​x
 
<!DOCTYPE html>
<html>
<body>
​
<h1>HTML5 Canvas</h1>
​
<canvas id="myCanvas" width="200" height="100" style="border:1px solid grey;"></canvas>
​
<script>
const c = document.getElementById("myCanvas");
const ctx = c.getContext("2d");
​
// 创建渐变：
const grd = ctx.createLinearGradient(0,0,200,0);
grd.addColorStop(0,"red");
grd.addColorStop(1,"white");
​
// 填充渐变：
ctx.fillStyle = grd;
ctx.fillRect(10,10,150,80);
</script>
​
</body>
</html>
​