Is this a bug report?

Yes

Can you also reproduce the problem with npm 4.x?

Yes

Which terms did you search for in User Guide?

I search for different combinations of keywords describing using react-scripts-ts for app with both tsx and jsx modules

Environment

1. npm ls react-scripts-ts (if you haven’t ejected): react-scripts-ts@2.6.0
2. node -v: v8.2.1
3. npm -v: 5.3.0
4. yarn --version (if you use Yarn): 0.27.5
   <<<<<<< HEAD
5. npm ls react-scripts (if you haven’t ejected):
   =======
6. npm ls react-scripts-ts (if you haven’t ejected):

Fix Code Review

Then, specify:

1. Operating system: Win7 SP1 x64
2. Browser and version (if relevant): Chrome 60

Steps to Reproduce

I have application with mixed js(x) and ts(x) modules, which I need to coexist and compile properly, however when I rename any of tsx modules to js or jsx, I get the build error:

1. create-react-app my-app
2. rename src/App.tsx => src/App.jsx
3. npm run build

Expected Behavior

Successfully compiled build/dist

Actual Behavior

Actual results:

./src/App.jsx
Module parse failed: c:\temp\test-react-typescript\src\App.jsx Unexpected token (9:6)
You may need an appropriate loader to handle this file type.
|   render() {
|     return (
|       <div className="App">
|         <div className="App-header">
|           <img src={logo} className="App-logo" alt="logo" />

Reproducible Demo

Please just follow steps, it's very easy to reproduce.