Editing Coding JQuery Plugins (section)

==Plugins that return a value==
<syntaxhighlight lang="javascript">
$.fn.totalWidth() {
	var w = 0;
	this.each(function() {
		w += $(this).width();
	});
	return(w);
}
</syntaxhighlight>
Then call the custom JQuery routine like this, which would return the total width of all the DIVS within the document:
<syntaxhighlight lang="javascript">
$('div').totalWidth();
</syntaxhighlight>
Some things to note about the example above:
*<code>this</code> refers to all the elements that match the selector.
*Within the <code>$.each()</code> function, <code>$(this)</code> refers to the current single element in the list of elements that match the selector. 
*Declare and return the value outside the <code>$.each()</code> routine.