<canvas>

Summary

The HTML <canvas> Element can be used to draw graphics via scripting (usually JavaScript). For example, it can be used to draw graphs, make photo compositions or even perform animations. You may (and should) provide alternate content inside the <canvas> block. That content will be rendered both on older browsers that don't support canvas and in browsers with JavaScript disabled.

For more articles on canvas, see the canvas topic page.

Attributes

This element includes the global attributes.

width
The width of the coordinate space in CSS pixels. Defaults to 300.
height
The height of the coordinate space in CSS pixels. Defaults to 150.

Note: The displayed size of the canvas can be changed using a stylesheet. The image is scaled during rendering to fit the styled size.

Examples

<canvas id="canvas" width="300" height="300">
  Sorry, your browser doesn't support the &lt;canvas&gt; element.
</canvas>

Specifications

Specification Status Comment
WHATWG HTML Living Standard Living Standard  
HTML5 Candidate Recommendation  

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.5 (1.8) 9.0 9.0 2.0
Feature Firefox Mobile (Gecko) Android IE Mobile Opera Mobile Safari Mobile
Basic support 1.0 (1.8) ? ? ? 1.0

Browser-specific notes

Firefox (Gecko)

  • Before Gecko 5.0 (Firefox 5.0 / Thunderbird 5.0 / SeaMonkey 2.2), the canvas width and height were signed integers instead of unsigned integers.
  • Prior to Gecko 6.0 (Firefox 6.0 / Thunderbird 6.0 / SeaMonkey 2.3), a <canvas> element with a zero width or height would be rendered as if it had default dimensions.
  • Before Gecko 12.0 (Firefox 12.0 / Thunderbird 12.0 / SeaMonkey 2.9), if JavaScript is disabled, the <canvas> element was being rendered instead of showing the fallback content as per the specification. Now the fallback content is rendered instead.

See also