Web/API/CanvasRenderingContext2D/resetTransform

This is an experimental technologyCheck the Browser compatibility table carefully before using this in production.

The CanvasRenderingContext2D.resetTransform() method of the Canvas 2D API resets the current transform to the identity matrix.

Syntax

void ctx.resetTransform();

Examples

Resetting the matrix

This example draws a rotated rectangle after modifying the matrix, and then resets the matrix using the resetTransform() method.

HTML

<canvas id="canvas"></canvas>

JavaScript

The rotate() method rotates the transformation matrix by 45°. The fillRect() method draws a filled rectangle, adjusted according to that matrix.

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

// Draw a rotated rectangle
ctx.rotate(45 * Math.PI / 180);
ctx.fillRect(60, 0, 100, 30);

// Reset transformation matrix to the identity matrix
ctx.resetTransform();

Continuing with a regular matrix

Whenever you're done drawing transformed shapes, you should call resetTransform() before rendering anything else. In this example, the first two shapes are drawn with a skew transformation, and the last two are drawn with the identity (regular) transformation.

HTML

<canvas id="canvas"></canvas>

JavaScript

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');

// Skewed rectangles
ctx.transform(1, 0, 1.7, 1, 0, 0);
ctx.fillStyle = 'gray';
ctx.fillRect(40, 40, 50, 20);
ctx.fillRect(40, 90, 50, 20);

// Non-skewed rectangles
ctx.resetTransform();
ctx.fillStyle = 'red';
ctx.fillRect(40, 40, 50, 20);
ctx.fillRect(40, 90, 50, 20);

Result

The skewed rectangles are gray, and the non-skewed rectangles are red.

Polyfill

You can also use the setTransform() method to reset the current transform to the identity matrix, like so:

ctx.setTransform(1, 0, 0, 1, 0, 0);

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'CanvasRenderingContext2D.resetTransform' in that specification.	Living Standard

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
resetTransform Experimental'	Chrome Full support 31	Edge Full support 79	Firefox Full support 36	IE No support No	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 36	Opera Android No support No	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

No support  

No support

Experimental. Expect behavior to change in the future.'

Experimental. Expect behavior to change in the future.

See also

• The interface defining this method: CanvasRenderingContext2D

CanvasRenderingContext2D.resetTransform() by Mozilla Contributors is licensed under CC-BY-SA 2.5.