Systematically add fragment to URLs

I have a mean-stack website with html5mode enabled. In index.html, I have <base href="/1/" />. And I have the following nginx setting such that www.myweb.com/home becomes automatically www.myweb.com/1/home (www.myweb.com/js/abc.js remains www.myweb.com/js/abc.js):

location ~* ^/\b(?!1|stylesheets|js)\w+\b/? {
    rewrite .* /1$request_uri redirect;
}

Now, I have to add a special library, which unfortunately disables html5mode. So I am going to give up html5mode for the whole websites.

So now, I expect a rewrite rule such that

www.myweb.com/home ==> www.myweb.com/1/#/home
www.myweb.com/js/controller.js ==> www.myweb.com/js/controller.js
www.myweb.com/1/abc/def ==> www.myweb.com/1/#/abc/def
www.myweb.com/1/#/abc/def ==> www.myweb.com/1/#/abc/def

Does anyone know how to modify the above rewriting to enable this? Because my website is already online. I want to make sure the rules before changing the production…

Edit 1: I guess if I write

location ~* ^/\b(?!1|stylesheets|js)\w+\b/? {
    rewrite .* /1/#$request_uri redirect;
}

That will result in

www.myweb.com/home ==> www.myweb.com/1/#/home (correct)
www.myweb.com/js/controller.js ==> www.myweb.com/js/controller.js (correct)
www.myweb.com/1/abc/def ==> www.myweb.com/1/abc/def (wrong)
www.myweb.com/1/#/abc/def ==> www.myweb.com/1/#/abc/def (correct)

Systematically add fragment to URLs