In the example below, the correct calculation is performed, but for some unknown reason p.calcPrice ends up being a string. It should ideally be a number since using .toFixed() on a string doesn't make sense.
When I refer to p.calcPrice, do I need to explicitly convert it using +p.calcPrice? Or is there a way for TypeScript to recognize it as a number so that casting is not required?
p.calcPrice = (
price *
+p.amount *
(1 - pD / 100) *
(1 - mD / 100)
).toFixed(2);
When using the <code>toFixed method in JavaScript, keep in mind that it returns a string value which needs to be manually casted if you require a number.
For more information on the return value of the toFixed method, check out this link
If you need to cast it as a number, one approach is to wrap the result in the Number constructor like so:
p.calcPrice = Number((price * +p.amount * (1 - pD / 100) * (1 - mD / 100)).toFixed(2));
To ensure the result is cast as a number, you can implement the rewrite below. It's important to take note of using the + sign before the statement:
p.totalCost = +(
cost *
+p.quantity *
(1 - pD / 100) *
(1 - mD / 100)
).toFixed(2);
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