<!DOCTYPE html>
<head>
<title>Iframes with loading='eager' load immediately regardless of their
position with respect to the viewport.</title>
<link rel="author" title="Scott Little" href="mailto:[email protected]">
<link rel="help" href="https://github.com/scott-little/lazyload">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
</head>
<script>
const t = async_test("Test that iframes with loading='eager' load " +
"immediately regardless of their position with " +
"respect to the viewport.");
let has_in_viewport_loaded = false;
const in_viewport_iframe_onload = t.step_func(() => {
assert_false(has_in_viewport_loaded,
"The in_viewport element should load only once.");
has_in_viewport_loaded = true;
});
let has_below_viewport_loaded = false;
const below_viewport_iframe_onload = t.step_func(() => {
assert_false(has_below_viewport_loaded,
"The below_viewport element should load only once.");
has_below_viewport_loaded = true;
});
window.addEventListener("load", t.step_func_done(() => {
assert_true(has_in_viewport_loaded,
"The in_viewport element should have loaded before " +
"window.load().");
assert_true(has_below_viewport_loaded,
"The below_viewport element should have loaded before " +
"window.load().");
}));
</script>
<body>
<iframe id="in_viewport" src="resources/subframe.html?in-viewport"
loading="eager" width="200px" height="100px"
onload="in_viewport_iframe_onload();"></iframe>
<div style="height:1000vh;"></div>
<!-- The below_viewport element loads very slowly in order to ensure that the
window load event is blocked on it. -->
<iframe id="below_viewport"
src="resources/subframe.html?below-viewport&pipe=trickle(d1)"
loading="eager" width="200px" height="100px"
onload="below_viewport_iframe_onload();"></iframe>
</body>
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