[UserScript] Swap google search language en / any

user.js

// ==UserScript==
// @name         Swap google search language en / any
// @namespace    https://netmark.jp/userscript/www.google.com
// @version      0.1
// @description  switch search language en or all
// @author       Toshiaki Baba
// @match        https://www.google.com/search?*
// @grant        all
// ==/UserScript==

function swapLRParam(){
    let u;

    u = new URL(location);
    if (u.searchParams.has('lr')) {
        // remove the param lr
        u.search = u.search.replace(/&lr=[^&]*&/, '&');
        u.search = u.search.replace(/&lr=[^&]*$/, '');
        u.search = u.search.replace(/\?lr=[^&]*&/, '?');
    } else {
        u.search = u.search+'&lr=lang_en';
    }
    console.log(u.href);

    // // replacing location is prohibited(behavior is overwrited by google's script
    // failed: setTimeout(()=>{location.href = u.href;}, 800);
    // failed: location.replace(u.href);
    window.open(u.href, "_blank");
}

(function() {
    'use strict';

    let button;
    let searchButton;

    button = document.createElement("button");
    button.textContent = "en/all";
    // Append button next to the search button
    searchButton = document.getElementsByTagName("button")[0];
    button.setAttribute("class", searchButton.getAttribute("class"));

    button.addEventListener("click", swapLRParam);
    searchButton.parentElement.appendChild(button);
})();