Tampermonkey Script - Redirect to Google Map Japan

redirect-to-google-map-japan.js

// ==UserScript==
// @name         Redirect to Google Map Japan
// @namespace    http://tampermonkey.net/
// @version      2024-04-14
// @description  redirect to Google Map Japan whatever the language is set
// @author       mehunk
// @match        https://www.google.com/maps/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=google.com
// @grant        none
// ==/UserScript==

(function() {
  'use strict';

  const LANG_PROP = 'hl'
  const TARGET_LANG = 'ja'

  const url = new URL(document.URL)
  const lang = url.searchParams.get(LANG_PROP)

  if (lang === TARGET_LANG) {
    return
  }

  url.searchParams.set(LANG_PROP, TARGET_LANG)
  document.location.href = url.toString()
})();