August 2013
Beginner
70 pages
1h 26m
English
Content preview from Instant jQuery SelectorsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Improving performance re-using selected elements (Become an expert)
In this recipe, we'll see how we can store a collection of previously selected elements in a variable for a later processing and how this method can improve performance.
How to do it...
This time our goal will be a little different. Instead of applying margins or borders, we'll perform a comparison to show how in a (simulation of a) real-world page, caching objects can significantly improve performance. In order to understand the explanation, follow these steps:
- Create a copy of the
template.htmlfile and rename it asreusing-elements.html. - Edit the
<head>section of the page adding this code:<script> $(document).ready(function() { var start = new Date(); var $description = $('.description'); ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.