CanvasRenderingContext2D: shadowOffsetX property
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The
CanvasRenderingContext2D.shadowOffsetX
property of the Canvas 2D API specifies the distance that shadows will be offset
horizontally.
Note:
Shadows are only drawn if the
shadowColor property is set to
a non-transparent value. One of the shadowBlur, shadowOffsetX, or
shadowOffsetY properties must
be non-zero, as well.
Value
A float specifying the distance that shadows will be offset horizontally. Positive values are to the right, and negative to the left. The default value is 0 (no horizontal offset). Infinity and NaN values are ignored.
Examples
Moving a shadow horizontally
This example adds a blurred shadow to a rectangle. The
shadowColor property sets its
color, shadowOffsetX sets its offset 25 units to the right, and
shadowBlur gives it a blur level
of 10.
HTML
<canvas id="canvas"></canvas>
JavaScript
const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
// Shadow
ctx.shadowColor = "red";
ctx.shadowOffsetX = 25;
ctx.shadowBlur = 10;
// Rectangle
ctx.fillStyle = "blue";
ctx.fillRect(20, 20, 150, 100);
Result
Specifications
| Specification |
|---|
| HTML # dom-context-2d-shadowoffsetx-dev |
Browser compatibility
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See also
- The interface defining this property:
CanvasRenderingContext2D CanvasRenderingContext2D.shadowOffsetYCanvasRenderingContext2D.shadowColorCanvasRenderingContext2D.shadowBlur