I have a HTML list of about 500 items and a "filter" box above it. I started by using jQuery to filter the list when I typed a letter (timing code added later): $('#filter').keyup( function() { var jqStart = (new Date).getTime(); var search = $(this).val().toLowerCase(); var $list = $('ul.ablist > li'); $list.each( function() { if ( $(this).text().toLowerCase().indexOf(search) === -1 ) $(this).hide(); else $(this).show(); } ); console.log('Time: ' + ((new Date).getTime() - jqStart)); } ); However, there was a couple of seconds delay after typing each letter (particularly the first letter). So I thought it may be slightly quicker if I used plain Javascript (I read recently that jQuery's each function is particularly slow). Here's my JS equivalent: document.getElementById('filter').addEventListener( 'keyup', function () { var jsStart = (new Date).getTime()...
jQuery dimension functions
ReplyDelete$(window).width() and $(window).height()
If you aren't using jQuery, it gets ugly. Here's a snippet that should work on all new browsers. The behavior is different in Quirks mode and standards mode in IE. This takes care of it.
ReplyDeletevar elem = (document.compatMode === "CSS1Compat") ?
document.documentElement :
document.body;
var height = elem.clientHeight;
var width = elem.clientWidth;
You can use the window.innerWidth and window.innerHeight properties.
ReplyDeleteSee: responsejs.com/labs/dimensions/
ReplyDelete// pure JavaScript
var viewportWidth = document.documentElement.clientWidth
, viewportHeight = document.documentElement.clientHeight
;
// jQuery
var viewportWidth = $(window).width()
, viewportHeight = $(window).height()
;
// hybrid
var viewportWidth = document.documentElement.clientWidth || $(window).width()
, viewportHeight = document.documentElement.clientHeight || $(window).height()
;