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<!DOCTYPE html>
<html>
<head>
<style>
a[target] {
  background-color: yellow;
}
</style>
</head>
<body>
<p>The CSS selector a[target] makes sure that all links with a target attribute gets a yellow background:</p>
<div id="myDIV">
  <a href="../index.html">w3schools.com</a>
  <a href="http://www.disney.com/" target="_blank">disney.com</a>
  <a href="http://www.wikipedia.org/" target="_top">wikipedia.org</a>
</div>
<p>Click the button to add a red border to all links in DIV that have a target attribute.</p>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
  var x = document.getElementById("myDIV").querySelectorAll("a[target]");
  var i;
  for (i = 0; i < x.length; i++) {
    x[i].style.border = "10px solid red";
  }
}
</script>
</body>
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</html>