Use modern native ES6 import to load plotly.js bundle instead of requirejs which is no longer under active development

[marthacryan]

Note: this PR breaks support for notebook < 7. #4805 is already working on removing that code and adding a warning.

This removes references in the base renderers to requirejs. Requirejs is essentially unmaintained and newer versions of jupyter lab and jupyter notebook don't support it anymore, so this fixes some of the notebook 7 and lab 4 issues we've been seeing. Replaces requirejs support with native javascript modules: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules

Alternative to #4762 that doesn't remove the CDN.

Fixes #4336.

[archmoj]

Great PR.
Please add a changelog also please mention if it is fixing #4336?

[marthacryan]

Note: the orca tests are also failing on master

[alexcjohnson]

💃 I'm on board - not aware of any good use cases for requirejs here. Maybe there were in the past, but mostly those use cases would have applied to direct plotly.js use rather than plotly.py anyway.

[archmoj]

Please update the description of the PR and include links & info about requirejs.

[archmoj]

Great PR 🏆
Nicely completed.
💃

[archmoj]

@LiamConnors do you have permission to merge this?

[LiamConnors]

@marthacryan and @archmoj, when building Plotly.py using this PR and the master branch of Plotly.js, figures don't load in a classic notebook and the following error is in the console.

[gvwilson]

@archmoj @marthacryan please sync with @LiamConnors about the issue he flagged (previous comment in this thread)

[LiamConnors]

Regarding the error saw in my previous comment. It only is an issue with notebook<7

[archmoj]

Is there any blocker for merging this PR?

[marthacryan]

Is there any blocker for merging this PR?

@archmoj @LiamConnors @gvwilson I believe there isn't anything blocking merging since Liam was able to use this with Notebook 7.

[archmoj]

💃

[gvwilson]

merge it!