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<!DOCTYPE html>
<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>
<div id="target"></div>
<script>
test(function() {
var keyframes = [
{left: '0px'},
{left: '100px'}
];
var timing = {
duration: 1,
delay: -100,
};
var player = target.animate(keyframes, timing);
document.timeline.currentTime = 0;
var oldStartTime = player.startTime;
player.startTime += 2000;
assert_equals(player.startTime, oldStartTime + 2000);
player.play();
assert_equals(player.startTime, null);
assert_equals(player.currentTime, 0);
}, 'Play() called with a large negative delay');
</script>
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