React 为子组件添加两个父组件
React Adding two parents for a child component
State是存储子组件所有状态的智能组件
import React from 'react';
import TextArea from './Components/TextArea';
class State extends React.Component {
constructor(props) {
super(props);
this.state = {
name: ''
}
this.myChangeHandler = this.myChangeHandler.bind(this)
}
myChangeHandler = (event) => {
event.preventDefault();
this.setState({
[event.target.name]:event.target.value
});
}
render() {
return (
<div>
{/* Change code below this line */}
<TextArea name = {this.state.name}
myChangeHandler = {this.myChangeHandler}/>
{/* Change code above this line */}
</div>
);
}
};
export default State;
现在TextArea是共享输入值到状态的子组件。
import React from 'react';
import '../style.css';
class TextArea extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<input type="text" onChange= {this.props.myChangeHandler} name="name" value={this.props.name}></input>
<h1>Hello, my name is:{this.props.name} </h1>
</div>
);
}
};
export default TextArea;
有几个子组件将数据发送到状态组件。
所以应用程序组件用于订购子组件。
我的一个子组件需要两个父组件。请看图enter image description here
import React from 'react';
import { BrowserRouter, Route } from 'react-router-dom'
import './App.css';
import TextArea from './Components/TextArea'
function App() {
return (
<div className="App">
<BrowserRouter>
<Route path = "/new" component= {TextArea} />
</BrowserRouter>
</div>
);
}
export default App;
State是存储子组件所有状态的智能组件
import React from 'react';
import TextArea from './Components/TextArea';
class State extends React.Component {
constructor(props) {
super(props);
this.state = {
name: ''
}
this.myChangeHandler = this.myChangeHandler.bind(this)
}
myChangeHandler = (event) => {
event.preventDefault();
this.setState({
[event.target.name]:event.target.value
});
}
render() {
return (
<div>
{/* Change code below this line */}
<TextArea name = {this.state.name}
myChangeHandler = {this.myChangeHandler}/>
{/* Change code above this line */}
</div>
);
}
};
export default State;
现在TextArea是共享输入值到状态的子组件。
import React from 'react';
import '../style.css';
class TextArea extends React.Component {
constructor(props) {
super(props);
}
render() {
return (
<div>
<input type="text" onChange= {this.props.myChangeHandler} name="name" value={this.props.name}></input>
<h1>Hello, my name is:{this.props.name} </h1>
</div>
);
}
};
export default TextArea;
有几个子组件将数据发送到状态组件。 所以应用程序组件用于订购子组件。
我的一个子组件需要两个父组件。请看图enter image description here
import React from 'react';
import { BrowserRouter, Route } from 'react-router-dom'
import './App.css';
import TextArea from './Components/TextArea'
function App() {
return (
<div className="App">
<BrowserRouter>
<Route path = "/new" component= {TextArea} />
</BrowserRouter>
</div>
);
}
export default App;