CanvasRenderingContext2D.createConicGradient()

The CanvasRenderingContext2D.createConicGradient() method of the Canvas 2D API creates a gradient around a point with given coordinates.

This method returns a conic CanvasGradient. To be applied to a shape, the gradient must first be assigned to the fillStyle or strokeStyle properties.

Note: Gradient coordinates are global, i.e., relative to the current coordinate space. When applied to a shape, the coordinates are NOT relative to the shape's coordinates.

Syntax

createConicGradient(startAngle, x, y)

Parameters

startAngle

The angle at which to begin the gradient, in radians. Angle measurements start vertically above the center and move around clockwise.

x

The x-axis coordinate of the center of the gradient.

y

The y-axis coordinate of the center of the gradient.

Return value

CanvasGradient

A conic CanvasGradient.

Examples

Filling a rectangle with a conic gradient

This example initializes a conic gradient using the createConicGradient() method. Five color stops between around the center coordinate are then created. Finally, the gradient is assigned to the canvas context, and is rendered to a filled rectangle.

HTML

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

JavaScript

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");

// Create a conic gradient
// The start angle is 0
// The center position is 100, 100
const gradient = ctx.createConicGradient(0, 100, 100);

// Add five color stops
gradient.addColorStop(0, "red");
gradient.addColorStop(0.25, "orange");
gradient.addColorStop(0.5, "yellow");
gradient.addColorStop(0.75, "green");
gradient.addColorStop(1, "blue");

// Set the fill style and draw a rectangle
ctx.fillStyle = gradient;
ctx.fillRect(20, 20, 200, 200);

Rectangle result

Specifications

Specification
HTML Standard
# dom-context-2d-createconicgradient-dev

Browser compatibility

BCD tables only load in the browser

See also