = new Vue({
            el: '#app',
            computed: {
                total () {
                    console.log(this.$refs.one)
                    // this.$refs.one.innerText + this.$refs.two.innerText
                }
            },
            components: {
                counter
            }
        })
    </script>
</body>
</html>

老师，为什么找不到ref

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1回答