December 2013
Beginner
122 pages
2h 43m
English
Content preview from RaphaelJS
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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.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.
Chapter 2. Shapes
In the introduction, we looked at a complete working example of Raphael that drew a red dot on the page. Since Raphael is a fundamentally visual toolkit, this will take the place of the canonical “Hello World” example in the first chapter of programming books since time immemorial.
In case, like me, you never read the introduction, here it is again.
<!DOCTYPE html><html><head><title>Red dot</title></head><body><divid="container"></div><scriptsrc="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael-min.js"></script><script>varpaper=Raphael("container",500,300);vardot=paper.circle(250,150,100).attr({fill:"#FF0000",stroke:"#000099","stroke-width":3});</script></body></html>
See this code live on jsFiddle.
Let’s do a deep dive into this example.
Getting Raphael
Like jQuery, Google Maps, Backbone, or any other JavaScript library, Raphael is neatly packed in a single external library that you include in your webpage with a <script> tag:
<script src="http://cdnjs.cloudflare.com/ajax/libs/raphael/2.1.0/raphael- min.js"></script>
CloudFlare is a cloud services company that generously provides a free CDN, or “content delivery network,” for fast, highly available access to Raphael (and many other JavaScript libraries). I’m using it here because it prevents me from needing to say things like “first download the Raphael script, then put it in same ...
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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.