How to draw a quadratic curve on HTML5 Canvas?

The HTML5 <canvas> tag is used to draw graphics, animations, etc. using scripting. It is a new tag introduced in HTML5. The canvas element has a DOM method called getContext, which obtains rendering context and its drawing functions. This function takes one parameter, the type of context 2d.

To draw a Quadratic curve with HTML5 canvas, use the quadraticCurveTo() method. This method adds the given point to the current path, connected to the previous one by a quadratic Bezier curve with the given control point.

You can try to run the following code to learn how to draw a quadratic curve on HTML5 Canvas. The x and y parameters in quadraticCurveTo() method are the coordinates of the endpoint. cpx and cpy are the coordinates of the control point.


<!DOCTYPE html>
      <title>HTML5 Canvas Tag</title>

      <canvas id="newCanvas" width="500" height="300" style="border:1px
         solid #000000;"></canvas>
         var c = document.getElementById('newCanvas');
         var ctx = c.getContext('2d');

         // Draw shapes


Swarali Sree
Swarali Sree

I love thought experiments.