Learn the entry level basics of animation programming on the HTML5 canvas element using Javascript to perform the animated effect. The 3 basic steps to canvas tag animation programming are (1) Draw your assets (2) Clear the canvas (3) Redraw your assets into a new location or state of being. Your animation speed and fluidity depends on the time interval you set for a setTimeout() or setInterval() method in Javascript. It also depends on the incremental factors of any animations.
<!-- Lesson by Adam Khoury @ www.developphp.com -->
<!-- Watch the video to get code explanation line by line -->
<!-- http://www.youtube.com/watch?v=hUCT4b4wa-8 -->
<!DOCTYPE html>
<html>
<head>
<style type="text/css">
canvas{border:#666 1px solid;}
</style>
<script type="text/javascript">
function draw(x,y){
var canvas = document.getElementById('canvas');
var ctx = canvas.getContext('2d');
ctx.save();
ctx.clearRect(0,0,550,400);
ctx.fillStyle = "rgba(0,200,0,1)";
ctx.fillRect (x, y, 50, 50);
ctx.restore();
x += 1;
var loopTimer = setTimeout('draw('+x+','+y+')',30);
}
</script>
</head>
<body>
<button onclick="draw(0,0)">Draw</button>
<canvas id="canvas" width="550" height="400"></canvas>
</body>
</html>
HTML5 Canvas Animation Basics Tutorial For Beginners