| <!DOCTYPE html> |
| <head> |
| <title>Deferred loading=lazy images load relative to the document's base URL |
| at parse-time</title> |
| <link rel="author" title="Dom Farolino" href="mailto:[email protected]"> |
| <link rel="author" title="Raj T" href="mailto:[email protected]"> |
| <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"); |
| |
| let has_window_loaded = false; |
| |
| async_test(t => { |
| // Change the document's base URL to a bogus one, and scroll the |
| // below-viewport img into view. When it loads, it should load relative |
| // to the old base URL computed at parse-time. |
| window.addEventListener("load", t.step_func(() => { |
| window.history.pushState(2, document.title, |
| '/invalid-url-where-no-subresources-exist/') |
| has_window_loaded = true; |
| below_viewport_img.element().scrollIntoView(); |
| })); |
| |
| below_viewport_img.promise.then(t.step_func_done(() => { |
| assert_true(has_window_loaded, |
| "Below-viewport loading=lazy images do not block the " + |
| "window load event"); |
| })); |
| |
| below_viewport_img.promise.catch( |
| t.unreached_func("The image request should not load relative to the " + |
| "current (incorrect) base URL.") |
| ); |
| }, "When a loading=lazy image is loaded, it loads relative to the " + |
| "document's base URL computed at parse-time."); |
| </script> |
| |
| <body> |
| <div style="height:1000vh;"></div> |
| <script> |
| // Change the document's base URL so that the img request parses relative |
| // to it when it sets up the request at parse-time. |
| window.history.pushState(1, document.title, 'resources/') |
| </script> |
| <img id="below-viewport" src="image.png" loading="lazy" |
| onload="below_viewport_img.resolve()" |
| onerror="below_viewport_img.reject()"> |
| </body> |
