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


ctx.shadowOffsetX = offset;
A float specifying the distance that the shadow will be offset in horizontal distance. The default value is 0. Infinity or NaN values are ignored.


Using the shadowOffsetX property

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


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


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

ctx.shadowColor = 'black';
ctx.shadowOffsetX = 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:


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

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)
Feature Android Chrome for Android Edge Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

See also

Document Tags and Contributors

 Contributors to this page: nmve, erikadoyle, NIPE-SYSTEMS, fscholz
 Last updated by: nmve,