The CanvasRenderingContext2D.createLinearGradient() method of the Canvas 2D API creates a gradient along the line connecting two given coordinates.

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

createLinearGradient(x0, y0, x1, y1)

The createLinearGradient() method is specified by four parameters defining the start and end points of the gradient line.

x0

The x-axis coordinate of the start point.

y0

The y-axis coordinate of the start point.

x1

The x-axis coordinate of the end point.

y1

The y-axis coordinate of the end point.

A linear CanvasGradient initialized with the specified line.

NotSupportedError DOMException

Thrown when non-finite values are passed as parameters.

This example initializes a linear gradient using the createLinearGradient() method. Three color stops between the gradient's start and end points 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 linear gradient
// The start gradient point is at x=20, y=0
// The end gradient point is at x=220, y=0
const gradient = ctx.createLinearGradient(20, 0, 220, 0);

// Add three color stops
gradient.addColorStop(0, "green");
gradient.addColorStop(0.5, "cyan");
gradient.addColorStop(1, "green");

// Set the fill style and draw a rectangle
ctx.fillStyle = gradient;
ctx.fillRect(20, 20, 200, 100);

Result

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