Module import of non-JSX Javscript from .ts files fails

[adamcee]

Description

NOTE After completely rebuilding the project because of facebook/react-native#4968 I am now unable to reproduce this error.

Working on a simple test app, I found that I was getting errors and was unable to import anything from the following file/module when it was named async.ts, but that everything worked fine when it was named async.tsx.

I prefer to distinguish between files with or without JSX by using the appropriate file extension. It's not a big deal to have all files be .tsx, but if that is required it should be noted in the README. Otherwise this project has worked great so far - thank you for putting it together.

// async.tsx
// if something imported, fails if file is named async.ts

// simple async functions
export function getJSONResource(host: string, resourceName: string) {
    return getResource(host, resourceName)
        .then(response => response.json());
}

export function getResource(host: string, resourceName: string) {
    return fetch(`${host}/${resourceName}`)
        .then(handleErrors);
}

export function handleErrors(response: Response) {
    if(!response.ok) {
        throw Error(response.statusText);
    }
    return response;
}

1-2 sentences describing the problem you're having or the feature you'd like to request

Expected Behavior

I would have expected to be able to successfully import code from a file with a .ts extension, as long as no JSX syntax was used.

Observed Behavior

I was unable to import anything and received an error to that effect.

Environment

• npm ls react-native-scripts-ts: v1.11.4

• npm ls react-native: v0.52.0

• npm ls expo: v25.0.0

• node -v: 6.9.1

• npm -v: 5.7.1

• yarn --version: 0.27.5

• watchman version: 4.9.0

• Operating system: OS X Sierra 10.12.6

• Phone/emulator/simulator & version: Both with Expo and iOS Simulator v10.0