Javascript: Questing my proformance

so I’m in intermediate algorithm and I just can’t think.
my mind is blank, not one of the codes we have learned comes to mind until I google then it’s like oh yeah I remember that. so what do I do start over until I can remember or is this normal?

Your code so far

function spinalCase(str) {
  // "It's such a fine line between stupid, and clever."
  // --David St. Hubbins
  return str;

spinalCase('This Is Spinal Tap');

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:68.0) Gecko/20100101 Firefox/68.0.

Link to the challenge:

Having to look up methods repeatedly is normal. Eventually you have used some of them so many times you can do it without thinking about it.

feel so brain dead at this point trying to get it to sticking my head im doing several thinks like solo learning app.