Flutter 正式支持 Web 平台

Flutter 的 Web 端支持在 Web 和移动设备上提供相同的体验。基于 Dart 的可移植性、Web 平台的强大以及 Flutter 框架的灵活性,你现在可以从同一个代码库为 iOS、Android 和浏览器构建应用。你可以将用 Dart 编写的现有 Flutter 代码编译成 web 体验,因为它就是完全相同的 Flutter 框架,而 Web 只是你的应用的另一个设备目标。

Flutter architecture for web

向 Flutter 添加 Web 支持涉及在标准浏览器 API 之上实现 Flutter 的核心绘图层。通过结合使用 DOM、Canvas 和 CSS,Web 支持旨在为现代浏览器提供便携、高质量和高性能的用户体验。我们在 Dart 中完全实现了这个核心绘图层,并使用 Dart 的优化过的 JavaScript 编译器将 Flutter 核心与框架,同你的应用程序一起编译成一个可以部署到任何 Web 服务器的简化源文件。

While you can do a lot on the web, Flutter's web support is most valuable in the following scenarios:

A Progressive Web Application built with Flutter
Flutter delivers high-quality PWAs that are integrated with a user's environment, including installation, offline support, and tailored UX.
Single Page Application
Flutter's web support enables complex standalone web apps that are rich with graphics and interactive content to reach end users on a wide variety of devices.
Existing mobile applications
Web support for Flutter provides a browser-based delivery model for existing Flutter mobile apps.

Not every HTML scenario is ideally suited for Flutter at this time. For example, text-rich, flow-based, static content such as blog articles benefit from the document-centric model that the web is built around, rather than the app-centric services that a UI framework like Flutter can deliver. However, you can use Flutter to embed interactive experiences into these websites.

For a glimpse into how to migrate your mobile app to web, see the following video:

关于 web 支持的说明