点击运行
<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="300" height="170" style="border:1px solid #d3d3d3;"> Your browser does not support the HTML5 canvas tag. </canvas> <script> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); ctx.strokeRect(5,5,25,15); ctx.scale(2,2); ctx.strokeRect(5,5,25,15); ctx.scale(2,2); ctx.strokeRect(5,5,25,15); ctx.scale(2,2); ctx.strokeRect(5,5,25,15); </script> </body> </html>
运行结果
