Bug: "router.base" not work!

[Suomm]

router: {
  mode: "history",
  base: "/app/"
}

[Suomm]

Configuration in my index.html :

new Docute({
    router: {
      mode: "history",
      base: "/app/"
    }
})

The base URL of the app. For example, if the entire single page application is served under /app/, then base should use the value "/app/". But it doesn't work. Oh, my poor English.