React React, Webpack & Typescript installation My First Component
Example
import React, { Component } from 'react';
import ReactDOM from 'react-dom';
interface AppProps {
name: string;
}
interface AppState {
words: string[];
}
class App extends Component<AppProps, AppState> {
constructor() {
super();
this.state = {
words: ['foo', 'bar']
};
}
render() {
const { name } = this.props;
return (<h1>Hello {name}!</h1>);
}
}
const root = document.getElementById('root');
ReactDOM.render(<App name="Foo Bar" />, root);
When using TypeScript with React, once you've downloaded the React DefinitelyTyped type definitions (npm install --save @types/react), every component will require you to add type annotations.
You do this like so:
class App extends Component<AppProps, AppState> { }
where AppProps and AppState are interfaces (or type aliases) for your components' props and state respectively.
