Hi guys i need some help with "Technical documantation page"

Each .main-section should have an id that matches the text of its first child, having any spaces in the child’s text replaced with underscores (_ ) for the id’s.

Such that if your <h2> is “What you should already know”

then the id of the parent section element would be


Since you have to replace the whitespace with underscore.

Do you get what I mean?