I’m constructing my API router inside a function

package api

import "net/http"

func New() http.Handler {
    mux := http.NewServeMux()

    mux.HandleFunc("GET /ping", func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
    })

    // other routes go here...

    return mux
}

and I want every route to have the route prefix /api. Do I have to create a subrouter for this like so?

// ...

apiRouter := http.NewServeMux()

// let the apiRouter instance handle all routes now
apiRouter.HandleFunc("GET /ping", func(w http.ResponseWriter, r *http.Request) {
    w.WriteHeader(http.StatusOK)
})

mux.Handle("/api/", http.StripPrefix("/api", apiRouter))

// ...

so I’m basically a new router instance inside the mux instance. But is there a simpler way to achieve this? This approach feels weird because I have to nest an additional router instance.