I have issues setting an inline condition for my shipping price :
cart.shippingPrice =
country === ("France" || "United States") ? toPrice(20) : toPrice(10);
Only when I select France the condition returns 20, but I want United States to return it as well, is there a typo ?
You need to explicitly check against each country:
country === "France" || country === "United States"
If you "fear" that more countries will come to the list, you could create an array:
const countries = ["France", "United States"]
and then do
countries.includes(country)
In your expression and in question contents if it's returning 20 it means the condition is true.
Try:
cart.shippingPrice = (country === "France" || country === "United States) ? toPrice(20) : toPrice(10)