html5——canvas画直线

时间：2022-11-26 21:14:46
<html>

    <head>

        <title>canvas demo</title>

    </head>

    <body>

        <canvas id="mycanvas" width="500px" height="500px" ></canvas>

        <script type="text/javascript">

            var mycanvas = document.getElementById("mycanvas");

            var mycontext = mycanvas.getContext("2d"); 

            mycontext.beginPath();

            mycontext.strokeStyle = "red";

            mycontext.moveTo(70, 140);

            mycontext.lineTo(140, 70);

            mycontext.lineTo(300,200);

            mycontext.lineWidth="5";

            mycontext.stroke();

            mycontext.beginPath();

            mycontext.strokeStyle = "blue";

            mycontext.moveTo(200, 200);

            mycontext.lineTo(400, 500);

            mycontext.stroke();

        </script>

        <style>

            #mycanvas{

                border: solid 1px;

            }

        </style>

    </body>

</html>

效果图

html5——canvas画直线

beginPath()

刷新（开始）画图的开头

moveTo()

开始点

lineto()

记录点，可以多个

stroke()

绘制从beginPath()开始设置的定义图形

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