HTML canvas clearRect() Method
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);
Try it Yourself »
Browser Support
The numbers in the table specify the first browser version that fully supports the method.
| Method | |||||
|---|---|---|---|---|---|
| clearRect() | 4.0 | 9.0 | 3.6 | 4.0 | 10.1 |
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 » |
❮ Canvas Object
