signInSuccessUrl always required

The documentation states that the signInSuccessUrl is only required as follows.

signInSuccessUrl: The URL where to redirect the user after a successful sign-in. Required when the signInSuccess callback is not used or when it returns true.

However this is not the case. Currently by having the signInSuccess callback return false you can ignore the signInSuccessUrl, but it it still required otherwise the following error will be thrown and the signInSuccess function will not be called.

firebase-auth.js:48 Uncaught Error: Configuration signInSuccessUrl is required.

[oliversisson]

I thought I’d just write the solution to this error “No redirect URL has been found. You must either specify a signInSuccessUrl in the configuration, pass in a redirect URL to the widget URL, or return false from the callback”

All you need to do is return false in the signInSuccess callback

  const uiConfig = {
    callbacks: {
      signInSuccess: () => false,
    },

[alipetarian]

@brandonfajardo I used this way and it worked for me.