Canvas arcTo() Method
Example
Create an arc between two tangents on the canvas:
JavaScript:
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");
// Start a path
ctx.beginPath();
ctx.moveTo(20, 20);
// Create a horizontal line
ctx.lineTo(100, 20);
// Create an arc
ctx.arcTo(150, 20, 150, 70, 50);
// Create a vertical line
ctx.lineTo(150, 120);
// Draw the path
ctx.stroke();
Try it Yourself »
More examples below.
Description
The arcTo() method adds an arc/curve between two tangents to the path.
Use the stroke() or fill() method to draw the path.
See Also:
The beginPath() Method (Start a new path)
The closePath() Method (Close current path)
The moveTo() Method (Move the path to a point)
The lineTo() Method (Add a line to the path)
The fill() Method (Fill current path)
The stroke() Method (Draw current path)
The arc() Method (Add a circle to the path)
The bezierCurveTo() Method (Add a curve to the path)
The quadraticCurveTo() Method (Add a curve to the path)
Syntax
| context.arcTo(x1, y1, x2, y2, r) |
Parameter Values
| Param | Description | Play it |
|---|---|---|
| x1 | The x-coordinate of the beginning of the arc | Play it » |
| y1 | The y-coordinate of the beginning of the arc | Play it » |
| x2 | The x-coordinate of the end of the arc | Play it » |
| y2 | The y-coordinate of the end of the arc | Play it » |
| r | The radius of the arc | Play it » |
Return Value
| NONE |
More examples
Example
Create an arc between two tangents and fill it:
JavaScript:
const canvas = document.getElementById("myCanvas");
const ctx = canvas.getContext("2d");
// Start a path
ctx.beginPath();
ctx.moveTo(20, 20);
// Create a horizontal line
ctx.lineTo(100, 20);
// Create an arc
ctx.arcTo(150, 20, 150, 70, 50);
// Create a vertical line
ctx.lineTo(150, 120);
// Fill and draw the path
ctx.fill();
Try it Yourself »
Browser Support
The <canvas> element is an HTML5 standard (2014).
arcTo() is supported in all modern browsers:
| Chrome | Edge | Firefox | Safari | Opera | IE |
| Yes | Yes | Yes | Yes | Yes | 9-11 |
❮ Canvas Reference