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<!DOCTYPE html>
<meta charset="utf-8">
<title>AmbientLightSensor Test: onchange</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<link rel="help" href="https://www.w3.org/TR/ambient-light/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<h2>Description</h2>
<p>
This test validates that the "onchange" event can be invoked when changing the ambient light illuminance of the device.
</p>
<h2>Precondition</h2>
<ol>
<li>
Change the ambient light illuminance of the device.
</li>
</ol>
<script>
async_test(function(t) {
let sensor = new AmbientLightSensor();
sensor.start();
sensor.onchange = t.step_func_done(function(event) {
sensor.stop();
});
sensor.onerror = t.step_func_done(function(event) {
assert_unreached(event.error.name + ":" + event.error.message);
});
}, "event change fired");
</script>
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