Javascript DOM HTML Element firstElementChild Property get name of first element

Introduction

Get the tag name of the first child element of a <div> element:

Click the button to get the tag name of the DIV's first child element.

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<!DOCTYPE html>
<html>
<head>
<style>
div {//from w w w. j a  v  a  2 s  .co  m
  border: 1px solid black;
  margin: 15px;
}
</style>
</head>
<body>
<div id="myDIV">
  <p>A P element - First child in div</p>
  <span>A Span element - Last child in div</span>
</div>

<button onclick="myFunction()">Test</button>
<p id="demo"></p>

<script>
function myFunction() {
  var x = document.getElementById("myDIV").firstElementChild.tagName;
  document.getElementById("demo").innerHTML = x;
}
</script>

</body>
</html>



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