Where is the best place for front-end src?

[ShGKme]

If /public folder consist built styles, js, bundels and other webpacked, gulped files, then where should I place src like less|sass|js ect.?
In some php frameworkes I saw something like ./Assets`` folder with all src, that supposed to be built to the ./public`.

[mytharcher]

I think the best place for front-end src is another repository unless you need SSR.