| <!DOCTYPE html> |
| <head> |
| <title>Deferred images with loading='lazy' use the original |
| base URL specified at the parse time</title> |
| <link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com"> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <script src="common.js"></script> |
| <base href='/loading/lazyload/resources/'> |
| </head> |
| |
| <!-- |
| Marked as tentative until https://github.com/whatwg/html/pull/3752 is landed. |
| --> |
| |
| <script> |
| const below_viewport_img_promise = new ElementLoadPromise("below_viewport_img"); |
| |
| let has_window_loaded = false; |
| |
| async_test(function(t) { |
| |
| // Change the base URL and scroll down to load the deferred elements. |
| window.addEventListener("load", t.step_func(function() { |
| const base = document.getElementsByTagName('base')[0]; |
| base.href = '/invalid-url-where-no-subresources-exist/'; |
| has_window_loaded = true; |
| below_viewport_img_promise.element().scrollIntoView(); |
| })); |
| |
| below_viewport_img_promise.promise.then( |
| t.step_func_done(function() { |
| assert_true(has_window_loaded, |
| "Below-viewport loading=lazy images do not block the " + |
| "window load event"); |
| assert_true(below_viewport_img_promise.element().complete, |
| "The loading=lazy image should be considered complete " + |
| "upon load."); |
| assert_greater_than(below_viewport_img_promise.element().naturalWidth, |
| 0, |
| "The loading=lazy should have non-zero width " + |
| "upon loading"); |
| }) |
| ).catch(t.unreached_func("The image request should not load relative to " + |
| "the current (incorrect) base URL.")); |
| }, "Deferred images with loading='lazy' use the original base URL " + |
| "specified at the parse time"); |
| </script> |
| |
| <body> |
| <div style="height:1000vh"></div> |
| <img id="below_viewport_img" src="image.png" loading="lazy" |
| onload="below_viewport_img_promise.resolve();" |
| onerror="below_viewport_img_promise.reject();"> |
| </body> |
