Chrome插件中的角度应用程序出现错误

Question

我正在使用angular（v7.2.11）开发chrome扩展程序，但遇到以下异常：

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  List<String> mylist = ["aaaa","bbbb","cccc","ddd","eee","fff","ggg"];

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(body: Column(
        verticalDirection: VerticalDirection.down,
        children: <Widget>[
          Flexible(child: ListView.builder(itemBuilder: listbuilder,itemCount: mylist.length,)),
      ListTile(leading: Text("this should be below the other"))
      ]),)

    );
  }

  Widget listbuilder(BuildContext context, int index)
  {
    return ListTile(leading: Text(mylist[index]),

    );
  }
}

Answer 1

• 已安装@ webcomponents / custom-elements：

npm install @webcomponents/custom-elements --save

• 在polyfills.ts中将其导入到zone.js之前：

...
import '@webcomponents/custom-elements';
import 'zone.js/dist/zone';
...