HTML <canvas> width Attribute

❮ HTML <canvas> tag

Example

A <canvas> element with a height and width of 200 pixels:

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Definition and Usage

The width attribute specifies the width of the <canvas> element, in pixels.

Tip: Use the height attribute to specify the height of the <canvas> element, in pixels.

Tip: Each time the height or width of a canvas is re-set, the canvas content will be cleared (see example at bottom of page).

Tip: Learn more about the <canvas> element in our HTML Canvas Tutorial.

Browser Support

The numbers in the table specify the first browser version that fully supports the attribute.

Attribute
width	4.0	9.0	2.0	3.1	9.0

Syntax

Attribute Values

Value	Description
pixels	Specifies the width of the canvas, in pixels (e.g. "100"). Default value is 300

More Examples

Example

Clear the canvas by setting the width attribute to 400px (using JavaScript):

<canvas id="myCanvas" width="200" height="200" style="border:1px solid"></canvas>

<script>
let c = document.getElementById("myCanvas");
let ctx = c.getContext("2d");
ctx.fillStyle = "#92B901";
ctx.fillRect(50, 50, 100, 100);

function clearCanvas() {
c.width = 400;
}
</script>

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❮ HTML <canvas> tag