firebaseuiexample.js

var uiConfig = {
  callbacks: {
    signInSuccessWithAuthResult: function (authResult, redirectUrl) {
      // User successfully signed in.
      // Return type determines whether we continue the redirect automatically
      // or whether we leave that to developer to handle.
      return true;
    },
    uiShown: function () {
      document.getElementById('loader').style.display = 'none';
    }
  },
  signInFlow: 'redirect',
  signInSuccessUrl: '<url-to-redirect-to-on-success>',
  signInOptions: [{
    provider: firebase.auth.GithubAuthProvider.PROVIDER_ID,
    scopes: [
      'gist'
    ],
  }],
  tosUrl: '<your-tos-url>',
  privacyPolicyUrl: '<your-privacy-policy-url>'
};
ui.start('#firebaseui-auth-container', uiConfig);