JQuery Tips
1. Optimize performance of complex selectors
var subset = $("");
$("input[value^=]", subset);
2. Set Context and improve the performance
On the core jQuery function, specify the context parameter when. Specifying the context parameter allows jQuery to start from a deeper branch in the DOM, rather than from the DOM root. Given a large enough DOM, specifying the context parameter should translate to performance gains.
$("input:radio", document.forms[0]);
3. Live Event Handlers
Set an event handler for any element that matches a selector, even if it gets added to the DOM after the initial page load:
$('button.someClass').live('click', someFunction);
4. To show / hide element
$("a").hide();
$("a").show();
5. Check element exists
if ($("#someDiv").length) {
}
6. Back to top button/link
$('#top').click(function() {
$(document).scrollTo(0,500); }