How to implement reusable component input in vue 3?

Question

could anyone can give me a hint about reusable component input in vue 3? Like this in React:

Let say,

1. use <Input /> reusable component in parent component

import { useState } from 'react';
import Input from './component/Input';

function Home() {
  const [email, setEmail] = useState('');
  const [password, setPassword] = useState('');

  const handleSubmit = (e) => {
    e.preventDefault();
    
    console.log(email, password);
  }

  return (
    <form onSubmit={handleSubmit}>
      <Input id="email" labelText="Email" value={email} onChange={e => setEmail(e.target.value)} />
      <Input id="password" labelText="Password" value={password} onChange={e => setPassword(e.target.value)} />
      <button type="submit">Login</button>
    </form>
  );
}

2. here <Input /> component:

export default function Input(props) {
  const { id, labelText, value, onChange } = props;

  return (
    <label htmlFor={id}>{labelText}<label>
    <input id={id} value={value} onChange={onChange}>
  );
}

Answer 1

You should read up on Component Basics from the Vue 3 docs .

Key concepts:

• Use the v-bind directive (or : prefix for shorthand) for data binding
• Use the v-on directive (or @ prefix for shorthand) for event handlers
• Use double curly brackets for string interpolation of data properties
• Use the v-model directive for two-way data binding
• Use props option to declare properties
• Use ref to create data properties using Composition API

The equivalent input component in Vue 3:

<template>
  <label :for="id">{{ labelText }}</label>
  <input
    :value="modelValue"
    @change="$emit('update:modelValue', $event.target.value)"
    :id="id"
  />
</template>

<script>
export default {
  props: {
    id: String,
    labelText: String,
    modelValue: String,
  },
};
</script>

And the form:

<template>
  <form @submit="handleSubmit">
    <MyInput id="email" labelText="Email" v-model="email" />
    <MyInput id="password" labelText="Password" v-model="password" />
    <button type="submit">Login</button>
  </form>
</template>

<script>
import MyInput from "@/components/MyInput.vue";
import { ref } from "vue";

export default {
  components: {
    MyInput,
  },
  setup() {
    const email = ref("");
    const password = ref("");

    return {
      email,
      password,
      handleSubmit(e) {
        e.preventDefault()
        console.log("submit", email.value, password.value);
      },
    };
  },
};
</script>

demo