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The HTMLCanvasElement.width property is a positive integer reflecting the width HTML attribute of the <canvas> element interpreted in CSS pixels. When the attribute is not specified, or if it is set to an invalid value, like a negative, the default value of 300 is used.
This is one of the two properties, the other being HTMLCanvasElement.height, that controls the size of the canvas.
Syntax
var pxl = canvas.width; canvas.width = pxl;
Examples
Given this <canvas> element:
<canvas id="canvas" width="300" height="300"></canvas>
You can get the width of the canvas with the following code:
var canvas = document.getElementById("canvas");
console.log(canvas.width); // 300
Specifications
| Specification | Status | Comment |
|---|---|---|
| WHATWG HTML Living Standard The definition of 'HTMLCanvasElement.width' in that specification. |
Living Standard | No change since the latest snapshot, HTML5 |
| HTML5.1 The definition of 'HTMLCanvasElement.width' in that specification. |
Working Draft | |
| HTML5 The definition of 'HTMLCanvasElement.width' in that specification. |
Recommendation | Snapshot of the WHATWG HTML Living Standard containing the initial definition. |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | 4 | 3.6 (1.9.2) | 9 | 9 | 3.1 |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | (Yes) | (Yes) | 1.0 (1.9.2) | (Yes) | (Yes) | (Yes) |
See also
- The interface defining it,
HTMLCanvasElement. - The other property controlling the size of the canvas,
HTMLCanvasElement.height.