Open url alert prompt userscript

open-url-prompt.user.js

// ==UserScript==
// @name           Open url prompt
// @version        0.0.3
// @match          *://*/*
// @author         Flashwalker
// @description    Press Ctrl+Shift+: or Ctrl+Shift+' to open location prompt
// @updateURL      https://gist.githubusercontent.com/Flashwalker/c02e28809a897c4955f34e271db0e427/raw/open-url-prompt.user.js
// @downloadURL    https://gist.githubusercontent.com/Flashwalker/c02e28809a897c4955f34e271db0e427/raw/open-url-prompt.user.js
// @homepage       https://gist.github.com/Flashwalker/c02e28809a897c4955f34e271db0e427
// ==/UserScript==

(function(window, undefined){
    if (window.self !== window.top){
        return;
    }

    const keySet = new Set()
    keySet.add("Semicolon")
    keySet.add("Quote")
    // You can choose another key by event code: https://www.toptal.com/developers/keycode/
    let operatingSystem = navigator.userAgent.toLowerCase().search("mac") !== -1 ? "mac" : "pc"

    // `CTRL + KEY`
    function shortcutPressed(e, activationKey) {
        // Set key event code (: or ')
        if (operatingSystem === "mac") {
            // CMD + KEY
            return e.code === activationKey && e.metaKey && !e.shiftKey && !e.altKey && !e.ctrlKey;
        } else {
            // CTRL + KEY
            return e.code === activationKey && e.ctrlKey && !e.shiftKey && !e.altKey && !e.metaKey;
        }
    }
    // `CTRL + SHIFT + KEY`
    function shortcutShiftPressed(e, activationKey) {
        // Set key event code (: or ')
        if (operatingSystem === "mac") {
            // CMD + SHIFT + KEY
            return e.code === activationKey && e.metaKey && e.shiftKey && !e.altKey && !e.ctrlKey;
        } else {
            // CTRL + SHIFT + KEY
            return e.code === activationKey && e.ctrlKey && e.shiftKey && !e.altKey && !e.metaKey;
        }
    }

    //for (const activationKey of keySet) {
    document.addEventListener('keydown', e => {
        for (const activationKey of keySet) {
            if (shortcutPressed(e, activationKey)) {
                let placeholder = ""
                let url = prompt("Enter the URL", placeholder)
                if(url) {
                    let proto = url.replace(/(^.+?:\/\/).+/gim, '$1')
                    url = url.replace(/^.*?:\/\/(.+)/gim, '$1')
                    if (proto === url) {
                        location.href = 'http://' + url
                    } else {
                        location.href = proto + url
                    }
                }
            }else if (shortcutShiftPressed(e, activationKey)){
                let placeholder = location.href
                let url = prompt("Enter the URL", placeholder)
                if(url) {
                    let proto = url.replace(/(^.+?:\/\/).+/gim, '$1')
                    url = url.replace(/^.*?:\/\/(.+)/gim, '$1')
                    if (proto === url) {
                        location.href = 'http://' + url
                    } else {
                        location.href = proto + url
                    }
                }
            }
        }
    })
    //}
})(window);