Document querySelectorAll() Method - Set the background color of every <p> element where the parent is a <div> element: - Javascript DOM

Javascript examples for DOM:Document querySelectorAll

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Description

Document querySelectorAll() Method - Set the background color of every <p> element where the parent is a <div> element:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<head>
<style>
div {//from   w w w  .  j  a v a  2 s. co  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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