<!DOCTYPE html>
<html>
<body>
<canvas id="myCanvas" width="200" height="200" style="border:1px solid">
Your browser does not support the HTML5 canvas tag.
</canvas>
<br>
<script>
const c = document.getElementById("myCanvas");
const ctx = c.getContext("2d");
ctx.fillStyle = "#92B901";
ctx.fillRect(50, 50, 100, 100);
function clearCanvas() {
c.width = 400;
}
</script>
<button onclick="clearCanvas()">Clear canvas</button>
</body>
</html>