W3Schools Canvas 演示 - W3Schools 中文教程

#myCanvas

quadraticCurveTo

350

20,100,200,20|50,100,200,20|100,100,200,20|200,100,200,20|500,100,200,20|-100,100,200,20|-500,100,200,20

ctx.beginPath(); ctx.moveTo(20,20); ctx.quadraticCurveTo(#val); ctx.stroke();