Check if Function Exists before Calling?

Question

Possible Duplicate:
jQuery test for whether an object has a method?

I want to set if Function Exists before Calling javascript can you help me how do this and apply on this script

$(document).ready(function() {
   $(".cs-text-cut").lettering('words');
});

Answer 1

I'm assuming that you're wanting to check and make sure that lettering exists, try this:

http://api.jquery.com/jQuery.isFunction/

As of jQuery 3.3, jQuery.isFunction() has been deprecated. In most cases, its use can be replaced by typeof x === "function".

Here's an example:

if ( $.isFunction($.fn.lettering) ) {
    $(".cs-text-cut").lettering('words');
}

For jQuery 3.3 and higher use:

if  (typeof $.fn.lettering === "function" ) {
    $(".cs-text-cut").lettering('words');
}