How to get first span element of a div and change class using jQuery

Question

I have a div with a span

<div id="div1">
    <span class="">hello</span>
</div>

When i click on div i want to change the class of only first span element of the div

$('#div1').click(function() {
    // ... check if first span element inside the div .. if there and change the class..    
});  

Answer 1

Multiple answers valid. My approach:

$('#div1').click(function() {    
     $(this).find('span').first().attr('class','newClassName');
});