var canvas = document.getElementById("myCanvasID");
var context = canvas.getContext('2d');
context.clearRect(0, 0, canvas.width, canvas.height); //clear html5 canvasctx.clearRect(0, 0, canvas.width, canvas.height);const context = canvas.getContext('2d');
context.clearRect(0, 0, canvas.width, canvas.height);var canvas = document.getElementById('myCanvas');
var context = canvas.getContext('2d');
context.clearRect(0, 0, canvas.width, canvas.height);function clear() {
this.context.clearRect(0, 0, window.innerWidth, window.innerHeight);
}