MediaWiki:Mobile.js

window.importScript("MediaWiki:MobileUI.js");

$
    .getJSON(mw.config.get("wgScript") + "?title=MediaWiki:MobileUI.json&action=raw&ctype=application/json")
    .then(function (mobileUI) {
        var builder = new MobileUIBuilder(mw);
        builder.build(mobileUI);
    });