Get first child node of specific type - JavaScript

Question

Is it possible to get a child dom element, which will be the first child of a specific type.

For example in both of these examples I want to get the img ele

Answer 1

Try this

var firstIMG = document.getElementById('mylink').getElementsByTagName('img')[0];

Answer 2

Here is a javascript function

function getFirst(con,tag)
{
    return con.getElementsByTagName(tag)[0];
}


//html markup
<a id="mylink" href="#"><img src="myimage.jpg" /></a>
<a id="mylink1" href="#"><img src="myimage.jpg" /></a>

//test
var con=document.getElementById('mylink');
var first=getFirst(con,'img');

Answer 3

You can also use querySelector:

var firstImg = document.querySelector("#mylink > img:first-of-type");

Answer 4

var anchor = document.getElementById('mylink');
var images = anchor.getElementsByTagName('img');
var image = images.length ? images[0] : null;