// it should be stored in localStorage
function saveMyCanvas(e) {
	console.log('Saving...')
	// saveCanvas(canvas, dishName, 'png')
	// this way worked!
	var imgCanvas = document.getElementById('canvas'); // get the canvas created by p5js
	var imageAsDataURL = imgCanvas.toDataURL("image/png");
	localStorage.
 
setItem('CHICKEN', imageAsDataURL);

	myCanvas = localStorage.getItem("CHICKEN");

	console.log(myCanvas);
}

先通過原生JS得到canvas元素，然後再考慮用toDataURL的方式儲存到localStorage，在setup裡canvas只是一個指標，指向物件，但不是物件本身。

END.