const canvas = document.getElementById('my-canvas');
const ctx = canvas.getContext('2d');
// 设置阴影样式
ctx.shadowColor = 'rgba(0, 0, 0, 0.5)';
ctx.shadowOffsetX = 2;
ctx.shadowOffsetY = 2;
ctx.shadowBlur = 5;
// 绘制文本
ctx.font = '24px Arial';
ctx.fillText('Hello World', 50, 50);