怎么办React重置刷新组件

Posted 2021-04-28

我想重置以刷新输入的状态。我在网上测试了13：this.messageForm.reset()但我得到的错误并不是一个功能

import React, {Component} from 'react'
import {Form, Button} from 'reactstrap'


export default class Formulaire extends Component {

createMessage = event => {
    event.preventDefault()
    console.log(this.message.value)
    const message = this.message.value
    this.props.addMessage(message)
    //reset
    this.messageForm.reset()
}
render() {
    return (
        <div>
            <Form 
                className='form' 
                onSubmit={event =>this.createMessage(event)}
                ref={input => this.messageForm = input}
                >
                <textarea 
                    required 
                    maxLength='140'
                    ref={input => this.message = input}
                >

                </textarea>
                <Button type="submit"> Envoyer! </Button>
            </Form>
        </div>

    )
}
}

答案

问题是你的<Form>不是html表单元素，而是reactstrap Form component，因此，它没有.reset()方法。

Reactstrap允许设置innerRef prop来访问实际的DOM元素：

<Form 
  className='form' 
  onSubmit={event =>this.createMessage(event)}
  innerRef={input => this.messageForm = input}
>