voila-embed

Embed jupyter widgets in existing websites.

Demo

Setup:

$ git clone https://github.com/mariobuikhuizen/voila-embed.git
$ cd voila-embed
$ conda create -n ve -c conda-forge -y python voila ipyvuetify=1.0.4 bqplot=0.11 nodejs
$ conda activate ve
(ve)$ pip install -e .

Start example site:

$ conda activate ve
(ve)$ cd example_site
(ve)$ npx serve

Start voilà (in another terminal):

$ conda activate ve
(ve)$ voila --no-browser --template=embed --enable_nbextensions=True --Voila.tornado_settings="{'allow_origin': 'http://localhost:5000'}" --port=8000

Open browser and go to http://localhost:5000

Online demo

Using Heroku for hosting a voila server and github pages as webserver: https://mariobuikhuizen.github.io/voila-embed

Usage

Include the voila-embed.js script in your Vuetify site:

<script src="voila-embed.js"></script>

Add jupyter widgets with:

<jupyter-widget-embed
        voila-url="http://example.com:8000"
        notebook="notebook.ipynb"
        mount-id="my-widget"
></jupyter-widget-embed>

The displayed content while loading can be replaced by specifying your own content within the jupyter-widget-embed tag.

In your notebook set _metadata={'mount_id': 'my-widget'} on a ipyvuetify widget or .add_traits(_metadata=traitlets.Dict(default_value={'mount_id': 'my-widget'}).tag(sync=True)) on any other widget.

See example_site/index.html for an example.

Advanced usage

Widget models can be accessed from the page. With these models events can be sent to the kernel and properties can be changed and observed. Widget models are Backbone.js models.

Get a reference to a widget model

requestWidget({
    voilaUrl: 'http://localhost:8000',
    notebook: 'notebook2.ipynb',
    mountId: 'event_demo',
}).then(widgetModel => {
    ...
});

Send an event

...
}).then(widgetModel => {
    this.widgetModel = widgetModel
});
...
this.widgetModel.send({
    event: 'click',
    data: {},
});

There are three kinds of events:

1. When e.g. .on_event('click', my_fn) on a Vuetify subclass is used, the click event can be triggered by sending: { event: 'click', data: {...} }.
2. When e.g. @click="my_fn()" on a VuetifyTemplate subclass is used, the click event can be triggered by sending: { event: 'my_fn', data: {...} }.
3. A custom event can be sent by sending any object. The Widget needs to implement a handler for this event: self.on_msg(my_handler), this handler should inspect the content of the message to determine if it is the intended recipient.

Access properties

• Read a property: widgetModel.get('my_prop')
• Set a property: widgetModel.set('my_prop', 42) and widgetModel.save_changes()
• Listen to changes: widgetModel.on('change:my_prop', () => { this.myProp = widgetModel.get('my_prop') })

See Backbone.js for more info.