How can I detect when a new element has been added to the document in jquery?

Question

How can I detect when a new element has been added to the document in jquery ?

Explanation: I want to know when an element with class \"column-header\" has been adde

Answer 1

try this...

if($('.column-header')){  
//do something...
} 

or you can also do something like this..it will be more generic

jQuery.exists = function(selector) { return ($(selector).length > 0); }

if ($(selector).exists()) {
  // Do something
}