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,
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.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.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.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.
How to have efficient selectors (Become an expert)
Throughout the book, I've given several hints to improve performances. This recipe will reinforce some of them and add other useful tips and tricks to improve the performance of your website by simply selecting elements in the right way.
How to do it...
To boost the performances, keep in mind the following points:
- Don't use the Universal selector (explicitly or implicitly). Never! Seriously!
- The best selectors are the Id, Class and Element selectors, because under the hood jQuery uses native JavaScript functions.
- The best performances are achieved using the ID selector.
- Never prepend a tag name before an id, it'll slow down the selector. For example, don't turn
$('#content')into$('div#content').
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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.
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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.