Js library Uncaught TypeError

[jack-booxi]

Hi team, basically observed 2 errors
1.Uncaught TypeError: e.country_code.toUpperCase is not a function. around line 13537 like below
Eh = function(e) {
var a = arguments.length > 1 && void 0 !== arguments[1] ? arguments[1] : null,
n = e.country_code && e.country_code.toUpperCase();
.......
}
I feel confused since the input argument key is 'countryCode' while here is 'country_code'

2.isInteger is not a function. around line 13598 like below
if (e.country && e.state && Number.isInteger(e.country) && (e.country = e.state, delete e.state), a && a.length) {
.......
}
isInteger is not supported by ie browser, does it also mean the formatter library does not support ie browser?

Thanks for review!

[JirkaChadima]

1. Uncaught TypeError: e.country_code.toUpperCase that would mean that the country_code in that specific case is undefined or null. Do you have the address that failed?
2. Definitely no IE support. Even Microsoft does not support it anymore.

[JirkaChadima]

Closing as stale. Reopen if needed