Adverb position of "initially"

Question

I wrote

It is mainly a recursive function that initially is called with the root node of the DOM tree (body element) and traverses the nodes in the dept-first manner.

Should it be "that is initially called"?

Answer 1

Depending on the style, adverbs are put at various places. There is no one rule on that. However, I'd write this as...

Mainly, it is a recursive function that is initially called ....

Others may have their versions...