<!DOCTYPE html>
<title>Various test cases producing infinite active duration</title>
<link rel="help" href="https://drafts.csswg.org/css-animations-1/#animation-iteration-count" />
<script>
  let effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, delay: -17592186044416, iterations: Infinity });
  effect.getComputedTiming();

  // Infinity delay + Infinity active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, delay: Number.MAX_VALUE, iterations: Infinity });
  effect.getComputedTiming();

  // Infinity end delay + Infinity active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, endDelay: Number.MAX_VALUE, iterations: Infinity });
  effect.getComputedTiming();

  // Infinity delay + Infinity active duration + Infinity end delay
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1,
      delay: Number.MAX_VALUE, endDelay: Number.MAX_VALUE,
      iterations: Infinity });
  effect.getComputedTiming();

  // -Infinity delay + Infinity active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, delay: -Number.MAX_VALUE, iterations: Infinity });
  effect.getComputedTiming();

  // -Infinity end delay + Infinity active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, endDelay: -Number.MAX_VALUE, iterations: Infinity });
  effect.getComputedTiming();

  // -Infinity delay + Infinity active duration + -Infinity end delay
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1,
      delay: -Number.MAX_VALUE, endDelay: -Number.MAX_VALUE,
      iterations: Infinity });
  effect.getComputedTiming();

  // -Infinity delay + finite active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, delay: -Number.MAX_VALUE, iterations: 1 });
  effect.getComputedTiming();

  // -Infinity end delay + finite active duration
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, endDelay: -Number.MAX_VALUE, iterations: 1 });
  effect.getComputedTiming();

  // very large iterations
  effect = new KeyframeEffect(null,
    { opacity: [0, 1] },
    { duration: 1, delay: 281474976710655, iterations: 18014398509481984 });
  effect.getComputedTiming();

</script>
