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<!DOCTYPE html>
<html>
<head>
<style> 
#myDIV {
  width: 500px;
  height: 500px;
  background-color: lightblue;
}
</style>
</head>
<body>
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<p>Click the "Try it" button to toggle between hiding and showing the DIV element:</p>
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<button onclick="myFunction()">Try it</button>
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<div id="myDIV">
This is my DIV element.
</div>
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<p><b>Note:</b> The element will not take up any space when the display property set to "none".</p>
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<script>
function myFunction() {
  var x = document.getElementById('myDIV');
  if (x.style.display === 'none') {
    x.style.display = 'block';
  } else {
    x.style.display = 'none';
  }
}
</script>
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</body>
</html>
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