@formatjs/intl-numberformat/lib/polyfill.js

Ponyfill for ES2020 Intl.NumberFormat

import { NumberFormat } from './src/core';
import { toLocaleString as _toLocaleString } from './src/to_locale_string';
import { defineProperty } from '@formatjs/ecma402-abstract';
import { shouldPolyfill } from './should-polyfill';
if (shouldPolyfill()) {
    defineProperty(Intl, 'NumberFormat', { value: NumberFormat });
    defineProperty(Number.prototype, 'toLocaleString', {
        value: function toLocaleString(locales, options) {
            return _toLocaleString(this, locales, options);
        },
    });
}