How To Webview Run Javascript Using Flutter Android App

dependencies:
  flutter:
    sdk: flutter
  flutter_webview_plugin: 0.3.0+2

flutter pub get

import 'package:flutter/material.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: MyHomePage(),
    );
  }
}
class MyHomePage extends StatefulWidget {
  final String title;
  MyHomePage({this.title});
  @override
  _MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage>{
  final flutterWebviewPlugin = new FlutterWebviewPlugin();

  @override
  void initState(){
    super.initState();
    flutterWebviewPlugin.evalJavascript("alert('Bajarangisoft.com')");


  }
  @override
  void dispose() {
    flutterWebviewPlugin.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return WebviewScaffold(
      url: 'https://Bajarangisoft.com',
      hidden: true,
      appBar: AppBar(title: Text("Run JS in Webview")),
    );
  }
}