Facebook Callback appends '#_=_' to Return URL

Question

Facebook callback has started appending #_=_ hash underscore to the Return URL

Does anyone know why? What is the solution?

Answer 1

Using Angular 2 (RC5) and hash-based routes, I do this:

const appRoutes: Routes = [
  ...
  {path: '_', redirectTo: '/facebookLoginSuccess'},
  ...
]

and

export const routing = RouterModule.forRoot(appRoutes, { useHash: true });

As far as I understand, the = character in the route is interpreted as part of optional route parameters definition (see https://angular.io/docs/ts/latest/guide/router.html#!#optional-route-parameters), so not involved in the route matching.