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How to draw a rounded Rectangle on HTML Canvas?
To draw a rectangle in HTML, use the canvas element. With canvas, use the rect() method to draw a rectangle. But, for creating a rounded rectangle, using the rect() method won’t work. We will be using the lineTo() and quadraticCurveTo() method to create a rounded rectangle.
This is how you can create a canvas in HTML5 −

You can learn how to create a rounded rectangle in canvas
Example
<!DOCTYPE HTML>
<html>
<head>
<title>HTML5 Canvas Tag</title>
</head>
<body>
<canvas id="newCanvas" width="300" height="150"></canvas>
<script>
var canvas = document.getElementById('newCanvas');
var ctx = canvas.getContext('2d');
ctx.beginPath();
ctx.moveTo(20, 10);
ctx.lineTo(80, 10);
ctx.quadraticCurveTo(90, 10, 90, 20);
ctx.lineTo(90, 80);
ctx.quadraticCurveTo(90, 90, 80, 90);
ctx.lineTo(20, 90);
ctx.quadraticCurveTo(10, 90, 10, 80);
ctx.lineTo(10, 20);
ctx.quadraticCurveTo(10, 10, 20, 10);
ctx.stroke();
</script>
</body>
</html>
Output

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