[franciscop]

Copy/paste from another answer:

Nop, but if you want to be fair jQuery's addClass is also not implemented in those 29 lines of code, it also uses these: each, jQuery.isFunction, getClass and stripAndCollapse.

Umbrella's single eacharg() uses in exchange .each() (which is public-facing, so it really doesn't count) and .args(), which is private but used in MANY places through the code. At 11 lines for args(), I'd say proportionally it'd be 1-3 lines corresponding to addClass. So worst-case scenario it'd be the equivalent to 8 lines exclusive for a much more flexible function with no internal dependencies which is still alot less than jQuery's 29 lines with 3 internal dependencies and 1 external.

Edit: the magic for the size of Umbrella JS is really through heavy code reuse and modern API usage. For this example, el.classList.add(name);

[derimagia]

Doesn't matter what jquery vs umbrella is, if you're wrong from the start then everything you're basing your argument is also misleading. Not saying jQuery doesn't have more lines, but the reasons for it aren't going to be discussed if you use helper functions as your example.