clearRect
Clears the specified rectangle to transparent black—RGBa(0,0,0,0).
Declaration
void clearRect(
unrestricted float x,
unrestricted float y,
unrestricted float width,
unrestricted float height
);Parameters
- x:
The x-coordinate of the left edge of the rectangle, in pixels from the left edge of the canvas coordinate system.
- y:
The y-coordinate of the top of the rectangle, in pixels from the top of the canvas coordinate system.
- width:
The width of the rectangle, in pixels.
- height:
The height of the rectangle, in pixels.
Discussion
All parameter values are in the canvas’s current coordinate system, subject to the current transformation matrix.