canvas circle w3school code example
Example 1: make a circle in javascript
function draw()
{
var canvas = document.getElementById('circle');
if (canvas.getContext)
{
var ctx = canvas.getContext('2d');
var X = canvas.width / 2;
var Y = canvas.height / 2;
var R = 45;
ctx.beginPath();
ctx.arc(X, Y, R, 0, 2 * Math.PI, false);
ctx.lineWidth = 3;
ctx.strokeStyle = '#FF0000';
ctx.stroke();
}
}
Example 2: canvas tag html
<canvas id="canv"></canvas>
var canvas = document.getElementById("canv");
canvas.width = canvas.height = 100;
var ctx = canvas.getContext("2d");
ctx.fillStyle = "red";
ctx.fillRect(10, 10, 80, 80);