MakeSolidColorCanvas function
Implementation
HTML.CanvasElement MakeSolidColorCanvas(String fillStyle) {
HTML.CanvasElement canvas = HTML.CanvasElement(width: 2, height: 2);
HTML.CanvasRenderingContext2D ctx =
canvas.getContext('2d') as HTML.CanvasRenderingContext2D;
ctx.fillStyle = fillStyle;
ctx.fillRect(0, 0, canvas.width!, canvas.height!);
return canvas;
}