1. javascript built-in: intl: `supportedvaluesof()`

2. javascript built-in: intl: `supportedvaluesof()`: `"calendar"`

3. javascript built-in: intl: `supportedvaluesof()`: `"collation"`

4. javascript built-in: intl: `supportedvaluesof()`: `"currency"`

5. javascript built-in: intl: `supportedvaluesof()`: `"numberingsystem"`

6. javascript built-in: intl: `supportedvaluesof()`: `"timezone"`

7. javascript built-in: intl: `supportedvaluesof()`: `"timezone"`: `includes `"utc"`

8. javascript built-in: intl: `supportedvaluesof()`: `"unit"`