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Canvas scale() Method

❮ Canvas Reference

Example

Draw a rectangle, scale to 200%, then draw rectangle again:

YourbrowserdoesnotsupporttheHTML5canvastag.

JavaScript:

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

ctx.strokeRect(5, 5, 25, 15);
ctx.scale(2, 2);
ctx.strokeRect(5, 5, 25, 15);
Try it Yourself »

More examples below.


Description

The scale() method scales the current context.

Note

If you scale a context, all future drawings will be scaled. If you scale(2,2), drawings will be positioned twice as far from the 0,0 position of the canvas as you specify.

See Also:

The rotate() Method (Rotate the context)

The translate() Method (Remap the 0,0 position)

The transform() Method (Scale, rotate, move, skew context)

The setTransform() Method (Scale, rotate, move, skew context).


Syntax

context.scale(scalewidth, scaleheight)

Parameter Values

Param Description Play it
scalewidth Scales the width (1=100%, 0.5=50%, 2=200%) Play it »
scaleheight Scales the height (1=100%, 0.5=50%, 2=200%) Play it »

Return Value

NONE


More Examples

Example

Draw a rectangle, scale to 200%, draw rectangle again, scale to 200%, draw rectangle again, scale to 200%, draw rectangle again:

YourbrowserdoesnotsupporttheHTMLcanvastag.

JavaScript:

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

ctx.strokeRect(5, 5, 25, 15);
ctx.scale(2, 2);
ctx.strokeRect(5, 5, 25, 15);
ctx.scale(2, 2);
ctx.strokeRect(5, 5, 25, 15);
ctx.scale(2, 2);
ctx.strokeRect(5, 5, 25, 15);
Try it Yourself »

Browser Support

The <canvas> element is an HTML5 standard (2014).

scale() is supported in all modern browsers:

Chrome Edge Firefox Safari Opera IE
Yes Yes Yes Yes Yes 9-11

❮ Canvas Reference
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