Javascript DOM HTML Document querySelectorAll() Method by direct parent

Introduction

Set the background color of every <p> element where the parent is a <div> element:

Click the button to change the background color of every p element where the parent is a div element.

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<!DOCTYPE html>
<html>
<head>
<style>
div {/*from  w w  w  .  j a v a2  s. c o  m*/
  border: 1px solid black;
  margin-bottom: 10px;
}
</style>
</head>
<body>

<div>
  <h3>H3 element</h3>
  <p>I am a p element, my parent is a div element.</p>
</div>

<div>
  <h3>H3 element</h3>
  <p>I am a p element, my parent is also a div element.</p>
</div>
<button onclick="myFunction()">Test</button>

<script>
function myFunction() {
  var x = document.querySelectorAll("div > p");
  var i;
  for (i = 0; i < x.length; i++) {
    x[i].style.backgroundColor = "red";
  }
}
</script>

</body>
</html>



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