<!DOCTYPE html>
<html class="reftest-wait">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#named-timeline-range">
<link rel="stylesheet" href="support/animation-range.css">
<script src="/common/reftest-wait.js"></script>
<style>
.meter {
  animation: active-interval linear 100s paused;
  animation-timeline: auto;
}

.bar {
  animation: slide-in linear 100s paused;
  animation-timeline: auto;
}
</style>
</head>
<body onload="test();">
<h3>View timeline</h3>
<template id="meters">
  <div class="meters">
    <div class="cover"><div class="meter"><div class="bar"></div></div><div>Cover</div></div>
    <div class="contain"><div class="meter"><div class="bar"></div></div><div>Contain</div></div>
    <div class="entry"><div class="meter"><div class="bar"></div></div><div>Entry</div></div>
    <div class="exit"><div class="meter"><div class="bar"></div></div><div>Exit</div></div>
  </div>
</template>
<div class="flex">
  <div>
    <div class="scroller" data-scroll-top="10">
      <div class="subject" data-progress=".08333,-1,.5,-1"></div>
      <div class="spacer"></div>
    </div>
  </div>
  <div>
    <div class="scroller" data-scroll-top="30">
      <div class="subject" data-progress=".25,.125,2,-1"></div>
      <div class="spacer"></div>
    </div>
  </div>
  <div>
    <div class="scroller" data-scroll-top="90">
      <div class="subject" data-progress=".75,.875,2,-1"></div>
      <div class="spacer"></div>
    </div>
  </div>
  <div>
    <div class="scroller" data-scroll-top="110">
      <div class="subject" data-progress=".91667,2,2,.5"></div>
      <div class="spacer"></div>
    </div>
  </div>
</div>
</body>
<script>
  function test() {
    let template = document.querySelector('#meters');
    let scrollers = document.querySelectorAll('.scroller');
    for (let i = 0; i < scrollers.length; i++) {
      let subject = scrollers[i].querySelector('.subject');
      let clone = template.content.cloneNode(true);
      let meters = clone.querySelectorAll('.meter');
      let progress = subject.getAttribute('data-progress').split(',').map(s => parseFloat(s));
      for (let meter of meters) {
        let bar = meter.querySelector('.bar');
        let startTime = -progress.splice(0, 1)[0] * 100;
        meter.style.animationDelay = `${startTime}s`;
        bar.style.animationDelay = `${startTime}s`;
      }
      subject.appendChild(clone);
      scrollers[i].scrollTop = parseInt(scrollers[i].getAttribute('data-scroll-top'));
    }
    takeScreenshot();
  }
</script>
</html>
