delay-load-event.html | Explore in Territory

<!DOCTYPE html>
<meta charset="utf-8">
<title>Inline image element blocks load</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
var img_loaded = false;
</script>
<img src="/images/blue.png?pipe=trickle(d2)" onload="img_loaded = true;">
<script>
test(function() {
  assert_false(img_loaded);
}, "script execution doesn't wait for the image to load");

async_test(function(t) {
  document.addEventListener("DOMContentLoaded", t.step_func_done(function() {
    assert_false(img_loaded);
  }));
}, "DOMContentLoaded doesn't wait for images");

async_test(function(t) {
  window.addEventListener("load", t.step_func_done(function() {
    assert_true(img_loaded);
  }));
}, "Image element delays window's load event");
</script>

chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/the-img-element/delay-load-event.html