Add support for setting custom hosting link domain in test app.

Author: NhienLam

packages/auth/demo/public/index.html

@@ -823,6 +823,11 @@
                   <input type="text" class="form-control" id="ibi" placeholder="iOS Bundle ID"/>
                 </div>
               </form>
+              <div class="group">Mobile link</div>
+              <div class="form-group">
+                <input type="text" class="form-control" id="hostingLinkDomain"
+                       placeholder="Custom Hosting Link Domain"/>
+              </div>
               <form class="form form-bordered no-submit">
                 <div class="btn-group radio-block" id="handle-in-app-selection"
                      data-toggle="buttons">

packages/auth/demo/src/index.js

@@ -49,8 +49,8 @@ import {
   signInWithCredential,
   signInWithCustomToken,
   signInWithEmailAndPassword,
+  signInWithEmailLink,
   TotpMultiFactorGenerator,
-  TotpSecret,
   unlink,
   updateEmail,
   updatePassword,
@@ -995,6 +995,7 @@ function getActionCodeSettings() {
   const installApp = $('input[name=install-app]:checked').val() === 'Yes';
   const handleCodeInApp =
     $('input[name=handle-in-app]:checked').val() === 'Yes';
+  const hostingLinkDomain = $('#hostingLinkDomain').val();
   if (url || apn || ibi) {
     actionCodeSettings['url'] = url;
     if (apn) {
@@ -1010,6 +1011,9 @@ function getActionCodeSettings() {
       };
     }
     actionCodeSettings['handleCodeInApp'] = handleCodeInApp;
+    if (hostingLinkDomain) {
+      actionCodeSettings['linkDomain'] = hostingLinkDomain;
+    }
   }
   return actionCodeSettings;
 }
@@ -1020,6 +1024,7 @@ function onActionCodeSettingsReset() {
   $('#apn').val('');
   $('#amv').val('');
   $('#ibi').val('');
+  $('#hostingLinkDomain').val('');
 }
 
 /**