how to check internet connenctivity at every stage in webview flutter code example

Example: check connectivity flutter for webview

import 'dart:async';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:connectivity/connectivity.dart';

void main() => runApp(MyApp());

var connectivityResult = await (Connectivity().checkConnectivity());

await(Future checkConnectivity) {
}

class MyApp extends StatelessWidget {
  
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
      
        primarySwatch: Colors.yellow
      ),
      home: MyHomePage(title: 'Flutter Demooo Home Page'),
    );
  }
}
class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);


  final String title;

  @override
  _MyHomePageState createState() => _MyHomePageState();
}


class _MyHomePageState extends State {
  
  final Completer _controller=Completer();

  
  @override
  Widget build(BuildContext context) {

    return Scaffold(
      
      body: WebView(
        if (connectivityResult == ConnectivityResult.mobile) {
  // I am connected to a mobile network.
} else if (connectivityResult == ConnectivityResult.wifi) {
  // I am connected to a wifi network.

        initialUrl: "https://google.com/",
        onWebViewCreated: (WebViewController webViewController){
          _controller.complete(webViewController);
        },}
        else{
          //i am not connected to any network
        }
      ) );
       
       
    
  }
}