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<!DOCTYPE html>
<head>
<title>Below-viewport loading=lazy not-rendered images should never load,
even when scrolled into view</title>
<link rel="author" title="Rob Buis" href="mailto:rbuis@igalia.com">
<link rel="author" title="Dom Farolino" href="mailto:dom@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="../resources/common.js"></script>
</head>
<body>
<!-- These images must not attempt to load when scrolled into the
viewport -->
<img id="display_none" style="display:none;" src="resources/image.png?not-rendered-2" loading="lazy"
onload="display_none_img.resolve();" onerror="display_none_img.reject();">
<img id="attribute_hidden" hidden src="resources/image.png?not-rendered-3" loading="lazy"
onload="attribute_hidden_img.resolve();" onerror="attribute_hidden_img.reject();">
<img id="js_display_none" src="resources/image.png?not-rendered-4" loading="lazy"
onload="js_display_none_img.resolve();" onerror="js_display_none_img.reject();">
<script>
document.getElementById("js_display_none").style = 'display:none;';
</script>
<!-- Later in the test we'll scroll to this div, instead of the above images,
since due to them not being rendered, they cannot be scrolled to -->
<div id="rendered_div"></div>
</body>
<script>
const display_none_img = new ElementLoadPromise("display_none");
const attribute_hidden_img = new ElementLoadPromise("attribute_hidden");
const js_display_none_img = new ElementLoadPromise("js_display_none");
const rendered_div_element = document.querySelector('#rendered_div');
async_test(t => {
window.addEventListener("load", t.step_func(() => {
rendered_div.scrollIntoView();
}));
const unreached_not_rendered_img_func =
t.unreached_func("The not-rendered below-viewport loading=lazy images " +
"should not attempt to load.");
display_none_img.promise
.then(unreached_not_rendered_img_func)
.catch(unreached_not_rendered_img_func);
attribute_hidden_img.promise
.then(unreached_not_rendered_img_func)
.catch(unreached_not_rendered_img_func);
js_display_none_img.promise
.then(unreached_not_rendered_img_func)
.catch(unreached_not_rendered_img_func);
// If none of the above images load after being scrolled to within the below
// timeout, the test passes.
t.step_timeout(t.done, 2000);
}, "Below-viewport loading=lazy not-rendered images should never load, " +
"even when scrolled into view");
</script>
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