import 'dart:html'; void main() { CanvasElement canvas = new Element.tag("canvas"); canvas.height = 500; canvas.width = 500; document.body.children.add(canvas); var ctx = canvas.getContext("2d"); ctx.font ="30px 'MS ゴシック'"; ctx.fillText("猫", 50, 50); ctx.beginPath(); ctx.moveTo(150, 150); ctx.lineTo(390, 390); ctx.stroke(); }