Web/API/CanvasRenderingContext2D/rect

The CanvasRenderingContext2D.rect() method of the Canvas 2D API adds a rectangle to the current path.

Like other methods that modify the current path, this method does not directly render anything. To draw the rectangle onto a canvas, you can use the fill() or stroke() methods.

Note: To both create and render a rectangle in one step, use the fillRect() or strokeRect() methods.

Syntax

void ctx.rect(x, y, width, height);

The rect() method creates a rectangular path whose starting point is at (x, y) and whose size is specified by width and height.

Parameters

x: The x-axis coordinate of the rectangle's starting point.
y: The y-axis coordinate of the rectangle's starting point.
width: The rectangle's width. Positive values are to the right, and negative to the left.
height: The rectangle's height. Positive values are down, and negative are up.

Examples

Drawing a rectangle

This example creates a rectangular path using the rect() method. The path is then rendered using the fill() method.

HTML

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

JavaScript

The rectangle's corner is located at (10, 20). It has a width of 150 and a height of 100.

const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
ctx.rect(10, 20, 150, 100);
ctx.fill();

Result

Specifications

Specification	Status	Comment
HTML Living StandardThe definition of 'CanvasRenderingContext2D.rect' 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	Safari on iOS	Samsung Internet
`rect`	Chrome Full support 1	Edge Full support 12	Firefox Full support 1.5	IE Full support 9	Opera Full support 11.6	Safari Full support 2	WebView Android Full support 1	Chrome Android Full support 18	Firefox Android Full support 4	Opera Android Full support 12	Safari iOS Full support 1	Samsung Internet Android Full support 1.0

Legend

Full support: Full support