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.
A number.
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
| Specification |
|---|
| HTML Standard # dom-canvas-height |
| 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 |
HTMLCanvasElement: Interface used to define the HTMLCanvasElement.width propertyHTMLCanvasElement.height: Other property used to control the size of the canvas© 2005–2023 MDN contributors.
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/width