Web support for Flutter

Flutter's web support delivers the same experiences on the web as on mobile. Building on the portability of Dart, the power of the web platform and the flexibility of the Flutter framework, you can now build apps for iOS, Android, and the browser from the same codebase. You can compile existing Flutter code written in Dart into a web experience because it is exactly the same Flutter framework and web is just another device target for your app.

Adding web support to Flutter involved implementing Flutter's core drawing layer on top of standard browser APIs, in addition to compiling Dart to JavaScript, instead of the ARM machine code that is used for mobile applications. Using a combination of DOM, Canvas, and WebAssembly, Flutter can provide a portable, high-quality, and performant user experience across modern browsers. We implemented the core drawing layer completely in Dart and used Dart's optimized JavaScript compiler to compile the Flutter core and framework along with your application into a single, minified source file that can be deployed to any web server.

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:

The following resources can help you get started:

• To add web support to an existing app, or to create a new app that includes web support, see Building a web application with Flutter.
• To learn about Flutter's different web renderers (HTML and CanvasKit), see Web renderers
• To learn how to create a responsive Flutter app, see Creating responsive apps.
• To view commonly asked questions and answers, see the web FAQ.
• To see code examples, check out the web samples for Flutter.
• To see a Flutter web app demo, check out the Wonderous app.
• To learn about deploying a web app, see Preparing an app for web release.
• File an issue on the main Flutter repo.
• You can chat and ask web-related questions on the #help channel on Discord.