ReferenceError: App is not defined

I am getting following error in browser but in Android device it is working fine.
ReferenceError: App is not defined

My framework7 configuratioon.

// Import F7 Bundle
import Framework7 from "framework7/framework7.esm.bundle.js";

// Import F7-React Plugin
import Framework7React from "framework7-react";

// Init F7-React Plugin
Framework7.use(Framework7React);