qq_46113598的博客

简单封装一个箭头模型<canvas id="canvas" width="500" height="500"></canvas> <script> //获取ID function getId(id) { return document.getElementById(id); } //获取上下文 let canvas = getId('canvas').g.

0-1初学绘制正方形 <canvas id="canvas" width="500" height="500"></canvas> <script> //获取canvas const canvas = document.getElementById('canvas') //画布对象 const app = canvas.getContext('2d') //填充颜色 ..