The read-only WebGLRenderingContext.drawingBufferWidth property represents the actual width of the current drawing buffer. It should match the width attribute of the <canvas> element associated with this context, but might differ if the implementation is not able to provide the requested width.




Given this <canvas> element:

<canvas id="canvas"></canvas>

You can get the width of the drawing buffer with the following lines:

var canvas = document.getElementById("canvas");
var gl = canvas.getContext("webgl");
gl.drawingBufferWidth; // 300


Specification Status Comment
WebGL 1.0
The definition of 'WebGLRenderingContext.drawingBufferWidth' in that specification.
Recommendation Initial definition.

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 9 9.0 (9.0) 11 12 5.1
Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) 25 9.0 (9.0) (Yes) 12 8.1

See also

Document Tags and Contributors

 Contributors to this page: fscholz
 Last updated by: fscholz,