respect snake case for datasets

[elShiaLabeouf]

Hey @jonobr1 :)

I've come up with a small fix for the data attributes that have 2+ hyphens. I didn't take into account that js .dataset property had data attributes in camelCase, which made it rendered like this:

Found the proper way to copy dataset from an element to another here https://stackoverflow.com/a/20074111 Having this, data attributes are rendered accurately:

[jonobr1]

Thanks!

I'm curious why you changed from a for statement to an Object.assign. Do SVG elements not need to setAttribute?

[elShiaLabeouf]

Splendid!

I assume if an HTML element (not only SVG) has a dataset, its data attributes are rendered by javascript automatically via an under-the-hood magic