jQuery: check if a div contains a div with class on

Question

I have several <div> elements inside another <div>.

I want to do an if statement which is true if a div inside the top div contains class on.

HTML:

<div class="toDiv">     <div>      </div>     <div class="on">      </div> </div> 

jQuery:

if ($(".toDiv").contains("on")) {     // do something } 

Answer 1

if ($(".toDiv").find(".on").length > 0){    ///do something } 

or

if ($(".toDiv .on").length > 0){    ///do something } 

Answer 2

$('div.toDiv').each(function() {     if($('div.on', this).length > 0) {         //do something with this     } });