JSFiddle - React, Tailwind, and code Playground

JavaScript

var obj = {a:"A", b:"B", c:"C"};
 
function foo(a, b) {
   console.log(a,b);
}
           
for(i in obj) {
    var a = obj[i];
    delete obj[i];
    for(j in obj) {
        foo(a, obj[j]);
    }
}