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HTML <canvas> width Attribute

HTML canvas Tag Reference HTML <canvas> tag

Example

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

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

Try it yourself »

More "Try it Yourself" examples below.


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


Differences Between HTML 4.01 and HTML5

The <canvas> tag is new in HTML5.


Syntax

<canvas width="pixels">

Attribute Values

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


Examples

More Examples

Example

Clear the canvas by setting the width or height attribute (using JavaScript):

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

<script>

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

function clearCanvas() {
    c.height = 300;
}

</script>

Try it yourself »


HTML canvas Tag Reference HTML <canvas> tag

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