Function expressions are not supported in decorators

angular heroku

In my case error was caused by:

export const listAnimation = ()...

instead of:

export function listAnimation()...

angular heroku

As your error says, you need to export the function. Decorators don't accept function calls into their properties.

You can find more information on this github issue : https://github.com/angular/angular/issues/15587

angular heroku

You need to refactor code like this:

{  provide: APP_INITIALIZER,  useFactory: loadStuff,  deps: [InitRolesService],  multi: true}

and then export function

export function loadStuff(service: InitService) {   return () => service.load().subscribe(data => { ... }));}

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