July 2013
Beginner
150 pages
3h 29m
English
Content preview from Jump Start JavaScript
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Chapter 8Canvas
This chapter introduces the <canvas> element, which is part of the HTML5
specification. We’ll be using <canvas> to implement a productivity chart
for our example application. The chart will update each time the data is
changed. This will show the user how many tasks have been completed and how
many remain unfinished. We’ll also add some shadowing and gradient effects
to give our charts a more polished look.
What is Canvas?
The official specification states: “The canvas element provides scripts with a resolution-dependent bitmap canvas, which can be used for rendering graphs, game graphics, art, or other visual images on the fly.” Although the specification does not mandate an actual scripting language, JavaScript is generally ...
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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.