| <!DOCTYPE html> |
| <head> |
| <title>Deferred loading=lazy images are fetched with the latest |
| `referrerpolicy` attribute</title> |
| <link rel="author" title="Dom Farolino" href="mailto:dom@chromium.org"> |
| <link rel="author" title="Raj T" href="mailto:rajendrant@chromium.org"> |
| <link rel="help" href="https://html.spec.whatwg.org/multipage/images.html#updating-the-image-data"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="../resources/common.js"></script> |
| </head> |
| |
| <script> |
| const below_viewport_img = new ElementLoadPromise("below_viewport_img"); |
| |
| async_test(function(t) { |
| // At this point the image's #updating-the-image-data algorithm has been |
| // invoked, and the image request has been deferred. The deferred request |
| // was created with the default referrer policy, which will result in a |
| // `Referer` header being sent when the request is finally made. The request |
| // is also for an image that the server will send a broken response for if |
| // the request has a `Referer` header. |
| // While the request is deferred, we'll set the `referrerpolicy` attribute |
| // to `no-referrer`, which would cause the image request to succeed. Since |
| // `referrerpolicy` mutations trigger another #updating-the-image-data |
| // invocation (replacing the first one), when we scroll the image into view, |
| // the image should be fetched with no `Referer` header, and succeed. |
| window.addEventListener("load", t.step_func(() => { |
| below_viewport_img.element().referrerPolicy = "no-referrer"; |
| below_viewport_img.element().scrollIntoView(); |
| })); |
| |
| below_viewport_img.promise |
| .then(t.step_func_done()) |
| .catch(t.unreached_func("The image request should successfully load")) |
| }, "Test that when a deferred image is loaded, it uses the latest referrerpolicy"); |
| </script> |
| |
| <body> |
| <div style="height:1000vh;"></div> |
| <img id="below_viewport_img" |
| src="resources/referrer-checker-img.py?expected_referrer=" |
| loading="lazy" referrerpolicy="unsafe-url" |
| onload="below_viewport_img.resolve();" |
| onerror="below_viewport_img.reject();"> |
| </body> |
