Name collision between geojson and json?

[RobinL]

Building the following Dockerfile

FROM jupyter/datascience-notebook

# See https://github.com/jupyterlab/jupyter-renderers
# Note there seems to be a bug that means you need to install json before geojson
RUN jupyter labextension install @jupyterlab/json-extension
RUN jupyter labextension install @jupyterlab/geojson-extension

docker build -t jldebug .

and then running:

 docker run -d -p 8888:8888 jldebug start.sh jupyter lab --NotebookApp.token=''

causes the browser to hang.

Looking in Devtools, we see that mimeExtensions contains:

{MIME_TYPE: "application/pdf", PDF_CLASS: "jp-PDFViewer", PDF_CONTAINER_CLASS: "jp-PDFContainer", rendererFactory: {…}, RenderedPDF: ƒ, …}

{VEGA_MIME_TYPE: "application/vnd.vega.v2+json", VEGALITE_MIME_TYPE: "application/vnd.vegalite.v1+json", rendererFactory: {…}, default: {…}, RenderedVega: ƒ, …}

{MIME_TYPE: "application/json", rendererFactory: {…}, default: Array(1), __esModule: true, RenderedJSON: ƒ}

{MIME_TYPE: "application/geo+json", rendererFactory: {…}, default: Array(1), __esModule: true, RenderedGeoJSON: ƒ}

```

But when the mimeExtensions are turned into plugins in the main JupyterLab application class we get:

```

{id: "jupyter.services.mimerenderer-PDF", requires: Array(1), autoStart: true, activate: ƒ}

{id: "jupyter.services.mimerenderer-vega", requires: Array(1), autoStart: true, activate: ƒ}

{id: "jupyter.services.mimerenderer-undefined", requires: Array(1), autoStart: true, activate: ƒ}

{id: "jupyter.services.mimerenderer-undefined", requires: Array(1), autoStart: true, activate: ƒ}

```

This causes 
```
index.js:89 Uncaught Error: Plugin 'jupyter.services.mimerenderer-undefined' is already registered.
```

Everything seems to be fine so long as only one of these plugins is included in the dockerfile

[RobinL]

A little more investigation seems to identify inconsistency between implementation in various plugins -
e.g.:
https://github.com/altair-viz/jupyterlab_voyager/blob/1a9a23cbc42b07905f92371f5f398293c1488ffa/src/index.ts#L68

causes this to appear with plugin id jupyter.services.mimerendererer-I don't know what this does

whereas

jupyter-renderers/packages/plotly-extension/src/index.tsx

Line 128 in bce6bd3

id: '@jupyterlab/plotly-extension:factory',

has no name, and appears with plugin id jupyter.services.mimerenderer-undefined

[gnestor]

@blink1073 Does this make sense to you?

[blink1073]

This was fixed by jupyterlab/jupyterlab#3148, by running pip install jupyterlab==0.28.12, it now properly detects compatibility of mime renderer extensions.

[gnestor]

Feel free to re-open if upgrading to jupyterlab 0.28.12 doesn't not resolve this for you.