W3School TIY
(请在下面的文本框中编辑您的代码,然后单击此按钮测试结果。)
编辑您的代码:
<!DOCTYPE html> <html> <body> <canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;"> Your browser does not support the HTML5 canvas tag.</canvas> <script type="text/javascript"> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); var gradient=ctx.createLinearGradient(0,0,170,0); gradient.addColorStop("0","magenta"); gradient.addColorStop("0.5","blue"); gradient.addColorStop("1.0","red"); // Fill with gradient ctx.strokeStyle=gradient; ctx.lineWidth=5; ctx.strokeRect(20,20,150,100); </script> </body> </html>
查看结果: