Propagage importance (#36244)

ampproject · Oct 5, 2021 · a690bd4 · a690bd4
1 parent e2a9689
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diff --git a/src/builtins/amp-img/amp-img.js b/src/builtins/amp-img/amp-img.js
@@ -29,6 +29,7 @@ export const ATTRIBUTES_TO_PROPAGATE = [
   'crossorigin',
   'referrerpolicy',
   'title',
+  'importance',
   'sizes',
   'srcset',
   'src',

diff --git a/test/unit/builtins/test-amp-img.js b/test/unit/builtins/test-amp-img.js
@@ -178,6 +178,18 @@ describes.sandboxed('amp-img', {}, (env) => {
     });
   });
 
+  it('should propagate importance', () => {
+    return getImg({
+      src: '/examples/img/sample.jpg',
+      importance: 'high',
+      width: 320,
+      height: 240,
+    }).then((ampImg) => {
+      const img = ampImg.querySelector('img');
+      expect(img.getAttribute('importance')).to.equal('high');
+    });
+  });
+
   it('should propagate data attributes', () => {
     return getImg({
       src: '/examples/img/sample.jpg',