How can i modify indexing in a single object in javascript

I have an object list to store indexes just like that:

const initialIndexes = {
  0: [0,1,2],
  1: [0,1]
}

At this point I have a highlightedResultIndex variable. It gives an index like this:

highlightedResultIndex = 0 - case 1
highlightedResultIndex = 4 - case 2
highlightedResultIndex = 2 - case 3
...

And I finally try to get the following results by highlightedResultIndex

For the case 1:

result = {
 0: 0, // index from initialIndexes
 1: -1
}

For the case 2:

result = {
  0: -1,
  1: 1  // index from initialIndexes
}

For the case 3:

result = {
 0: 2  // index from initialIndexes
 1: -1
}

Maybe there is an easy method or there may be a certain algorithm for this, but I didn’t know how to research it so I wanted to write it here. I would be glad if you help.