# Real time collaborative binder instance

**URL:** <https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274>\
**Category:** Binder\
**Tags:** jupyterlab, help-wanted\
**Created:** [December 19, 2021, 12:34am UTC](https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274 "2021-12-19T00:34:29Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![Mercury](https://avatars.discourse-cdn.com/v4/letter/m/e95f7d/32.png) [@Mercury](https://discourse.jupyter.org/u/Mercury)\
**Post date:** [December 19, 2021, 12:34am UTC](https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274/1 "2021-12-19T00:34:29Z")

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Hi there,

I’m fairly new to the jupyter-project and want to create a binder instance, where I can invite my friends, so we can code together in real time. I saw lots of discussions on this topic.

This one gave me a starting point:

> [@What is installed by default with Binder?](https://discourse.jupyter.org/t/what-is-installed-by-default-with-binder/10217):
>
> I understand that Binder build the environment specified in my repo (e.g., for Python, using requirements.txt) but even with an empty specification, there’s a lot already in the Binder environment. The necessaries for Jupyter Lab, of course, but a lot more too it seems. E.g. I can import ipywidgets without error. What Python packages are installed by Binder by default (e.g., what is its requirements.txt); and what additional Jupyter Lab configuration is preformed by default (e.g., what jupyter …

Here I tried to create such a repo, but unfortunate the shared link won’t sync the changes in real time.  
Only if the other person F5 after each change on my side:

> **[GitHub - theRoboxx/jupyter-notebook-for-binder](https://github.com/theRoboxx/jupyter-notebook-for-binder)**
>
> Contribute to theRoboxx/jupyter-notebook-for-binder development by creating an account on GitHub.

I also installed jupyter-lab on my machine and started it with `jupyter lab --collaborative`  
(tested for jupyterlab version 3.1.8 and 3.2.5) like written here:

(I cannot post more than two links, so the docs-link will be in the first comment below)

Unfortunate, this didn’t work either, because I couldn’t create a link with the `jupyterlab-link-share` extension.

Does anyone know if the collaborative-feature works at the moment? And if so, what am I doing wrong in the repo or my jupyter-lab ?

Thanks a lot in advance :).

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**Author:** ![Mercury](https://avatars.discourse-cdn.com/v4/letter/m/e95f7d/32.png) [@Mercury](https://discourse.jupyter.org/u/Mercury)\
**Post date:** [December 19, 2021, 12:35am UTC](https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274/2 "2021-12-19T00:35:37Z")

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[https://jupyterlab.readthedocs.io/en/stable/user/rtc.html](https://jupyterlab.readthedocs.io/en/stable/user/rtc.html)

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**Author:** ![krassowski](https://yyz1.discourse-cdn.com/flex031/user_avatar/discourse.jupyter.org/krassowski/32/1685_2.png) [@krassowski](https://discourse.jupyter.org/u/krassowski)\
**Post date:** [December 19, 2021, 3:55pm UTC](https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274/3 "2021-12-19T15:55:45Z")

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Yes, it does. Here is one example: [JupyterLab 3.2.5 · GitHub](https://gist.github.com/jtpio/6ce26381703355e0ef1da4af742b7f72)  
and another one here: [README.md · GitHub](https://gist.github.com/krassowski/d04237b264202e19888fc7b4ceff4864)

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<div class="post-metadata">

**Author:** ![Mercury](https://avatars.discourse-cdn.com/v4/letter/m/e95f7d/32.png) [@Mercury](https://discourse.jupyter.org/u/Mercury)\
**Post date:** [December 19, 2021, 7:13pm UTC](https://discourse.jupyter.org/t/real-time-collaborative-binder-instance/12274/4 "2021-12-19T19:13:32Z")

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Thank you very much 👍 !