我该如何检查用户是否点击了fillRect生成的方块，并在点击时执行操作？

canvas.addEventListener('click', function(event) {
   // 点击事件的处理逻辑
});

canvas.addEventListener('click', function(event) {
   var mouseX = event.clientX;
   var mouseY = event.clientY;
   // 处理点击位置的逻辑
});

canvas.addEventListener('click', function(event) {
   var mouseX = event.clientX;
   var mouseY = event.clientY;
   
   // 假设方块的位置和尺寸为：rectX、rectY、rectWidth、rectHeight
   if (mouseX >= rectX && mouseX <= rectX + rectWidth &&
       mouseY >= rectY && mouseY <= rectY + rectHeight) {
       // 在方块内部进行操作
   }
});

canvas.addEventListener('click', function(event) {
   var mouseX = event.clientX;
   var mouseY = event.clientY;
   
   if (mouseX >= rectX && mouseX <= rectX + rectWidth &&
       mouseY >= rectY && mouseY <= rectY + rectHeight) {
       // 执行操作的逻辑
   }
});