HTML canvas clearRect() Method

HTML canvas Reference HTML Canvas Reference

Example

Clear a rectangle within a given rectangle:

YourbrowserdoesnotsupporttheHTML5canvastag.

JavaScript:

var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.fillStyle="red";
ctx.fillRect(0,0,300,150);
ctx.clearRect(20,20,100,50);

Try it yourself »

Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

Internet Explorer 9, Firefox, Opera, Chrome, and Safari support the clearRect() method.

Note: Internet Explorer 8 and earlier versions, do not support the <canvas> element.


Definition and Usage

The clearRect() method clears the specified pixels within a given rectangle.

JavaScript syntax: context.clearRect(x,y,width,height);

Parameter Values

Parameter Description Play it
x The x-coordinate of the upper-left corner of the rectangle to clear Play it »
y The y-coordinate of the upper-left corner of the rectangle to clear Play it »
width The width of the rectangle to clear, in pixels Play it »
height The height of the rectangle to clear, in pixels Play it »

HTML canvas Reference HTML Canvas Reference

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