What to do if there are compatibility issues with html + react and django cms?

Question

JavaScript

In general, the problem is that, for example, we have a div block that is created via cms. Here's what it looks like:

Where 1, there is an array in the form of a string, but then it turns into a js array through js
Where 2, the same thing
3 - option should be displayed from array 1
4 - the price changes dynamically, depending on the selected option

The problem is that there can be a bunch of such blocks and everything needs to be displayed correctly, that is, to make a universal solution. You can use native js, react, but so that all the layout is still in html, and the rest is through js and react