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HTML canvas bezierCurveTo() Method

❮ HTML Canvas Reference


Draw a cubic Bézier curve:



var c = document.getElementById("myCanvas");
var ctx = c.getContext("2d");
ctx.moveTo(20, 20);
ctx.bezierCurveTo(20, 100, 200, 100, 200, 20);
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Browser Support

Internet Explorer Firefox Opera Google Chrome Safari

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

Definition and Usage

The bezierCurveTo() method adds a point to the current path by using the specified control points that represent a cubic Bézier curve.

A cubic bezier curve requires three points. The first two points are control points that are used in the cubic Bézier calculation and the last point is the ending point for the curve.  The starting point for the curve is the last point in the current path. If a path does not exist, use the beginPath() and moveTo() methods to define a starting point.

A cubic bezier curve

Start point
Control point 1
Control point 2
End point

Tip: Check out the quadraticCurveTo() method. It has one control point instead of two.

JavaScript syntax: context.bezierCurveTo(cp1x,cp1y,cp2x,cp2y,x,y);

Parameter Values

Parameter Description Play it
cp1x The x-coordinate of the first Bézier control point Play it »
cp1y The y-coordinate of the first Bézier control point Play it »
cp2x The x-coordinate of the second Bézier control point Play it »
cp2y The y-coordinate of the second Bézier control point Play it »
x The x-coordinate of the ending point Play it »
y The y-coordinate of the ending point Play it »

❮ HTML Canvas Reference