TypeError: undefined is not iterable (cannot read)

[simsimjae]

Hello, I found a bug while I was using your library.

After analyzing the cause by hanging the debug point, it seems that if there is another svg on the page where the slider is rendered when selecting the svg by d3, it is a problem caused by not being selected exactly.

Is it okay if I send a PR message about this problem?

[shwilliam]

Hey @simsimjae, absolutely! A PR would be much appreciated 🙏