October 1999
Intermediate to advanced
480 pages
14h 47m
English
Content preview from JavaScript Application CookbookBecome 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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navbar.js
- Practical use
Dynamic page navigation
- Version requirement
JavaScript 1.1
- Function
navbar()
This source file contains only one function, but it’s a good one. Suppose you have on your web site several pages of content, each with a navigation bar of links to all the other pages. Wouldn’t it be great if JavaScript could make a smart nav bar that included links to all other pages on the site except the one currently loaded? Figure 6.12 shows ch06\astronomy.html. The nav bar contains links to the other pages on the site: Other Sciences, Sports, Musicians’ Corner, and Cool People. Figure 6.13 shows the document that loads after following the People link. Now look at the nav bar: Astronomy, Other Sciences, Sports, and Musicians’ Corner. There’s no link for People because it’s already loaded. You can do this for as many pages as you like, and if documents change, you need to make changes only in navbar.js. This will save plenty of time.
The code for this is surprisingly basic. Just populate array
navURLs with the filenames of your web pages,
and array linkText with the text you want to
display in your links. Function navbar()
iterates
through all the filenames and generates a link with corresponding
text for all those that do not appear in the location.href
property of the current document. It’s that easy.
Check out the code in Example 6.8.
Example 6-8. navbar.js
1 var navURLs = new Array('astronomy.html', 'science.html', 'sports.html', 2 'music.htm', 'people.htm'); 3 var linkText ...Become 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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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.