mozilla-central: image/test/mochitest/test_error_events.html@246e16bb06c941d6f64d807d43c807bfba04ae86

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=715308
-->
<head>
  <title>Test for Bug 715308 comment 93</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
</head>
<body>

<!-- Test for Bug 715308 comment 93:

  - For a valid image, onload is fired and onerror is never fired.
  - For an image with errors, onerror is fired, but onload is never fired.
  - For any image, either onload or onerror is fired, but never both.

 -->
<script type="text/javascript">
"use strict";

SimpleTest.waitForExplicitFinish();

var numCallbacks = 0;

function image_error(name)
{
  numCallbacks++;
  ok(name == 'error-early', "Got onerror for " + name);
}

function image_load(name)
{
  numCallbacks++;
  ok(name == 'shaver', "Got onload for " + name);
}

function page_load()
{
  ok(numCallbacks == 2, 'Got page load before all onload/onerror callbacks?');

  // Spin the event loop a few times to let image_error run if it's going to,
  // then finish the test.
  SimpleTest.executeSoon(function() {
    SimpleTest.executeSoon(function() {
      SimpleTest.executeSoon(function() {
        SimpleTest.finish();
      });
    });
  });
}

addEventListener('load', page_load);

</script>

<div id="content">
  <img src='shaver.png' onerror='image_error("shaver")' onload='image_load("shaver")'>
  <img src='error-early.png' onerror='image_error("error-early")' onload='image_load("error-early")'>
</div>

</pre>
</body>
</html>

author	Andy Leiserson <aleiserson@mozilla.com>
	Sat, 19 Jul 2025 16:44:54 +0000 (12 hours ago)
changeset 797257	246e16bb06c941d6f64d807d43c807bfba04ae86
parent 755100	d583195912f47effd2e8608435a71006468bf399
permissions	-rw-r--r--