Further improvements to migration guide for switching locales

[matthewmayer]

Followon from #1735

This "old" example in the migration guide on https://next.fakerjs.dev/guide/upgrading.html has problems

• The Old code doesn't compile on v7 - Faker, de_CH, de and en are not defined.
• I'm not sure what the correct syntax for a custom Faker instance was on v7.x?

Old:

import { faker } from '@faker-js/faker';

const customFaker = new Faker({
  locale: 'de_CH', // the expected locale
  fallbackLocale: 'de', // ensure we have a German fallbacks for addresses
  locales: { de_CH, de, en },
});
const a = customFaker.internet.email();
customFaker.locale = 'en'; // neither 'de_CH' nor 'de' have emojis
const b = customFaker.internet.emoji();

[matthewmayer]

Tried to tweak the old example to compile, but not sure what the correct syntax is for Faker v7.x?

[ST-DDT]

The old imports only work for CJS.

[matthewmayer]

I also get an error using CJS on faker 7

[ST-DDT]

Please post the error message or explain what isn't working.

[matthewmayer]

ok i think i got it. Faker 7.x.x used "localeFallback" but the docs say "fallbackLocale"