- communicate with components - data transfer subassembly parent component - use custom events

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<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>
</head>

<body>

    <div id="app">

        <child1-component @call="onCall"></child1-component>
    </div>

    <script src="./vue.js"></script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                name: '苑文浩',
            },
            methods: {
                // 事件的处理函数,可以用来接收子组件通过 $emit() 方法传入的数据
                onCall(childMsg) {
                    console.log(childMsg)
                }
            },
            components: {
                'child1-component': {
                    data() {
                        return {
                            child1Message: 'child1组件的数据'
                        }
                    },
                    methods: {
                        send() {
                            // 使用 $emit() 方法手动触发当前组件上注册的自定义事件,并给事件的处理函数传递数据
                            this.$emit('call', this.child1Message)

                            // $emit() 方法类似于 jQuery 中的 trigger(),可以用来手动触发事件
                        }
                    },
                    template: `<div><button type="button" @click="send">为父组件传递数据</button></div>`
                }
            }
        });

        // props properties 属性
        // ref   reference  引用
    </script>
</body>

</html>
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Origin blog.csdn.net/qq_45802159/article/details/103818305