Seeking guidance on how Plotly/Dash vendors 3rd party javascript

Matt_D · July 3, 2025, 2:46pm

Hi, I have a question how Plotly ends up vendoring 3rd party javascript code.

There’s another python project I am attempting to make a contribution for that is requiring us to vendor javascript code (essentially a no-web option), so that the reports work for systems that do not have the internet.

github.com/bloomberg/memray

--no-web Packaging Option

opened 01:26PM - 27 Sep 23 UTC

Delengowski

enhancement good first issue

### Is there an existing proposal for this? - [X] I have searched the existing …proposals ### Is your feature request related to a problem? I have an issue utilizing the flamegraph and table output options when using memray on an airgapped system. Since the system does not have internet access, connecting to the CDNs to get the javascript is not possible and the web pages aren't fully loaded. ### Describe the solution you'd like I would like it if memray would in a `--no-web` packaging option that would include the necessary html/css/js files as part of memray and have the the generated html to point accordingly. ### Alternatives you considered Putting the files on the air gapped system and changing the links the html to point to the local file system path.

I’m struggling to deduce how to do that. I believe it will require adding a no-web build option for the pip package, but I am really lost on how to go about pulling in the required javascript libraries at build to vendor them.

Would the developers of Plotly/Dash be able to provide me with some tips to how its done for these projects? Something I can reference to get started? I assume you must as Dash has AG-Grid.

jinnyzor · July 3, 2025, 5:11pm

Hello @Matt_D,

Welcome to the community!

Dash uses 3rd party React components by importing the libraries into the component. It is possible to use a similar structure to your package to include the JS files and have Dash cater them automatically.

You can see an example here:

github.com/BSd3v/dash-yada

dash_yada/init.py

dev

from __future__ import print_function as _
from ._imports_ import *
from ._imports_ import __all__
import os as _os
import sys as _sys
import json

_basepath = _os.path.dirname(__file__)
_filepath = _os.path.abspath(_os.path.join(_basepath, "package-info.json"))
with open(_filepath) as f:
    package = json.load(f)

package_name = package["name"].replace(" ", "_").replace("-", "_")
__version__ = package["version"]

_current_path = _os.path.dirname(_os.path.abspath(__file__))

_this_module = _sys.modules[__name__]

_unpkg = f"https://unpkg.com/dash-yada@{__version__}/dash_yada/"

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Seeking guidance on how Plotly/Dash vendors 3rd party javascript

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