2 1 What are Flutter Dart Packages

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Package introduction
Packages enable the creation of modular code that can be shared easily. A minimal package consists of the following:

pubspec.yaml
A metadata file that declares the package name, version, author, and so on.
lib
The lib directory contains the public code in the package, minimally a single "package-name".dart file.

Package types
Packages can contain more than one kind of content:

Dart packages
General packages are written in Dart, for example, the path package. Some of these might contain Flutter specific functionality and thus have a dependency on the Flutter framework, restricting their use to Flutter only, for example, the fluro package.
Plugin packages
A specialized Dart package that contains an API written in Dart code combined with one or more platform-specific implementations.
Plugin packages can be written for Android (using Kotlin or Java), iOS (using Swift or Objective-C), web, macOS, Windows, or Linux, or any combination thereof.

A concrete example is the url_launcher plugin package. To see how to use the url_launcher package, and how it was extended to implement support for the web, see the Medium article by Harry Terkelsen

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Язык программирования Dart
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