setLocale.ts

import IDevtoolsSession from '@secret-agent/interfaces/IDevtoolsSession';
import BrowserEmulator from '../../index';

export default async function setLocale(
  emulator: BrowserEmulator,
  devtools: IDevtoolsSession,
): Promise<void> {
  const { locale } = emulator;
  if (!locale) return;
  try {
    await devtools.send('Emulation.setLocaleOverride', { locale });
  } catch (error) {
    // not installed in Chrome 80
    if (error.message.includes("'Emulation.setLocaleOverride' wasn't found")) return;
    // All pages in the same renderer share locale. All such pages belong to the same
    // context and if locale is overridden for one of them its value is the same as
    // we are trying to set so it's not a problem.
    if (error.message.includes('Another locale override is already in effect')) return;
    throw error;
  }
}