TypeScript and ReactDOM.render method doesn't accept component

Question

TL;DR

I'm using TypeScript and React. I've defined my AppContainer.tsx component, exported it as default. I'm consuming this in the file app.ts where ReactDOM lives to render it to the targetted dom element. But there I receive the following errors (see image). Read below for more information and links to GitHub repo.

Question: What am I doing, or interpreting, wrong? From all code examples I've seen this should work - but maybe (clearly) I'm missing something. Below is more info and links to the full GitHub repo.

---

Environment

• react 15.4.2
• react-dom 15.4.2
• typings: https://github.com/aredfox/electron-starter/blob/master/typings.json
• tsconfig: https://github.com/aredfox/electron-starter/blob/master/tsconfig.json

Code

File '/components/AppContainer.tsx'

/// <reference path="../../../typings/index.d.ts" />

// Top level application component

/*------------------------------------------------------------------------------------*/
/** IMPORTS **/
import * as React from 'react';
import { Component } from 'react';
/*------------------------------------------------------------------------------------*/
/*///*/

/*------------------------------------------------------------------------------------*/
/** COMPONENT **/
export default class AppContainer extends React.Component<{}, {}> {    
    render() {
        return ( <div /> );
    }    
}        
/*------------------------------------------------------------------------------------*/
/*///*/

https://github.com/aredfox/electron-starter/blob/master/src/views/components/AppContainer.tsx

File 'app.ts'

/// <reference path="../../typings/index.d.ts" />
/// <reference path="interfaces.d.ts" />

// Setting up react inside the host html

/*------------------------------------------------------------------------------------*/
/** IMPORTS **/
import * as React from 'react';
import * as ReactDOM from 'react-dom';
// Components
import AppContainer from './components/AppContainer';
/*------------------------------------------------------------------------------------*/
/*///*/

/*------------------------------------------------------------------------------------*/
/** RENDER TO DOM **/
ReactDOM.render(
    <AppContainer/>,
    document.getElementById('AppContainer')
);
/*------------------------------------------------------------------------------------*/
/*///*/

https://github.com/aredfox/electron-starter/blob/master/src/views/app.ts

Quick Links

• Git repo: https://github.com/aredfox/electron-starter
  • app.ts file https://github.com/aredfox/electron-starter/blob/master/src/views/app.ts
  • AppContainer.tsx file https://github.com/aredfox/electron-starter/blob/master/src/views/components/AppContainer.tsx

Pavier

Answer 1

You can't use jsx/tsx syntax inside files which have ts extension.

You can either rename your file to app.tsx, or you can use React.createElement:

ReactDOM.render(
    React.createElement(AppContainer),
    document.getElementById('AppContainer')
);

Amphitrite

To add to this... tsx is compiled to jsx, then to js, whereas .ts are compiled to .js. Your tsconfig.json should also have a property "jsx": "react". – Festivity

Thanks A LOT! This was indeed what I was looking for.. How on earth could I overlook this... – Pavier

I spent 2h figuring out this. Thanks a lot! – Manumit