webpack-dev-server live-reload and error overlay does not work with 3.0.2 but did in 3.0.0-beta.14

[jonaskello]

I upgraded today from 3.0.0-beta.14 to 3.0.2 and noticed that the overlay feature in webpack-dev-server stopped working. Not sure why, I'm guessing it has something to do with webpack-dev-server not being able to determine that atl fails. I'm using webpack 2.2.1 and webpack-dev-server 2.3.0. Let me know if example code to repro the issue is needed.

[jonaskello]

Another related observation is that with live-reload enabled in webpack-dev-server it will now reload even when atl fails with errors. In beta14 it would not reload but just report the errors in the console. Probably the root cause is the same as for the error overlay not working.

[s-panferov]

@jonaskello the main reason of this behavior is that error reporting is async in the 3x version. "async" means that webpack don't wait for the atl to mark build VALID and make HMR. It speeds up development print-eval cycle.

You can work-around this behavior by disabling CheckerPlugin or make the loader silent

[jonaskello]

Aha, that makes sense now. Thanks!