CanvasRenderingContext2D: fill() method

{{APIRef("Canvas API")}}

The CanvasRenderingContext2D.fill() method of the Canvas 2D API fills the current or given path with the current {{domxref("CanvasRenderingContext2D.fillStyle", "fillStyle")}}.

Syntax

fill()
fill(path)
fill(fillRule)
fill(path, fillRule)

Parameters

• fillRule

  • : The algorithm by which to determine if a point is inside or outside the filling region. Possible values:
    • nonzero
      • : The non-zero winding rule. Default rule.
    • evenodd
      • : The even-odd winding rule.

• path

  • : A {{domxref("Path2D")}} path to fill.

Return value

None ({{jsxref("undefined")}}).

Examples

Filling a rectangle

This example fills a rectangle with the fill() method.

HTML

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

JavaScript

const canvas = document.getElementById("canvas");
const ctx = canvas.getContext("2d");
ctx.rect(10, 10, 150, 100);
ctx.fill();

Result

{{ EmbedLiveSample('Filling_a_rectangle', 700, 180) }}

Specifying a path and a fillRule

This example saves some intersecting lines to a Path2D object. The fill() method is then used to render the object to the canvas. A hole is left unfilled in the object's center by using the "evenodd" rule; by default (with the "nonzero" rule), the hole would also be filled.

HTML

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

JavaScript

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

// Create path
let region = new Path2D();
region.moveTo(30, 90);
region.lineTo(110, 20);
region.lineTo(240, 130);
region.lineTo(60, 130);
region.lineTo(190, 20);
region.lineTo(270, 90);
region.closePath();

// Fill path
ctx.fillStyle = "green";
ctx.fill(region, "evenodd");

Result

{{ EmbedLiveSample('Specifying_a_path_and_a_fillRule', 700, 180) }}

Specifications

{{Specifications}}

Browser compatibility

{{Compat}}

See also

• The interface defining this method: {{domxref("CanvasRenderingContext2D")}}
• {{domxref("CanvasRenderingContext2D.fillStyle")}}