为什么material-UI textField返回“无效的挂钩调用"错误 [英] why material-UI textField returns 'Invalid hook call' error
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问题描述
我正在尝试从Material-UI创建一个文本字段,以更新类组件中的状态.发生错误,并返回无效的挂接调用"错误. Material-UI是否必须始终与React Hooks一起使用,还是可以不与它一起使用?
I'm trying to create a textfield from Material-UI that update state in a class component. Something is wrong and it returns 'invalid hook call' error. Must Material-UI be always used with React Hooks or could it be used without?
import React, { Component } from "react";
import ReactDOM from "react-dom";
import TextField from "@material-ui/core/TextField";
class App extends Component {
constructor(props) {
super(props);
this.state = {
year: null,
otherAttributes: null
};
this.handleChangefor = this.handleChangefor.bind(this);
}
handleChangefor = (propertyName) => (event) => {
this.setState({
...this.state,
[propertyName]: event.target.value
})
}
render() {
return (
<div>
<TextField
id="outlined-name"
label="year"
value={this.state.year}
onChange={this.handleChangefor('year')}
margin="normal"
variant="outlined"
/>
</div>
);
}
}
const rootElement = document.getElementById("root");
ReactDOM.render(<App />, rootElement);
还可以在在线编辑器中的此处中找到该代码.谢谢.
The code can also be found here in online editor. Thanks.
推荐答案
首先,将您的React版本从16.8.0
更新为16.8.6
.
First, update your react version from 16.8.0
to 16.8.6
.
然后,TextField
value
属性不能为null
,请将您的初始状态更改为:
Then, TextField
value
property can't be null
, change your initial state to:
this.state = {
year: "",
otherAttributes: null
};
除了您的代码可以正常工作.
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