What should happen when invalid data is provided?

[rsolomakhin]

The spec does not explicitly state that the browser should throw an exception when, for example, invalid amount is provided.

total: {label: "total", amount: {currency: "USD", value: "x"}}

Should the spec explicitly specify that an exception must be thrown or is that implicit?

[adrianba]

This was fixed in #256. If this change was insufficient then please reopen this issue with a specific proposal for what needs to be changed.

[rsolomakhin]

I propose that the following text be added:

"If the value is invalid, UA should throw TypeError."

Is there a better error type for signifying invalid input parameters?

[adrianba]

This is in the spec - for example see steps 5, 7, 8, 11, and 13 of the constructor algorithm.