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Dart Language Specification

Use this page to find the formal Dart language specification. For a gentler introduction to Dart, see the language tour.

Dart 2

Dart 2 has changed the Dart language in many ways, some of which are not backward-compatible. For details, see the Dart 2 page.

The formal language specification is not yet up-to-date. For information about Dart 2 changes, see the following resources.

Dart 1.x

Download the formal language specification from the Ecma International website: