Add custom domain initialization

auth-next/index.js

@@ -26,7 +26,7 @@ function makeFacebookCredential(response) {
 function makeEmailCredential(email, password) {
   // [START auth_make_email_credential]
   const { EmailAuthProvider } = require("firebase/auth");
-  
+
   const credential = EmailAuthProvider.credential(email, password);
   // [END auth_make_email_credential]
 }
@@ -121,3 +121,17 @@ function signInRedirect(provider) {
   signInWithRedirect(auth, provider);
   // [END auth_signin_redirect]
 }
+
+function initializeWithCustomDomain() {
+  // [START auth_init_custom_domain]
+  const { initializeApp } = require("firebase/app");
+
+  const firebaseConfig = {
+    apiKey: "...",
+    // By default, authDomain is '[YOUR_APP].firebaseapp.com'.
+    // You may replace it with a custom domain.
+    authDomain: '[YOUR_CUSTOM_DOMAIN]'
+  };
+  const firebaseApp = initializeApp(firebaseConfig);
+  // [END auth_init_custom_domain]
+}

auth/index.js

@@ -101,3 +101,14 @@ function signInRedirect(provider) {
   firebase.auth().signInWithRedirect(provider);
   // [END auth_signin_redirect]
 }
+
+function initializeWithCustomDomain() {
+  // [START auth_init_custom_domain]
+  firebase.initializeApp({
+    apiKey: '...',
+    // By default, authDomain is '[YOUR_APP].firebaseapp.com'.
+    // You may replace it with a custom domain.
+    authDomain: '[YOUR_CUSTOM_DOMAIN]'
+  });
+  // [END auth_init_custom_domain]
+}

auth/oidc.js

@@ -4,9 +4,6 @@
 import firebase from "firebase/app";
 import "firebase/auth";
 
-// [SNIPPET_REGISTRY disabled]
-// [SNIPPETS_SEPARATION enabled]
-
 function oidcProvider() {
   // [START auth_oidc_provider_create]
   const provider = new firebase.auth.OAuthProvider('oidc.myProvider');

auth/saml.js

@@ -4,9 +4,6 @@
 import firebase from "firebase/app";
 import "firebase/auth";
 
-// [SNIPPET_REGISTRY disabled]
-// [SNIPPETS_SEPARATION enabled]
-
 function samlProvider() {
   // [START auth_saml_provider_create]
   const provider = new firebase.auth.SAMLAuthProvider('saml.myProvider');

snippets/auth-next/index/auth_init_custom_domain.js

@@ -0,0 +1,17 @@
+// This snippet file was generated by processing the source file:
+// ./auth-next/index.js
+//
+// To update the snippets in this file, edit the source and then run
+// 'npm run snippets'.
+
+// [START auth_init_custom_domain_modular]
+import { initializeApp } from "firebase/app";
+
+const firebaseConfig = {
+  apiKey: "...",
+  // By default, authDomain is '[YOUR_APP].firebaseapp.com'.
+  // You may replace it with a custom domain.
+  authDomain: '[YOUR_CUSTOM_DOMAIN]'
+};
+const firebaseApp = initializeApp(firebaseConfig);
+// [END auth_init_custom_domain_modular]