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CanvasRenderingContext2D.shadowOffsetY

The CanvasRenderingContext2D.shadowOffsetY property of the Canvas 2D API specifies the distance that shadows will be offset vertically.

Syntax

ctx.shadowOffsetY = offset;
offset
A float specifying the distance that shadows will be offset vertically. The default value is 0. Infinity and NaN values are ignored.

Examples

Using the shadowOffsetY property

This example uses the shadowOffsetY property to apply a vertical offset to a shadow. Note that shadows are only drawn if the shadowColor property is set to a non-transparent value, as well.

HTML

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

JavaScript

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

ctx.shadowColor = 'red';
ctx.shadowOffsetY = 25;
ctx.shadowBlur = 10;

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

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

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support Yes 12 Yes Yes Yes Yes
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support Yes Yes Yes Yes Yes Yes Yes

See also

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/shadowOffsetY