extending jquery on the main element object

I've seen some jquery code where people extend the main object like:

 $('someId').myCustomObject();

Is this possible or am I mistaken? (if yes, how?)

From stackoverflow

• I believe what you're looking for is jQuery.fn.extend:

  jQuery.fn.extend

• Yes it's easily possible. The standard pattern for building extensions is:

  (function($) {
  
    $.fn.myCustomObject = function(options) {
      var defaults = { ... };
      var opts = $.extend(defaults, options);
  
      this.each(function(i) {
  
        ... // Act on each item, $(this).
        ... // Use opts.blah to read merged options.
  
      });
    };
  
  })(jQuery);
  

  This allows you to use '$' in the plug-in, yet allows compatibility mode.

  chipotle_warrior : That's the right pattern, except `this` is already a jQuery object, so you can call `this.each()` without wrapping it in the jQuery function.

  stusmith : Oopsies, my bad. I'll fix it. Cheers.