webix Jet, send parameter to view by url

Webix JS
#1

I need to send a parameter to existing view by url (to use it in SEO)
example:
current url is: /app/view
need to change it to: /app:lang=en/view
other parts of url must not change
how to do this in new Jet?
in prev version this was possible using this.$scope.show({lang:'en'})

#2

I can confirm the regression, will be fixed.

Right now, show accepts only one string parameter (url).
You can use

.show("./app?lang=en")

still, these parameters will be available in the JetView class methods (urlChange, for example)

#3

I am using typescript version, so my workaround is

import {parse, url2str} from "Jet/helpers"
...
const url = parse(app.getRouter().get())
webix.extend(url[0].params, { lang:'en' }, true)
app.getRouter().set(url2str(url))