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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <style>
    div {
      width: 100px;
      height: 100px;
      outline: 1px solid lime;
    }
    </style>
  </head>
  <body>
    <div id="target"></div>
    <script>
    "use strict";
    const target = document.getElementById("target");
    target.animate(
      {
        color: ["red", "lime"],
      },
      {
        id: "big-delay",
        duration: 1000,
        delay: Number.MAX_VALUE,
        iterations: Infinity,
      });
    target.animate(
      {
        opacity: [1, 0],
      },
      {
        id: "big-end-delay",
        duration: 1000,
        endDelay: Number.MAX_VALUE,
        iterations: Infinity,
      });
    target.animate(
      {
        marginLeft: ["0px", "100px"],
      },
      {
        id: "negative-big-delay",
        duration: 1000,
        delay: -Number.MAX_VALUE,
        iterations: Infinity,
      });
    target.animate(
      {
        paddingLeft: ["0px", "100px"],
      },
      {
        id: "negative-big-end-delay",
        duration: 1000,
        endDelay: -Number.MAX_VALUE,
        iterations: Infinity,
      });
    target.animate(
      {
        backgroundColor: ["lime", "white"],
      },
      {
        id: "big-iteration-start",
        duration: 1000,
        iterations: Infinity,
        iterationStart: Number.MAX_VALUE,
      });
    </script>
  </body>
</html>