webpack --watch ignores certain files when ts-loader with transpileOnly is used

[ptkoz]

When using configuration mentioned in Faster Builds section of Readme.md (with fork-ts-checker-webpack-plugin and transpileOnly set to true), webpack is unable to watch .ts files those do not produce any .js output (e.g. with interface definition only).

Consider following fancy-interface.ts file:

export interface FancyInterface {
	test(): void;
}

If you run webpack --watch, modifications in this file are ignored, as webpack is not triggering rebuild. With transpileOnly: false everything works like expected.

I've made a small repo based on "fork-ts-checker" example to isolate the problem. Steps to reproduce:

1. git clone https://github.com/pamelus/ts-loader-transpileOnly-watch
2. cd ts-loader-transpileOnly-watch && npm install
3. npm run start
4. Make some changes in src/fancy-interface.ts. Observe that webpack is not triggering rebuild.

I don't know either it is intentional or not, but I think it deserves at least small mention in Readme.md. Or a fix.

Test case created using:

• [email protected]
• [email protected]
• [email protected]
• [email protected]

[johnnyreilly]

Yes - this is an issue with the fork checker, you can track it here: TypeStrong/fork-ts-checker-webpack-plugin#36

Agreed it would be good to mention it in the readme - if you'd like to submit a PR I'll take a look.

[johnnyreilly]

I've raised a docs PR for the fork checker here