Canvas二次贝塞尔曲线操作实例

canvas = document.getElementById("canvas");
ctx = canvas.getContext("2d")
ctx.lineWidth = 6;
ctx.strokeStyle = "#0090D2";
ctx.beginPath();
ctx.moveTo(100, 250);
ctx.quadraticCurveTo(335, 94, 400, 250);
ctx.stroke();