It seemed pretty clear it was making jokes to me.

From just above the joke about JavaScript and Java:

> Whether they use it in their job or just to make coffee (coffee-maker).

> But it’s not normal rapper like Eminem, it’s more like:

or further above:

> Some describe its usage — like anti-ecological tree-kill, some not

> [Image of ducks/birds idk] JavaScript developers pictured trying to find their way around in node_modules directory :(

I never got a serious feel at all.