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jupyter-offlinenotebook

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Save and load notebooks to local-storage

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# Jupyter Offline Notebook

[![Binder](https://mybinder.org/badge_logo.svg)](https://mybinder.org/v2/gh/manics/jupyter-offlinenotebook/main?urlpath=lab%2Ftree%2Fexample.ipynb)
[![PyPI](https://img.shields.io/pypi/v/jupyter-offlinenotebook.svg)](https://pypi.python.org/pypi/jupyter-offlinenotebook)
[![npm](https://img.shields.io/npm/v/jupyter-offlinenotebook)](https://www.npmjs.com/package/jupyter-offlinenotebook)
[![Build Status](https://github.com/manics/jupyter-offlinenotebook/workflows/Build/badge.svg)](https://github.com/manics/jupyter-offlinenotebook/actions)

Save and load notebooks to browser storage, even if you've lost your connection to the server.

## Installation

pip install jupyter-offlinenotebook

This should automatically enable the extension on Jupyter Notebook and JupyterLab.

This extension supports [JupyterLab 4](https://jupyterlab.readthedocs.io/), [Notebook 7](https://jupyter-notebook.readthedocs.io/) and [Jupyter Server 2](https://jupyter-server.readthedocs.io/).
Use [0.3.2](https://github.com/manics/jupyter-offlinenotebook/tree/v0.3.2) for older versions.

## Usage

![Offline notebook buttons](https://raw.githubusercontent.com/manics/jupyter-offlinenotebook/main/offline-notebook-buttons.png)

You should see up to five new buttons depending on your configuration and where you are running the notebook:

- download the in-memory (browser) state of the notebook
- save the in-memory state of the notebook to local-storage
- load a notebook from local-storage
- open the permanent URL of the repository containing this notebook
- copy the permanent mybinder URL to share this repository

Saving and loading uses the repository ID and the path of the current notebook.

You should always see the `Download` button.
If you are running this on mybinder all buttons should be visible.
See the configuration section below to enable the other buttons on other systems.

If you don't see the buttons check the Javascript console log.

See [example.ipynb](./example.ipynb)

## Configuration

This extension can be configured in `jupyter_notebook_config.py` by setting the following properties of `c.OfflineNotebookConfig`:

- `repository_id`:
  A callable that returns the repository ID.
  This is used when storing and retrieving notebooks.
  Default is the value of the `BINDER_REPO_URL` environment variable.
- `repository_ref_url`:
  A callable that returns the repository reference URL.
  Default is the value of the `BINDER_REF_URL` environment variable.
- `binder_persistent_url`:
  A callable that returns the repository reference URL.
  Default is the values of the `BINDER_LAUNCH_HOST` and
  `BINDER_PERSISTENT_REQUEST` environment variables.
- `binder_repo_label`:
  A callable that returns the label used to link to the repository.

# Warning

This extension is still in development.
Breaking changes may occur in future.

There are [several major limitations](https://github.com/manics/jupyter-offlinenotebook/issues) including:

- Local-storage is limited by quotas imposed by the browser.
- A repository ID and path of the notebook within Jupyter Notebook are used, joined by a ` `.
  This may change in future.

# Development notes

This extension stores notebooks in browser storage using the [IndexedDB API](https://developer.mozilla.org/en-US/docs/Web/API/IndexedDB_API), wrapped with [Dexie.js](https://dexie.org/).

One server API call is made during initialisation to obtain the storage configuration.
Everything else is done client-side so should work even if the server is disconnected.

Install the development dependencies:

pip install -r dev-requirements-jl4.txt

To build and install the development version:

pip install .

This automatically runs `jlpm`.

The notebook and server extensions should be automatically enabled.

JupyterLab 3+ supports the installation of extensions as a static package so no further steps are required.

Tagged releases of this repository are automatically published to [PyPI](https://pypi.python.org/pypi/jupyter-offlinenotebook) and [NPM](https://www.npmjs.com/package/jupyter-offlinenotebook).

To test that the binder and repo buttons work when developing locally set some placeholder environment variables, e.g.:

```
BINDER_LAUNCH_HOST=http://localhost BINDER_REPO_URL=http://localhost BINDER_PERSISTENT_REQUEST=v2/gh/repo BINDER_REF_URL=http://localhost jupyter-lab --debug
```

If you make any changes remember to run all linters and auto-formatters:

- `pre-commit run -a`
- `jlpm run format`

jupyter-offlinenotebook

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