JSFiddle - React, Tailwind, and code Playground
JavaScript
const LOCALES = "en,zh-hk"
const locales = LOCALES.split(",");
locales.forEach(locale => {
let intlLocale = locale;
const localeStripIndex = locale.indexOf('-');
if(localeStripIndex !== -1) {
intlLocale = locale.substring(0, localeStripIndex);
}
console.log(intlLocale);
});