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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Context matters (Should know)
So far I've mentioned vaguely something called context that can be used during a selection. This recipe illustrates how and why we use the second parameter of jQuery, context.
How to do it...
Our goal is to apply a border to all of the <li> descendants of an element having ID content, using the context parameter. Perform the following steps:
- Create a copy of the
child-filters.htmlfile and rename it ascontext-matters.html. - Edit the
<head>section of the page adding this code:<script> $(document).ready(function() { $('li', '#content').css('border', '2px solid #000000'); }); </script> - Save the file and open it with your favorite browser.
How it works...
This recipe is very simple because I want you to focus on the consequences ...
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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.
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.