How do I configure JSData with cookie-based sessions and CSRF headers?

I need to set up my JSData configuration to pass along info for cookie-based session authentication, as well as CSRF headers.

When instantiating the HttpAdapter, use the following to set withCredentials (read more) and the CSRF header (example below sets the X-CSRFToken header, but that's specific to the server-side framework; it might be something else in others' cases).

const adapter = new HttpAdapter({
    ...
    httpConfig: {
        withCredentials: true // send cookie-based session credentials
    },
    ...
    beforeHTTP: function(config, opts) {
        ...
        config.headers || (config.headers = {});
        config.headers['X-CSRFToken'] = token;
        ...
        return HttpAdapter.prototype.beforeHTTP.call(this, config, opts);
    }
})

Getting the value for token can be done in different ways, e.g. basic version, Angular 2+ version, etc.