app that uses isDevMode() api, cuases an error when built or served in prod mode

[forforeach]

OS?

Windows 10

Versions.

angular-cli: 1.0.0-beta.22-1
node: 6.5.0
os: win32 x64

Repro steps.

1. Create an app using CLI
2. Add reference to isDevMode
3. Use isDevMode()
4. Serve or build an app with --prod flag

if (isDevMode()) {
  console.log('devmode');
}
@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    HttpModule
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

The log given by the failure.

Uncaught Error: Cannot enable prod mode after platform setup.
@ application_ref.js:43367
@ main.ts:9r
@ bootstrap 521fad9…:52690
@ main.cd1f6e0….bundle.js:222r
@ bootstrap 521fad9…:52window.webpackJsonp
@ bootstrap 521fad9…:23(anonymous function)
@ main.cd1f6e0….bundle.js:1

---

[nweldev]

I didn't investigated that enough for now, but I could reproduce it, and it seems to be an angular/angular issues. I'll search any existing issue about that and investigate more as soon as I could.

[nweldev]

Found it : angular/angular#10643
It's still in progress, so we could remove the enableProdMode in environment.prod.ts by default in the meantime ... Anyone have an idea about that ?

Edit : from angular/angular#12200 : "the setting has to agree what was used in the compiler setting, otherwise Angular does not work." - maybe there is something to investigate in that field ...

[clydin]

This is expected behavior. You can't use isDevMode before enableProdMode.

[martinmcwhorter]

Shouldn't you check the environment provider rather than call isDevMode()?

[filipesilva]

As @clydin said, you can't use isDevMove before enableProdMode. It might seem that it isn't happening in that order, but remember that you're calling the AppModule import before the code in main.ts runs.

There might be something to angular/angular#12200, but this will probably be an API change that we'll implement when available.

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