慕课在线编辑器

代码提交代码

<!DOCTYPE html>
<html>
<head>
	<meta charset="utf-8">
	<title>慕课网Wiki</title>
    <style>
        #imooc{
            border:1px solid #ccc;
        }
    </style>
</head>
<body>
    <canvas id="imooc">您的浏览器不支持 HTML5 canvas 标签</canvas>
    <script>
		const canvas = document.getElementById('imooc');
		canvas.width=300;
		canvas.height=300;
		const ctx = canvas.getContext('2d');
		
		
		ctx.fillStyle = "#456795"
		ctx.font="16px 微软雅黑"
		ctx.textAlign = "left"
		ctx.fillText("慕课Wiki left", 150, 30)
		ctx.textAlign = "center"
		ctx.fillText("慕课Wiki center", 150, 60)
		ctx.textAlign = "right"
		ctx.fillText("慕课Wiki right", 150, 90)
		ctx.textAlign = "start"
		ctx.fillText("慕课Wiki start", 150, 120)
		ctx.textAlign = "end"
		ctx.fillText("慕课Wiki end", 150, 150)
		
	
		ctx.direction = "rtl";	 //设定画布的渲染方向
		
		ctx.fillStyle = "red"
		ctx.font="16px 微软雅黑"
		ctx.textAlign = "left"
		ctx.fillText("慕课Wiki left", 150, 180)
		ctx.textAlign = "center"
		ctx.fillText("慕课Wiki center", 150, 210)
		ctx.textAlign = "right"
		ctx.fillText("慕课Wiki right", 150, 240)
		ctx.textAlign = "start"
		ctx.fillText("慕课Wiki start", 150, 270)
		ctx.textAlign = "end"
		ctx.fillText("慕课Wiki end", 150, 300)
		
		//绘制中间参考线
		ctx.beginPath()
		ctx.strokeStyle="#ccc";
		ctx.moveTo(150,0);
		ctx.lineTo(150,300);
		ctx.stroke();
		
		//绘制中间参考线
		ctx.beginPath()
		ctx.strokeStyle="#ccc";
		ctx.moveTo(0,150);
		ctx.lineTo(300,150);
		ctx.stroke();
	
	</script>
<body>
</html>

运行结果