browserFeatures

index.js

/**
 * Returns whether the current browser supports
 * the `locales` argument of Number.prototype.toLocaleString().
 * IE < 11 does not.
 * Copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Checking_for_support_for_locales_and_options_arguments
 * @return {boolean} true if browser supports it, otherwise false.
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Browser_compatibility
 */
function toLocaleStringSupportsLocales() {
  const number = 0;
  try {
    number.toLocaleString('i');
  } catch (e) {
    return e.name === 'RangeError';
  }
  return false;
}

/**
 * Returns whether the current browser supports
 * the `locales` argument of Number.prototype.toLocaleString().
 * IE < 11 does not.
 * Copied from https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Checking_for_support_for_locales_and_options_arguments
 * @return {boolean} true if browser supports it, otherwise false.
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/toLocaleString#Browser_compatibility
 */
function toLocaleStringSupportsOptions() {
  return !!(typeof Intl === 'object' && Intl && typeof Intl.NumberFormat === 'function');
}

export default {
  toLocaleStringSupportsLocales,
  toLocaleStringSupportsOptions,
};