我收到以下错误,但无法确定发生原因
warning.js:36警告:Searchbox正在将文本类型的受控输入更改为不受控制。输入元素不应从受控状态切换到非受控状态(反之亦然)。确定在组件的使用寿命中使用受控或非受控输入元素
我有以下文件:
Searchbox.js
import React, { Component } from 'react';
class Searchbox extends Component {
// render method
render() {
const { value, onChange, onSubmit, children } = this.props
console.log(value)
console.log(onChange)
console.log(onSubmit)
console.log(children)
return (
<section className="search-section">
<form onSubmit={onSubmit}>
<input
type="text"
className="search-box"
value={value}
onChange={onChange}
/>
<button type="submit">{children}</button>
</form>
</section>
)
}
}
export default Searchbox
和App.js文件
import React, { Component } from 'react';
import Searchbox from './components/Searchbox'
//import logo from './logo.svg';
import './App.css';
const DEFAULT_TERM = 'High Fidelity'
class App extends Component {
// Constructor
constructor(props) {
super(props)
this.state = {
movie: null,
searchTerm: DEFAULT_TERM
}
this.onSearchSubmit = this.onSearchSubmit.bind(this)
this.onSearchChange = this.onSearchChange.bind(this)
}
// onSearchSubmit method
onSearchSubmit(e) {
e.preventDefault()
console.log("Searching movie with name" + this.status.searchTerm)
}
onSearchChange(e){
console.log(event.target.value)
this.setState({ searchTerm: event.target.value })
}
// render method
render() {
const { movie, searchTerm } = this.state
return (
<div className="App">
<Searchbox
value={searchTerm}
onChange={this.onSearchChange}
onSubmit={this.onSearchSubmit}
>Search
</Searchbox>
</div>
);
}
}
export default App;
加载时一切正常,但是当我在文本字段中键入内容时,就会触发错误。
有什么建议?
最佳答案
问题出在onSearchChange函数中。您已将input的onChange事件命名为e,但您正在从全局变量事件中获取价值
将onSearchChange替换为以下代码:
onSearchChange(event) {
this.setState({ searchTerm: event.target.value })
}