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clearRect method

Clears the pixels on a CanvasRenderingContext2D object within a given rectangle.

HTML Canvas 2D Context, Section 8Internet Explorer 9

 

Syntax


object.clearRect(x, y, w, h);

Parameters

x [in]

Type: number

The x-coordinate, in pixels, of the upper-left corner of the rectangle in relation to the coordinates of the canvas.

y [in]

Type: number

The x-coordinate, in pixels, of the upper-left corner of the rectangle in relation to the coordinates of the canvas.

w [in]

Type: number

The width, in pixels, of the rectangle in relation to the coordinates of the canvas.

h [in]

Type: number

The height, in pixels, of the rectangle in relation to the coordinates of the canvas.

Return value

This method does not return a value.

Standards information

Remarks

The ICanvasRenderingContext2D::clearRect method clears the canvas to transparent black (that is, each pixel's RGBA value is equal to zero). To clear to a specific color, use the ICanvasRenderingContext2D::fillRect method.

See also

ICanvasRenderingContext2D::fillRect

 

 

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