As the name noop
("no operation") says, that module doesn't do anything. It is a utility module that mocks the real animation module but doesn't actually animate.
This can be handy on platforms where animation would be too slow, or for testing (unit, integration, e2e with Cypress, Protractor, ...) , if animation isn't involved in what you actually want to test.
@NgModule({
imports: [
BrowserModule,
environment.production ? BrowserAnimationsModule : NoopAnimationsModule,
...
]
...
}
export class AppModule {}
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