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HTMLCanvasElement: width property

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.

Value

A number.

Examples

Given this <canvas> element:

html

<canvas id="canvas" width="300" height="300"></canvas>

You can get the width of the canvas with the following code:

js

const canvas = document.getElementById("canvas");
console.log(canvas.width); // 300

Specifications

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
width 1 12 1.5 9 9 3 4.4 18 4 10.1 1 1.0

See also

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https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/width