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<!DOCTYPE html>
<!--
SPDX-FileCopyrightText: Chris Pressey, the original author of this work, has dedicated it to the public domain.
For more information, please refer to <https://unlicense.org/>
SPDX-License-Identifier: Unlicense
-->
<head>
  <meta charset="utf-8">
  <title>MobX Example</title>
  <script src="https://unpkg.com/mobx@4.9.4/lib/mobx.umd.min.js"></script>
</head>
<body>

<h1>MobX Example</h1>

<div id="status">
</div>

<script type="text/javascript">
  var statusElem = document.getElementById('status');
  var data = mobx.observable({
      tick: 0
  });
  // This will update the display with "40" after 3 seconds,
  // and then no more, as it disposes the observer after firing:
  /*
  mobx.when(function() {
      return (data.tick > 30);
  }, function() {
      statusElem.innerHTML = "<p>" + data.tick + "</p>";
  });
  */

  mobx.autorun(function() {
      if (data.tick > 30) {
          statusElem.innerHTML = "<p>" + data.tick + "</p>";
      }
  });

  i = setInterval(function() {
      data.tick = data.tick + 10;
  }, 1000);
</script>

</body>