我在AppBar部分中创建一个PopupMenuButton（）。这是我的文件：

import 'dart:js';
import 'package:bfdi_app/settings.dart';
import 'package:cached_network_image/cached_network_image.dart';
import 'package:flutter/material.dart';

class ProfilePage extends StatefulWidget {

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

class _ProfilePageState extends State<ProfilePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(
          'App_Name',
          ),
        actions: <Widget>[
            PopupMenuButton(
              icon: Icon(Icons.settings),
              onSelected:(value){
                if(value==0){
                  Navigator.push(
                    context,
                    MaterialPageRoute(builder: (context)=>SettingPage())
                  );
                }
              },
              itemBuilder: (context) => [
                    PopupMenuItem(
                      child: Text("Settings"),
                      value:0,
               ],
            ),
          ],
       ),
      }

现在，我在控制台日志中遇到错误：

Compiler message:
lib/Pages/addPost.dart:1:8: Error: Not found: 'dart:js'
import 'dart:js';
       ^
lib/Profile/profile.dart:1:8: Error: Not found: 'dart:js'
import 'dart:js';
       ^

我已经添加了依赖项dart：js，但仍然遇到相同的错误。