a mistake in 1.8 Form

[tatesuke]

1.8 Form -> Get index of e.currentTarget between .radio

// jQuery
$(e.currentTarget).index('.radio');

// Native
[].indexOf.call(document.querySelectorAll('.radio'), e.currentTarget);

I think jQuery code is ：

$('.radio').index(e.currentTarget);

[camsong]

Both are supported, if you like the second version, you and make a PR to add it as well.

[tatesuke]

Oh, it was true.
I apologize for my lack of study...