oppia · seanlip · Jul 25, 2019 · Jul 8, 2019 · Jul 8, 2019 · Jul 8, 2019
diff --git a/core/templates/dev/head/services/IdGenerationService.ts b/core/templates/dev/head/services/IdGenerationService.ts
@@ -16,24 +16,18 @@
  * @fileoverview Service for generating random IDs.
  */
 
-import { downgradeInjectable } from '@angular/upgrade/static';
-import { Injectable } from '@angular/core';
-
-@Injectable({
-  providedIn: 'root'
-})
-export class IdGenerationService {
-  generateNewId() {
-    // Generates random string using the last 10 digits of
-    // the string for better entropy.
-    var randomString = Math.random().toString(36).slice(2);
-    while (randomString.length < 10) {
-      randomString = randomString + '0';
-    }
-    return randomString.slice(-10);
-  }
-}
-
 var oppia = require('AppInit.ts').module;
 
-oppia.factory('IdGenerationService', downgradeInjectable(IdGenerationService));
+oppia.factory('IdGenerationService', [function() {
+  return {
+    generateNewId: function() {
+      // Generates random string using the last 10 digits of
+      // the string for better entropy.
+      var randomString = Math.random().toString(36).slice(2);
+      while (randomString.length < 10) {
+        randomString = randomString + '0';
+      }
+      return randomString.slice(-10);
+    }
+  };
+}]);