CanvasRenderingContext2D.shadowOffsetY

The CanvasRenderingContext2D.shadowOffsetY property of the Canvas 2D API specifies the distance that the shadow will be offset in vertical distance.

Syntax

ctx.shadowOffsetY = offset;

offset

A float specifying the distance that the shadow will be offset in vertical distance. The default value is 0. Infinity or NaN values are ignored.

Examples

Using the shadowOffsetY property

This is just a simple code snippet using the shadowOffsetY property to set a shadow with a vertical offset. Note that shadows are only drawn, if the shadowColor property is set to a non-transparent value, too.

HTML

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

JavaScript

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

ctx.shadowColor = 'black';
ctx.shadowOffsetY = 10;
ctx.shadowBlur = 10;

ctx.fillStyle = 'green';
ctx.fillRect(10, 10, 100, 100);

Edit the code below and see your changes update live in the canvas:

Specifications

Specification	Status	Comment
WHATWG HTML Living Standard The definition of 'CanvasRenderingContext2D.shadowOffsetY' in that specification.	Living Standard

Browser compatibility

See also

• The interface defining it, CanvasRenderingContext2D.
• CanvasRenderingContext2D.shadowOffsetX
• CanvasRenderingContext2D.shadowColor
• CanvasRenderingContext2D.shadowBlur