October 2010
Intermediate to advanced
456 pages
10h 16m
English
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Approach 4: Loading Javascript without blocking
The idea behind this approach is to load all (or almost all) script files without blocking rendering of the page. That puts the rendered page sooner in front of the visitor.
There are a couple of ways to achieve this, each trading off more work for a better visitor experience:
- Moving all
<script>tags to the end of the page - Separating user interface code and render code
- Introducing page loading indicator
- Loading code in parallel with the page
Let's go through each of them.
Moving all <script> tags to the end of the page
On a basic level, loading JavaScript code without blocking page rendering is really easy to accomplish—simply take your script tags out of the head of the page, and move them to the end ...
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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.