1 <!DOCTYPE html> 2 <html lang="en"> 3 <head> 4 <meta charset="UTF-8"> 5 <title>17-Canvas绘制扇形</title> 6 <style> 7 *{ 8 margin: 0; 9 padding: 0; 10 } 11 canvas{ 12 display: block; 13 margin: 0 auto; 14 background: red; 15 } 16 </style> 17 </head> 18 <body> 19 <canvas width="500" height="400"></canvas> 20 <script> 21 // 1.拿到canvas 22 let oCanvas = document.querySelector("canvas"); 23 // 2.从canvas中拿到绘图工具 24 let oCtx = oCanvas.getContext("2d"); 25 oCtx.moveTo(100, 100); 26 oCtx.arc(100, 100, 100, 0, Math.PI/2); 27 oCtx.closePath(); 28 // oCtx.stroke(); 29 oCtx.fill(); 30 </script> 31 </body> 32 </html>
原文：https://www.cnblogs.com/gsq1998/p/12166149.html