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<!DOCTYPE html>
<meta charset="utf-8">
<title>ScrollTimeline current time algorithm - NaN cases</title>
<link rel="help" href="https://wicg.github.io/scroll-animations/#current-time-algorithm">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
.scroller {
height: 100px;
width: 100px;
overflow: auto;
}
.content {
height: 500px;
width: 500px;
}
</style>
<div id='inlineScroller' class='scroller' style='display: inline;'>
<div class='content'></div>
</div>
<script>
'use strict';
test(function() {
const scroller = document.querySelector('#inlineScroller');
const scrollTimeline = new ScrollTimeline(
{ source: scroller, orientation: 'block' });
assert_equals(scrollTimeline.currentTime, null);
}, 'currentTime should be null for a display: inline source');
</script>
<div id='displayNoneScroller' class='scroller' style='display: none;'>
<div class='content'></div>
</div>
<script>
test(function() {
const scroller = document.querySelector('#displayNoneScroller');
const scrollTimeline = new ScrollTimeline(
{ source: scroller, orientation: 'block' });
assert_equals(scrollTimeline.currentTime, null);
}, 'currentTime should be null for a display: none source');
</script>
<script>
test(function() {
const scroller = document.createElement('div');
const content = document.createElement('div');
scroller.style.overflow = 'auto';
scroller.style.height = '100px';
scroller.style.width = '100px';
content.style.height = '250px';
content.style.width = '250px';
scroller.appendChild(content);
const scrollTimeline = new ScrollTimeline(
{ source: scroller, orientation: 'block' });
assert_equals(scrollTimeline.currentTime, null);
}, 'currentTime should be null for an unattached source');
</script>
<div id='notAScroller' class='scroller' style='overflow: visible;'>
<div class='content'></div>
</div>
<script>
test(function() {
const scroller = document.querySelector('#notAScroller');
const scrollTimeline = new ScrollTimeline(
{ source: scroller, orientation: 'block' });
assert_equals(scrollTimeline.currentTime, null);
}, 'currentTime should be null when the source is not a scroller');
</script>
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