Data binding and syncing between JavaScript and Kernel

[Simon Biggs]

I noticed that declarative widgets achieves data binding and syncing between JavaScript and the kernel. I believe that ipywidgets achieves the same thing.

I have been searching their source code trying to find where exactly they achieve this, but I as of yet have been unsuccessful.

I am currently writing a jupyterlab extension in Angular. If I was to be able to achieve data binding syncing between the python kernel and the JavaScript that would be absolutely perfect. My WIP extension is over at https://github.com/SimonBiggs/jupyterlab-form

Could someone who is familiar with either the ipywidgets or declarative widgets code bases be able to point me in the direction of where this data syncing is achieved. That would be absolutely amazing.

Thank you,
Simon

[Jason Grout]

The data syncing happens over comm messages with a very simple syncing protocol. Our protocol is documented at https://github.com/jupyter-widgets/ipywidgets/blob/master/packages/schema/messages.md#widget-messaging-protocol-version-2 (version 2 is implemented in ipywidgets 7).

Jason

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