<!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>
</head>

<body>
    <div id="app">
        <cpn :number1="num1" :number2="num2" @num1change="num1change" @num2change="num2change"></cpn>

    </div>
    <template id="cpn">
        <div>
            <h2>props:{{number1}}</h2>
            <h2>data:{{dnumber1}}</h2>
            <input type="text" v-bind:value="dnumber1" @input="numInput1">
            <h2>props:{{number2}}</h2>
            <h2>data:{{dnumber2}}</h2>
            <input type="text" v-bind:value="dnumber2" @input="numInput2">
        </div>
    </template>

    <script src="./js/vue.js">
    </script>
    <script>
        const app = new Vue({
            el: '#app',
            data: {
                num1: 1,
                num2: 0
            },
            methods: {
                num1change(value) {
                    this.num1 = parseFloat(value)
                },
                num2change(value) {
                    this.num2 = parseFloat(value)
                }
            },
            components: {
                'cpn': {
                    template: '#cpn',

                    props: {
                        number1: Number,
                        number2: Number,
                    },
                    data() {
                        return {
                            dnumber1: this.number1,
                            dnumber2: this.number2,
                        }
                    },
                    methods: {
                        numInput1(event) {
                            this.dnumber1 = event.target.value
                            this.$emit('num1change', this.dnumber1)
                            this.dnumber2 = this.dnumber1 * 100
                            this.$emit('num2change', this.dnumber2)
                        },
                        numInput2(event) {
                            this.dnumber2 = event.target.value
                            this.$emit('num2change', this.dnumber2)
                            this.dnumber1 = this.dnumber2 / 100
                            this.$emit('num1change', this.dnumber1)
                        },
                    }
                }
            },

        })
    </script>
</body>

</html>

运行结果