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Result Size: 625 x 571
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<!DOCTYPE html>
<html>
<body>
<h2>Using The class Attribute in JavaScript</h2>
<p>Click the button, to hide all elements with the class name "city", with JavaScript:</p>
<button onclick="myFunction()">Hide elements</button>
<h2 class="city">London</h2>
<p>London is the capital of England.</p>
<h2 class="city">Paris</h2>
<p>Paris is the capital of France.</p>
<h2 class="city">Tokyo</h2>
<p>Tokyo is the capital of Japan.</p>
<script>
function myFunction() {
  var x = document.getElementsByClassName("city");
  for (var i = 0; i < x.length; i++) {
    x[i].style.display = "none";
  }
}
</script>
</body>
<!-- Mirrored from www.w3schools.com/html/tryit.asp?filename=tryhtml_classes_js by HTTrack Website Copier/3.x [XR&CO'2014], Mon, 27 Jan 2020 02:33:16 GMT -->
</html>
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