This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
currencySystem is a string which specifies the
standard being used to specify the
value is specified
in. For example, the default is
specifies that the standard used is ISO 4217.
This property has been removed from the specification and should no longer be used; the currency is now always specified using ISO 4127.
currencySystem = paymentCurrencyAmount.currencySystem;
This property was removed in the May 3, 2018 update of the Payment Request API specification. This feature is no longer on track to become a standard.
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