Web deployment

Deploying a Dart web app works like deploying any other web app. This page describes how to compile your app, tips for making it smaller and faster, and points you to resources for serving the app.

Use the webdev tool to build your app. It compiles Dart to JavaScript and generates all the assets you need for deployment. When you build using the production mode of the compiler, you get a JavaScript file that's reasonably small, thanks to the compiler support for tree shaking.

With a little extra work, you can make your deployable app smaller, faster, and more reliable.

Use the webdev build command to create a deployable version of your app. This command converts your code to JavaScript and saves the result as build/web/main.dart.js. You can use any option available to dart compile js with webdev build.

The following steps are optional. They can help make your app more reliable and responsive.

• Use deferred loading to reduce your app's initial size
• Follow best practices for web apps
• Remove unneeded build files

You can use Dart's support for deferred loading to reduce your app's initial download size. For details, see the language tour's coverage of deferred loading.

The usual advice for web apps applies to Dart web apps. Here are a few resources:

• Fast load times
• Web Fundamentals (especially Optimizing Content Efficiency)
• Progressive Web Apps
• Lighthouse

Web compilers can produce files that are useful during development, such as Dart-to-JavaScript map files, but unnecessary in production.

To remove these files, you can run a command like the following:

# From the root directory of your app:
$ find build -type f -name "*.js.map" -exec rm {} +

You can serve your Dart Web app just like you'd serve any other web app. This section points to tips for serving Dart Web apps, as well as Dart-specific resources to help you use GitHub Pages or Firebase to serve your app.

If your app doesn't use routing or require server-side support, you can serve the app using GitHub Pages. The peanut package is an easy way to automatically produce a gh-pages branch for any Dart web app.

The startup_namer example is hosted using GitHub Pages. Its files are in the gh-pages branch of the filiph/startup_namer repo and were built using peanut.

To learn more about deploying with Firebase, see the following resources:

• The Firebase Hosting documentation describes how to deploy web apps with Firebase.
• In the Firebase Hosting documentation, Configure Hosting Behavior covers redirects, rewrites, and more.

Unless stated otherwise, the documentation on this site reflects Dart 3.5.4. Page last updated on 2024-02-07. View source or report an issue.