Throw runtime error if jQuery not available

src/labkey/dom/Utils.spec.ts

@@ -0,0 +1,24 @@
+/*
+ * Copyright (c) 2020 LabKey Corporation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import { loadDOMContext } from './constants';
+
+describe('loadDOMContext', () => {
+
+    it('Error without jQuery', () => {
+        const { $ } = loadDOMContext();
+        expect(() => { $(); }).toThrowError('jQuery');
+    });
+});

src/labkey/dom/constants.ts

@@ -34,7 +34,9 @@ if (typeof jQuery !== 'undefined') {
     LABKEY.$ = jQuery;
 }
 else {
-    console.warn('jQuery not available. When using the DOM version of the LabKey API jQuery is expected to be available.');
+    LABKEY.$ = () => {
+        throw new Error('jQuery not available. When using the DOM version of the LabKey API jQuery is expected to be available.');
+    };
 }
 
 export function loadDOMContext(): LabKeyDOM {