yuey0809的博客

页面布局 <canvas id="canvas" width="500px" height="300px"></canvas> JS代码 let canvas = document.getElementById("canvas"); //获取画板 let ctx = canvas.getContext("2d"); //获取2d绘画对象 ctx.moveTo(100, 100); //设置起始点为100,100 ctx.lineTo(200, 100); //规划路径 ctx.st