canvas-5Bezier-QuadraticCurveTo.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Document</title>

</head>

<body>

    <canvas id="canvas" style="margin:0 auto;border:1px #ddd solid">

        The current browser does not support Canvas, can replace the browser a try!

    </canvas>

    <script>

        window.onload = function(){

            var canvas = document.getElementById('canvas');

            canvas.width = 1024;

            canvas.height = 768;

            if(canvas.getContext('2d')){

                var context = canvas.getContext('2d');

                context.lineWidth = 5;

                //案例 ：2arcTo里面注释

            }else{

                alert('当前游览器不支持Canvas，请更换游览器后再试！');

            }

        }

    </script>

</body>

<script>

    /*贝塞尔二次曲线

        起始点（x0,y0）

        控制点（x1,y1）

        终止点（x2,y2）

        context.moveTo(x0,y0);

        context.quadraticCurveTo(x1,y1,x2,y2);

    */

</script>

</html>