<canvas id="myCanvas" width="300" height="300"></canvas>
var canvas = document.getElementById("myCanvas");
var context = canvas.getContext("2d");
var grd=context.createRadialGradient(75,50,2,75,50,100);
grd.addColorStop(0,"red");
grd.addColorStop(1,"white");
context.fillStyle = grd; //填滿顏色
context.fillRect(0,0,150,100);
This Pen doesn't use any external CSS resources.
This Pen doesn't use any external JavaScript resources.