Vue组件中的父子传值

<!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">
    <title>Document</title>
    <script src="vue-2.4.0.js"></script>
</head>

<body>

    <div id="app">
        <login v-bind:parentmsg="msg" @func='getmsgFromSon'></login>
    </div>

    <template id="temp">
        <div>
            <h1>这是组件的模板----{{ parentmsg }}</h1>

            <!-- 子组件通过事件绑定机制向父组件传递消息 -->
            <input type="button" value="向父组件传递消息" @click='sendMes'>
        </div>
    </template>

    <script>
        var login = {
            template: '#temp',
            data() {
                return {
                    msg: "这是子组件中的值，儿子已经长大了，该给爸爸1000元钱了"
                }
            },
            methods: {
                sendMes() {
                    this.$emit('func',this.msg)
                }
            },
            props: ['parentmsg']
        }

        var vm = new Vue({
            el: '#app',
            data: {
                msg: '这是父组件中的值，爸爸有100块钱，儿子你要不？',
                msgFromSon: ''
            },
            methods: {
                getmsgFromSon(data) {
                    this.msgFromSon = data
                    console.log(this.msgFromSon)
                }
            },
            components: {
                login
            }

        });
    </script>
</body>

</html>
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