Javascript DOM HTML Element querySelectorAll() Method by tag name and attribute name

Introduction

Set the border style of all <a> elements in a <div> element that have a "target" attribute:

Click the button to add a red border to all links in DIV that have a target attribute.

The CSS selector a[target] makes sure that all links with a target attribute gets a yellow background:

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<!DOCTYPE html>
<html>
<head>
<style>
a[target] {// w ww. j  a v  a 2s  . co m
  background-color: yellow;
}
</style>
</head>
<body>

<div id="myDIV">
  <a href="https://www.java2s.com">java2s.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>

<button onclick="myFunction()">Test</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>
</html>



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