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I've followed tutorials regarding creating a canvas, however it is not working and neither is the rectangle drawn on it. Is it a necessity to have the script in the <head>? Any help would be appreciated!
Here's a JSFiddle with my code.
<!DOCTYPE html>
<html>
<head>
<title>Simple animations in HTML5</title>
</head>
<body>
<h2> Optical Illusion </h2>
<video id="illusion" width="640" height="480" controls>
<source src="Illusion_movie.ogg">
</video>
<div id="buttonbar">
<button onclick="changeSize()">Big/Small</button>
</div>
<p>
Watch the animation for 1 minute, staring at the centre of the image. Then look at something else near you.
For a few seconds everything will appear to distort.
Source: <a href="http://en.wikipedia.org/wiki/File:Illusion_movie.ogg">Wikipedia:Illusion movie</a>
</p>
<script>
var myVideo=document.getElementById("illusion");
var littleSize = false;
function changeSize()
{
myVideo.width = littleSize ? 800 : 400;
littleSize = !littleSize;//toggle boolean
}
</script>
<canvas id= "myCanvas " width= "500 " height= "500 ">
style="border:1px solid #000000;">
</canvas>
<script>
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.fillStyle = "blue";
context.fillRect(20, 50, 200, 100);
</script>
</body>
</html>
505
I've cleaned up your code you had a few spaces that were causing problems.
Also when you use the script tag set the type attribute:
<script type="text/javascript">
// your code here
</script>
Here's a corrected Fiddle: http://jsfiddle.net/8bK4y/
Edit: As pointed out below type attribute is not needed for the HTML5 Doctype.
96
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