PR Changes

adobecom · Aug 23, 2024 · b8830e4 · b8830e4
1 parent 9d6191f
commit b8830e4
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Showing 3 changed files with 18 additions and 3 deletions.
diff --git a/libs/blocks/marketo/marketo.js b/libs/blocks/marketo/marketo.js
@@ -13,7 +13,14 @@
 /*
  * Marketo Form
  */
-import { parseEncodedConfig, loadScript, localizeLink, createTag, createIntersectionObserver } from '../../utils/utils.js';
+import {
+  parseEncodedConfig,
+  loadScript,
+  loadLink,
+  localizeLink,
+  createTag,
+  createIntersectionObserver,
+} from '../../utils/utils.js';
 
 const ROOT_MARGIN = 50;
 const FORM_ID = 'form id';
@@ -222,7 +229,7 @@ export default function init(el) {
   el.replaceChildren(fragment);
   el.classList.add('loading');
 
-  document.head.append(createTag('link', { rel: 'dns-prefetch', href: `https://${baseURL}` }));
+  loadLink(`https://${baseURL}`, { rel: 'dns-prefetch' });
 
   createIntersectionObserver({
     el,

diff --git a/test/blocks/marketo/marketo.test.html b/test/blocks/marketo/marketo.test.html
@@ -65,7 +65,7 @@ <h2 id="fill-out-the-form-to-view-the-report">Fill out the form to view the repo
     import { expect } from '@esm-bundle/chai';
     import { stub } from 'sinon';
     import { waitForElement } from '../../helpers/waitfor.js';
-    import { loadScript, parseEncodedConfig } from '../../../libs/utils/utils.js';
+    import { loadScript, loadLink, parseEncodedConfig } from '../../../libs/utils/utils.js';
     import init, { setPreferences, formValidate, formSuccess } from '../../../libs/blocks/marketo/marketo.js';
 
     runTests(() => {
@@ -86,6 +86,10 @@ <h2 id="fill-out-the-form-to-view-the-report">Fill out the form to view the repo
           expect(desc).to.exist;
         });
 
+        it('preload Marketo', async () => {
+          expect(loadLink.calledOnce).to.be.true;
+        });
+
         it('loads Marketo script', async () => {
           expect(loadScript.calledOnce).to.be.true;
           expect(loadScript.calledWith('https://engage.adobe.com/js/forms2/js/forms2.min.js')).to.be.true;

diff --git a/test/blocks/marketo/mocks/marketo-utils.js b/test/blocks/marketo/mocks/marketo-utils.js
@@ -63,3 +63,7 @@ export function createIntersectionObserver({ el, callback /* , once = true, opti
 }
 
 export const localizeLink = (href) => href;
+
+export const loadLink = stub().returns(new Promise((resolve) => {
+  resolve();
+}));