Developing Dart Web Applications

Contents

• Core Constraints
• JavaScript Interoperability
• Web Tooling & Environment
• Workflows
• Examples

Core Constraints

• Use package:web: Always prefer package:web over the legacy dart:html, dart:js, or dart:js_util libraries.
• Avoid dart:mirrors: Never use dart:mirrors in web applications, as it is completely unsupported in Dart web compilation.
• Use dart:js_interop: Implement all JavaScript interoperability using the dart:js_interop library.
• Prefer Extension Types: Define JavaScript interop boundaries and complex JS objects using Dart extension type declarations combined with @JS annotations.

JavaScript Interoperability

Implement JavaScript interoperability to seamlessly integrate JS libraries and browser APIs into Dart web apps.