Canvas rect() method
Definition and usage
rect() The method creates a rectangle.
Tip:Please use stroke() or fill() The method actually draws a rectangle on the canvas.
Example
Example 1
Draw a 150*100 pixel rectangle:
JavaScript:
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
ctx.rect(20,20,150,100);
ctx.stroke();
Syntax
context.rect(x,y,width,height);
Parameter value
| Parameter | Description |
|---|---|
| x | The x coordinate of the top-left corner of the rectangle. |
| y | The y coordinate of the top-left corner of the rectangle. |
| width | The width of the rectangle, in pixels. |
| height | The height of the rectangle, in pixels. |
More examples
Example 2
Create three rectangles using the rect() method:
JavaScript:
JavaScript:
var c=document.getElementById("myCanvas");
var ctx=c.getContext("2d");
// Red rectangle
ctx.beginPath();
ctx.lineWidth="6";
ctx.strokeStyle="red";
ctx.rect(5,5,290,140);
ctx.stroke();
// Green rectangle
ctx.beginPath();
ctx.lineWidth="4";
ctx.strokeStyle="green";
ctx.rect(30,30,50,50);
ctx.stroke();
// Blue rectangle
ctx.beginPath();
ctx.lineWidth="10";
ctx.strokeStyle="blue";
ctx.rect(50,50,150,80);
ctx.stroke();
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.
