javascript/widgets/handler/common.js
function(providerId, opt_email) {
    // If popup flow enabled, this will fail and fallback to redirect.
    // TODO: Optimize to force redirect mode only.
    // For non-Google providers (not supported yet). This may end up signing the
    // user with a provider using different email. Even for Google, a user can
    // override the login_hint, but that should be fine as it is the user's
    // choice.
    firebaseui.auth.widget.handler.common.federatedSignIn(
        app, component, providerId, opt_email);
    return goog.Promise.resolve(true);
  }
function(providerId, opt_email) {
    // If popup flow enabled, this will fail and fallback to redirect.
    // TODO: Optimize to force redirect mode only.
    // For non-Google providers (not supported yet). This may end up signing the
    // user with a provider using different email. Even for Google, a user can
    // override the login_hint, but that should be fine as it is the user's
    // choice.
    firebaseui.auth.widget.handler.common.federatedSignIn(
        app, component, providerId, opt_email);
    return goog.Promise.resolve(true);
  }
function ( providerId , opt_email ) { // If popup flow enabled, this will fail and fallback to redirect. // TODO: Optimize to force redirect mode only. // For non-Google providers (not supported yet). This may end up signing the // user with a provider using different email. Even for Google, a user can // override the login_hint, but that should be fine as it is the user's // choice. firebaseui . auth . widget . handler . common . federatedSignIn ( app , component , providerId , opt_email ) ; return goog . Promise . resolve ( true ) ; }
Sign in with a provider ID.
@param {string} providerId The Firebase Auth provider ID to sign-in with.
@param {?string=} opt_email The optional email to sign-in with.
@return {!goog.Promise<boolean>}
Sign in with a provider ID .