I need some help with one of my projects

[Kernix13]

Knowledge of Music Theory would be helpful, but not necessary. I am creating a Guitar Chord Name app where a user can enter fret #'s of an unknown chord. Clicking a Submit button writes the name of it onto the page, along with additional information.

I have 8 tasks that I need to do and I'm stuck on #5.

Overview: I am using an anonymous function in the event listener and calling a named function (getNotes) inside of it. In that function, I am:

1. Getting the input values (the fret #'s) (DONE)
2. Converting the fret #'s into chromatic notes (DONE)
3. Using innerHTML to add the chord tones onto the page (partially DONE)
4. Creating a 12-note array for each chord tone (DONE)
5. For each note, I need to find the interval for the other notes in relation to that note. I need to use the 12-note arrays from Take inspiration from similar projects #4. (Why are there links attached to these points?)
6. Calculate the chord name based on [Marketing] How to raise the profile of this? #5
7. EXTRA: Output name(s) of chords that have the same notes, if applicable, requires Please add me to your organization #6
8. EXTRA: Output scale(s) that build that chord, requires Please add me to your organization #6

Right now I have a lot of variables in script.js but I am somehow going to have to pull in large JSON files.

PROBLEM: How do I accomplish task #5? Right now I am doing everything inside of a for loop. I was thinking of using a forEach loop, which will work for the 1st item, but how do I cycle back for that item when I get to the 2nd item/note? And then cycle back for notes 1 and 2 when on note 3, etc?

Here is a CodePen Example and my GitHub Repo.

[hiteshvijayhv]

I don't know if I understand your project well but you can use a 2d array or a hashmap that has a pair of time of click and the note. And calculate each time you move from a origin to destination note.

[Kernix13]

I don't understand "hashmap" or "pair of time of click and the note". Is this in reference to #5, because I actually have that one solved but I have additional problems?