<canvas id="myCanvas" width="300" height="150" style="border:1px solid #d3d3d3;"> 您的浏览器不支持 HTML5 canvas 标签。 </canvas> <script> var c=document.getElementById("myCanvas"); var ctx=c.getContext("2d"); var grd=ctx.createLinearGradient(0,0,170,0); grd.addColorStop(0,"black"); grd.addColorStop(0.5,"red"); grd.addColorStop(1,"white"); ctx.fillStyle=grd; ctx.fillRect(20,20,150,100); </script>