flutter pub add flutter_web_frame根據套件公開資料產生的選型評估，僅供參考。
Flutter Web Frame 是一個專為 Flutter 應用程式在網頁、桌面與 PWA 平台上限制內容大小而設計的套件。它透過約束佈局尺寸來幫助聚焦內容，讓缺乏響應式設計的應用程式在視覺上更一致且居中。非常適合建立固定寬度的佈局或模擬裝置螢幕，能在不需完整響應式的情況下提升呈現效果。此套件可輕鬆整合至現有專案，設定簡單。
以下為關聯原始碼儲存庫的 README 原文快照，最新內容請造訪原始碼儲存庫。
Make the frame max width / size when on large devices such as Web or Desktop.
This is very suitable to be used to limit the size of content, if your application is not yet available a responsive version if it is run on multiple devices / platforms.
Follow the instructions to install it here
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_web_frame/flutter_web_frame.dart';
void main() {
runApp(MyAp());
}
class MyAp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return FlutterWebFrame(
builder: (context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text('Flutter Web Frame'),
),
body: Center(
child: Text('Body Text'),
),
),
);
},
maximumSize: Size(475.0, 812.0), // Maximum size
enabled: kIsWeb, // default is enable, when disable content is full size
backgroundColor: Colors.grey, // Background color/white space
);
}
}