Good, now we have a starting point. So now, what is the length of stringArray immediately after its declaration?

It looks like this:
let stringArray = [];

I am learning JavaScript in the school I am going to and I watched a video with this Kata challenge in it. I followed what they did in the video. I am not able to send the video.

what does the first appearence of stringArray in your code look like?

I am not sure how to get it to log each sequential variation.

well then, you're not carefully logging the sequential variations of stringArray thoroughly enough

The thing is, when I console log the stringArray I only get an empty array in the console.

(I was looking at the other parts as well and it adds a trailing whitespace at the end of every string.)

What exactly are the first three (3) lengths of stringArray throughout your code while attempting this test case?

I am pretty sure yes. The whitespace gets added in the .join() method at the end. I came to that conclusion when I removed the whitespace inside the .join() property which removed the trailing whitespace at the end of emocleW. Although, I can't leave it like that because it also removes all of the whitespaces in the other strings. I added in a couple if statements to see if that would help at all but it didn't do anything.

you logged all the steps to the construction of stringArray? you're aware of its length at all times?

you could console.log() the steps of your code to see how you're getting your result...

I know about the trailing whitespace. I am not sure why it is being put there. How would I fix that?

3. Your code returns with an extra trailing whitespace, see error message:

expected 'emocleW ' to equal 'emocleW'

2. A kata issue is only for when you can show there is a problem with the kata, not if you can't solve it. Instead post as a question.