javascript - date.toLocaleDateString conversion with locale Arabic yields different results in Chrome and firefox

Question

I have a function that formats date using date.toLocaleDateString I see that when I have locale set to 'Arabic' the results in Chrome are different from what is on FF and Safari.

let date = new Date();
const dateOptions = {
  day: "2-digit",
  month: "2-digit",
  year: "numeric"
};

console.log(date.toLocaleDateString("ar", dateOptions));

question from:https://stackoverflow.com/questions/65924543/date-tolocaledatestring-conversion-with-locale-arabic-yields-different-results-i

Answer 1

Try to use ar-eg instead of just ar:

console.log(date.toLocaleDateString("ar-eg", dateOptions));

But remember that the toLocaleDateString implentation is always application dependent, furthermore there are browsers that do not implement the locale/option parameters.

You can check the language and options support by using the following functions:

function dateSupportsLocales(language) {
  try {
    new Date().toLocaleDateString(language);
  } catch (e) {
    return e.name !== 'RangeError';
  }
  return true;
}

function dateSupportsOptions() {
  try {
    new Date().toLocaleDateString('en', {});
    return true;
  }
  catch (e) { }
  return false;
}

Check also the Date.prototype.toLocaleDateString MDN Reference for more informations.