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44 lines
1.8 KiB
HTML
44 lines
1.8 KiB
HTML
<!DOCTYPE html>
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<head>
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<title>Images with loading='eager' load immediately regardless of their position with respect to the viewport</title>
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<link rel="author" title="Scott Little" href="mailto:sclittle@chromium.org">
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<link rel="help" href="https://github.com/scott-little/lazyload">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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</head>
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<!--
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Marked as tentative until https://github.com/whatwg/html/pull/3752 is landed.
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-->
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<script>
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const t = async_test("Test that images with loading='eager' load immediately regardless of their position with respect to the viewport.");
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let has_in_viewport_loaded = false;
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const in_viewport_img_onload = t.step_func(function() {
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assert_false(has_in_viewport_loaded, "The in_viewport element should load only once.");
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has_in_viewport_loaded = true;
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});
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let has_below_viewport_loaded = false;
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const below_viewport_img_onload = t.step_func(function() {
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assert_false(has_below_viewport_loaded, "The below_viewport element should load only once.");
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has_below_viewport_loaded = true;
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});
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window.addEventListener("load", t.step_func_done(function() {
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assert_true(has_in_viewport_loaded, "The in_viewport element should have loaded before window.load().");
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assert_true(has_below_viewport_loaded, "The below_viewport element should have loaded before window.load().");
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}));
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</script>
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<body>
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<img id="in_viewport" src="resources/image.png?first" loading="eager" onload="in_viewport_img_onload();">
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<div style="height:10000px;"></div>
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<!--
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The below_viewport element loads very slowly in order to ensure that the
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window load event is blocked on it.
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-->
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<img id="below_viewport" src="resources/image.png?pipe=trickle(d2)" loading="eager" onload="below_viewport_img_onload();">
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</body>
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