How to add a key to an object when I don't know what it will be called?

Question

JavaScript

how to add a key to an object when I don't know what it will be called. For example, I will iterate over the values ​​from the array and substitute as a key in the object. Or pass key values ​​through a parameter in a function?

const ass = {};

function insert (key,val){
  ass.key = val;
  console.log(ass);
}

insert(22,"Ivan")

Prints key: "Ivan" . How to make it output 22: "Ivan" ?

Answer 1

ass[key] = val;