Chuyển màu hình chữ nhật dạng radial gradient trong canvas
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Filling Radial Gradient inside Canvas Shapes</title>
<style>
canvas {
border: 1px solid #000;
}
</style>
<script>
window.onload = function() {
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
context.arc(150, 100, 70, 0, 2 * Math.PI, false);
var grd = context.createRadialGradient(150, 100, 10, 160, 110, 100);
grd.addColorStop(0, '#8ED6FF');
grd.addColorStop(1, '#004CB3');
context.fillStyle = grd;
context.fill();
context.stroke();
};
</script>
</head>
<body>
<canvas id="myCanvas" width="300" height="200"></canvas>
</body>
</html>
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