使用JavaScript应用优惠券代码

Question

if (discnt > 0) { // only if discount is active
amt = Dollar (amt - (amt * discnt/100.0) + 8);
des = des + ", " + discnt + "% Discount, Promotion Code Applied " + coupval + ", Standard Shipping of 
$8.00 Applied";
}

上面的代码可以正常工作，没有任何问题，但是，如果未应用上述优惠券代码，我会尝试获取它，我希望应用默认价格并加上（+ 8）

这是我尝试过的：

if (discnt < 0) { // only if discount is not active
amt2 = Dollar (amt2 + 8);
des2 = des2 + ", Standard Shipping of $8.00 Applied";
}

Answer 1

如果优惠券为布尔值，则可以通过这种方式检查是否有条件

if (coupon) { // only if discount is active
amt = Dollar (amt - (amt * discnt/100.0) + 8);
des = des + ", " + discnt + "% Discount, Promotion Code Applied " + coupval + ", Standard Shipping of 
$8.00 Applied";
}

if (!coupon) { // only if discount is not active
amt2 = Dollar (amt2 + 8);
des2 = des2 + ", Standard Shipping of $8.00 Applied";
}