Canvas: Difference between revisions
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== Template == | == Template == | ||
A complete HTML page to draw the above figure. | |||
<source lang="javascript"><!DOCTYPE html> | <source lang="javascript"><!DOCTYPE html> | ||
Revision as of 17:06, 25 September 2012
The canvas tag was introduced by Apple and has been standardized to become part of HTML5.
To use it, you add the canvas tag to your HTML page, then use javascript draw on it.
<canvas id="canvas" showsrc> function draw() {
c = document.getElementById("canvas");
p = c.getContext("2d");
p.fillRect(50, 50, 150, 150);
} </canvas>
Template
A complete HTML page to draw the above figure.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<script>
// Define a draw function that contains your
// drawing code
function draw(){
c = document.getElementById("canvas")
//console.log("c is",c)
p = c.getContext("2d")
p.fillRect(50, 50, 150, 150);
}
</script>
</head>
<!-- The body tag then will call draw() when the page has loaded -->
<body onload="draw()">
<canvas id="canvas" width="250" height="250" style="border: 1px solid black"></canvas>
</body>
</html>