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.

Syntax

CanvasGradient ctx.createConicGradient(startAngle, x, y);

Parameters

startAngle

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

x

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

y

The y-axis coordinate of the centre 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

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

// Create a conic gradient
// The start angle is 0
// The centre position is 100, 100
var 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

Browser compatibility

See also

• The interface defining this method: CanvasRenderingContext2D
• CanvasGradient
• CanvasRenderingContext2D.createLinearGradient()
• CanvasRenderingContext2D.createRadialGradient()