echarts4r VS plotly.js

You can also use Apache Echarts through R with this package: https://echarts4r.john-coene.com/

This might shock you, but open-source software is an open and collaborative effort. If you think that the example with two Y-axes undermines this entire project, you can go to the echarts4r github repository, open a pull request (the website is made via pkgdown), and propose improvements to the documentation. Maybe do something good instead??

Plotly is based on D3. Has both open-source version and paid option.

https://plotly.com/javascript/

Plotly as our chart renderer

In this lesson, we will go through the steps of using Plotly.js in React. Plotly.js is an Open Source Graphing Library. At the end of this lesson, you should be able to do a simple plot with Plotly.js.

Well, MathML[1] support is (nearly) everywhere now, and as the docs say:

MathML Core is a subset with increased implementation details based on rules from LaTeX and the Open Font Format. It is tailored for browsers and designed specifically to work well with other web standards including HTML, CSS, DOM, JavaScript.

I don't have a lot of experience working with this stuff (yet) but if you can script your MathML objects with Javascript, you should be able to make whatever interactive "stuff" you want in terms of math notation. Now drawing objects and plots and stuff is a different question.

There's stuff like Plotly[2], D3[3], Sigma[4], etc. that might be useful depending on exactly what effects you're going for.

[1]: https://developer.mozilla.org/en-US/docs/Web/MathML

[2]: https://github.com/plotly/plotly.js

[3]: https://d3js.org/

[4]: https://www.sigmajs.org/

This is the end of the lesson. For more information on Plotly.js, check the documentation Plotly.