canvas笔记-closePath函数的使用（含例子）- 前端开发

如下代码：


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<canvas id="canvas" style="border:1px solid #aaa;display:block;margin:50px auto;">
    当前浏览器不支持Canvas，请更换浏览器后再试
</canvas>
 
<script>
    window.onload = function(){
 
        let canvas = document.getElementById("canvas");
        canvas.width = 800;
        canvas.height = 800;
 
        let context = canvas.getContext("https://cdn.jxasp.com:9143/image/2d");
        context.lineWidth = 10;
 
        context.beginPath();
        context.moveTo(100, 200);
        context.lineTo(300, 400);
        context.lineTo(100, 600);
        context.strokeStyle = "red";
        context.closePath();
        context.stroke();
    }
</script>
 
</body>
</html>

运行截图如下：

修改代码如下：


<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<canvas id="canvas" style="border:1px solid #aaa;display:block;margin:50px auto;">
    当前浏览器不支持Canvas，请更换浏览器后再试
</canvas>
 
<script>
    window.onload = function(){
 
        let canvas = document.getElementById("canvas");
        canvas.width = 800;
        canvas.height = 800;
 
        let context = canvas.getContext("https://cdn.jxasp.com:9143/image/2d");
        context.lineWidth = 10;
 
        context.beginPath();
        context.moveTo(100, 200);
        context.lineTo(300, 400);
        context.lineTo(100, 600);
        context.fillStyle = "red";
        context.closePath();
        context.fill();
    }
</script>
 
</body>
</html>