Cannot use with --prod about ion-datepicker HOT 6 CLOSED

I tried just now and couldn't reproduce it in the demo project with --prod.
What version of ionic, ionic scripts & datepicker?

Also the error might indicate that you have an import that isnt found.
Maybe write the whole error?

from ion-datepicker.

the library versions are:
"@angular/core": "4.1.3",
"datepicker-ionic2": "2.5.1",
"ionic-angular": "3.6.0",
"@ionic/app-scripts": "2.1.4",
"ionic": "3.8.1",
"typescript": "2.3.4"

I think the libraries are up to date.

The error doesn't show much

ERROR Error: Uncaught (in promise): Error: No component factory found for undefined. Did you add it to @NgModule.entryComponents?
Error: No component factory found for undefined. Did you add it to @NgModule.entryComponents?
at K (main.js:1)
at e.resolveComponentFactory (main.js:1)
at e.resolveComponentFactory (main.js:1)
at e.resolveComponent (main.js:1)
at t._viewInit (main.js:1)
at main.js:1
at t.invoke (polyfills.js:3)
at Object.onInvoke (main.js:1)
at t.invoke (polyfills.js:3)
at r.run (polyfills.js:3)
at K (main.js:1)
at e.resolveComponentFactory (main.js:1)
at e.resolveComponentFactory (main.js:1)
at e.resolveComponent (main.js:1)
at t._viewInit (main.js:1)
at main.js:1
at t.invoke (polyfills.js:3)
at Object.onInvoke (main.js:1)
at t.invoke (polyfills.js:3)
at r.run (polyfills.js:3)
at c (polyfills.js:3)
at Object.reject (polyfills.js:3)
at t._fireError (main.js:1)
at t._failed (main.js:1)
at main.js:1
at t.invoke (polyfills.js:3)
at Object.onInvoke (main.js:1)
at t.invoke (polyfills.js:3)
at r.run (polyfills.js:3)
at polyfills.js:3

And the way I used it is:

import {DatePickerDirective} from 'datepicker-ionic2';

providers: [DatePickerDirective]

this.datePickerDirective.open();
this.datePickerDirective.changed.subscribe(date => {
        this.dateChanged(moment(date).valueOf())
    });

But even if I try the directive over a button, the same error appears.
For the development use, it work's fine. Maybe the production minification could scramble something?

from ion-datepicker.

I still didnt manage to replicate it, but one thing I can say for sure you shouldn't put DatePickerDirective into providers since its directive and not an injectable.

This is how I tried to recreate your code:

  @ViewChild(DatePickerDirective) public datepicker: DatePickerDirective;
  public ngOnInit() {
    this.datepicker.open();
    this.datepicker.changed.subscribe(() => console.log('change happened'));
  }

The only include you should have is the import in ngModule too.
No providers, nor entryComponents.

from ion-datepicker.

I tried with a new ionic2 project on a android device.

datePickerTest.zip

npm install
ionic cordova platform add android
ionic cordova run android --prod

from ion-datepicker.

I checked and it works fine.
Maybe npm i -g ionic@latest would help

from ion-datepicker.

I think actual there is an issue with the angular-cli uglify mechanism. If I use --aot it works great.

Thank you for your help. Awesome component BTW.

from ion-datepicker.