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()...
You can use jQuery, hook onto $(document).scroll(). Whenever the scrollTop passes a certain threshold, make it smooth scroll down to the end point.
ReplyDelete$(document).scroll(function() {
if ($(document).scrollTop() > ####) {
smoothScrollTo(###);
}
});
Ok so I would use setTimout to check the scroll position every so often and then if the scroll position is right, scare the user or whatever you are planning:
ReplyDeletevar checkScroll = function() {
if(window.scrollY > 1000) {
setTimeout(checkScroll, 100);
}
else {
doSomeScaryStuff()
}
}
// need to call it manually the first time
checkScroll();
make sense?
Detect the current position of the top of the window using http://api.jquery.com/scrollTop/ and the window element, and use the same method combined with .animate() to smooth scroll down.
ReplyDeleteHope that helps!