[TS migration] Migrate 'LocalePhoneNumber.js' lib to TypeScript

src/libs/LocalePhoneNumber.js → src/libs/LocalePhoneNumber.ts

@@ -3,20 +3,17 @@ import Str from 'expensify-common/lib/str';
 import {parsePhoneNumber} from 'awesome-phonenumber';
 import ONYXKEYS from '../ONYXKEYS';
 
-let countryCodeByIP;
+let countryCodeByIP: number;
 Onyx.connect({
     key: ONYXKEYS.COUNTRY_CODE,
-    callback: (val) => (countryCodeByIP = val || 1),
+    callback: (val) => (countryCodeByIP = val ?? 1),
 });
 
 /**
  * Returns a locally converted phone number for numbers from the same region
  * and an internationally converted phone number with the country code for numbers from other regions
- *
- * @param {String} number
- * @returns {String}
  */
-function formatPhoneNumber(number) {
+function formatPhoneNumber(number: string): string {
     if (!number) {
         return '';
     }
@@ -26,7 +23,7 @@ function formatPhoneNumber(number) {
 
     // return the string untouched if it's not a phone number
     if (!parsedPhoneNumber.valid) {
-        if (parsedPhoneNumber.number && parsedPhoneNumber.number.international) {
+        if (parsedPhoneNumber.number?.international) {
             return parsedPhoneNumber.number.international;
         }
         return numberWithoutSMSDomain;