Element item() Method - Loop through all elements with class="child" in a <div> element, and change their background color: - Javascript DOM

Javascript examples for DOM:Element item

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Description

Element item() Method - Loop through all elements with class="child" in a <div> element, and change their background color:

Demo Code

ResultView the demo in separate window 

<!DOCTYPE html>
<html>
<head>
<style>
div {/*from  w  ww. j a  v a  2s .  c  o m*/
    border: 1px solid black;
    margin: 5px;
}
</style>
</head>
<body>

<div id="myDIV">
  <p class="child">A p element with class="child" in a div.</p>
  <p class="child">Another p element with class="child" in a div.</p>
  <p>A p element in div with a <span class="child">span element with class="child"</span> inside of it.</p>
</div>

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

<script>
function myFunction() {
    var div = document.getElementById("myDIV");
    var nodelist = div.getElementsByClassName("child");

    var i;
    for (i = 0; i < nodelist.length; i++) {
        nodelist[i].style.backgroundColor = "red";
    }
}
</script>

</body>
</html>

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