Canvas clearRect() method
Definition and usage
clearRect() The method clears the specified pixels within the given rectangle.
Example
Clear a rectangle within a given rectangle:
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);
Syntax
context.clearRect(x,y,width,height);
Parameter value
| Parameter | Description |
|---|---|
| x | The x-coordinate of the top-left corner of the rectangle to be cleared |
| y | The y-coordinate of the top-left corner of the rectangle to be cleared |
| width | The width of the rectangle to be cleared, in pixels |
| height | The height of the rectangle to be cleared, in pixels |
Browser Support
The numbers in the table indicate the first browser version that fully supports this property.
| Chrome | Edge | Firefox | Safari | Opera |
|---|---|---|---|---|
| Chrome | Edge | Firefox | Safari | Opera |
| 4.0 | 9.0 | 3.6 | 4.0 | 10.1 |
Note:Internet Explorer 8 and earlier versions do not support the <canvas> element.
