Vega Previewer is a small Javascript and Ruby application that allows one to preview a Vega chart and have it reloaded automatically every time the underlying JSON specification is updated. This setup allows one to write a JSON specification using their favourite editor, instead of being forced to write it in a browser. The previewer uses websockets to receive file changes in real-time. The websockets server is powered by Ruby.
A short demo can be seen here: http://downloads.yorickpeterse.com/files/vega_editor.webm.
- Ruby 2.0 or newer
- A browser supporting ECMAScript 6 and websockets
- An editor to edit JSON files
First install all the required Gems:
bundle install
Start the servers:
foreman start
Now point your browser to http://localhost:9000 and you're good to go.
JSON files can be placed in the ./vega directory (its contents are ignored by
Git). Any changes made to these JSON files are published to the connected
websocket clients.
All source code in this repository is licensed under the MIT license unless specified otherwise. A copy of this license can be found in the file "LICENSE" in the root directory of this repository.