CanvasRenderingContext2D.resetTransform()

This is an experimental technology
Check 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 Standard
The definition of 'CanvasRenderingContext2D.resetTransform' in that specification.
Living Standard

Browser compatibility

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 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.