Main.hx

@:jsRequire("remote")
extern class Remote {
    static function require(module:String):Dynamic;
}

extern class BrowserWindow {
    function new();
}

@:jsRequire("browser-window")
extern class LocalBrowserWindow extends BrowserWindow {

}

extern class RemoteBrowserWindow extends BrowserWindow {
    static function __init__():Void {
        untyped RemoteBrowserWindow = Remote.require("browser-window");
    }
}

class Main {
    static function main() {
        var localWin = new LocalBrowserWindow();
        var remoteWin = new RemoteBrowserWindow();
    }
}

main.js

// Generated by Haxe
(function () { "use strict";
var Remote = require("remote");
var LocalBrowserWindow = require("browser-window");
var Main = function() { };
Main.main = function() {
	var localWin = new LocalBrowserWindow();
	var remoteWin = new RemoteBrowserWindow();
};
RemoteBrowserWindow = Remote.require("browser-window");
Main.main();
})();