Media Queries

The following is how to run javascript that should only be run on tablets. The idea is that you have a div with a width and height of 0. When you are on a tablet, the media query will set the width to 1px. jQuery will then detect the width of the div and do its thing.

To your html add

<div id="device-detect"></div>

Add to your CSS

#device-detect{
height:0;
width:0;
}
@media only screen and (min-device-width: 768px) and (max-device-width: 1280px){
#device-detect{
width:1px;
} 
}

To your scripts add inside $(document).ready(function() {

if($('#device-detect').css('width') == '1px'){
//tablet-only functions here
};

If anyone knows an alternative or better way, let me know.

—

I used this on Palmer Printing to deliver different js to tablets. Below is the full javascript including how I targeted only phones.

if (document.documentElement.clientWidth > 767) {	//scripts for tablets and desktops
	$(document).ready(function() {
		$('#nav-main .nav').superfish({
			animation: {
				opacity: 'show',
				height: 'show'
			},
			autoArrows: false
		});
		$('#nav-sup .nav').superfish({
			animation: {
				opacity: 'show'
			},
			autoArrows: false
		});
		
		//detect if this is a tablet. In the css is a media query that only tablets will recognize, it will set the width of a div to 1px
		if($('#device-detect').css('width') == '1px'){
			//creates duplicate top level link and adds it to the dropdown
			$('#nav-main ul.nav > li > a').each(function(){
				var newLink = '<li>' + $(this).clone().wrap("<div />").parent().html() + '</li>';
				$(this).next('ul').prepend(newLink);
				$(this).attr('href', 'javascript: void(0)');
			});
		};
		
	});
} else {
	//scripts for phones (width under 768px)
	$(document).ready(function() {
														 
		//disable flash intro on phones (yes I know android can do it, but it breaks the homepage)
		$('.home #flash').css('display','none');
		//show html homepage
		$('.home #non-flash').css({'height':'auto','overflow':'auto'});
														 
		//close all dropdowns											 
		$('ul.nav ul').css('display','none').parent('li').addClass('closed');
		
		//creates duplicate top level link and adds it to the dropdown
		$('#nav-main ul.nav > li > a').each(function(){
			var newLink = '<li>' + $(this).clone().wrap("<div />").parent().html() + '</li>';
			$(this).next('ul').prepend(newLink);
			$(this).attr('href', 'javascript: void(0)');
		});
														 
		//controls the toggling of the dropdowns
		$('ul.nav > li.closed > a').live('click', function(){
			$('ul.nav ul').slideUp('slow').parent('li').removeClass('open').addClass('closed');
			$(this).next('ul').slideDown(300).parent('li').removeClass('closed').addClass('open');
			return false;
		});
		$('ul.nav > li.open > a').live('click', function(){
			$(this).next('ul').slideUp(300).parent('li').removeClass('open').addClass('closed');
			return false;
		});
		
	});
};