Vaadin allows you to build modern web apps efficiently in plain Java, without touching low level web technologies.

This repository contains source code and issue tracking for Vaadin 8 and Vaadin 7, both of which use GWT as the base of client-side implementations. You can find source code and issue tracking for newer, web component based Vaadin versions in vaadin/platform.

Vaadin 8 includes Vaadin 7 compatibility classes and is supported until February 21, 2022 (extended support will be available for ten years after that).

Vaadin 7 support has already ended, extended support is available until February 2029.

Please refer to Vaadin tutorial and other documentation.

For known issues within Vaadin framework, see Issue Tracker. Comment or react to an existing issue to mark your interest in resolving it. If you don't find an existing report of an issue you are experiencing, submit a new issue.

To contribute, first refer to Contributing Code for general instructions and requirements for contributing code to the Vaadin framework.

For instructions on how to set up a working environment for developing the Vaadin framework, please visit Development Instructions. Pay special attention to workspace preferences.

We appreciate all contributors and want to make submitting changes as easy as possible. If you find any mistakes, unclear parts or out-of-date instructions, please let us know by submitting an issue or a pull request.