How to draw a circle in HTML5 Canvas using JavaScript

Question

How to draw a simple circle in HTML5 Canvas using minimum JavaScript code?

Answer 1

Here's how to draw a circle in HTML5 using JavaScript:

const canvas = document.getElementById('myCanvas');
const context = canvas.getContext('2d');
const centerX = canvas.width / 2;
const centerY = canvas.height / 2;
const radius = 70;

context.beginPath();
context.arc(centerX, centerY, radius, 0, 2 * Math.PI, false);
context.fillStyle = 'green';
context.fill();
context.lineWidth = 5;
context.strokeStyle = '#003300';
context.stroke();

body {
  margin: 0;
  padding: 0;
}

<canvas id="myCanvas" width="578" height="200"></canvas>