<!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>