<template>
    <div>
        <input v-model="form.name" />
        <span>{{form.code}}</span>
        <input v-model="form.old" />
    </div>
</template>
<script>
export default {
    data() {
        return {
            form: {
                name: '张三',
                code: '0001'
            }
        }
    },
    watch: {
        ['form.name']() {
            console.log(this.form)
        },
        ['form.old']() {
            console.log(this.form)
        }
    },
    mounted() {
        this.form.old = 12
    },
    methods: {
        oldInput(value) {
            this.form.old = value
        }
    }
}
</script>