JSFiddle - React, Tailwind, and code Playground

JavaScript

var a = { 
  a: 1, 
  af: function() { console.log(this.a) }
};
var b = { 
  b: 2, 
  bf: function() { console.log(this.b) }
};

var c = {};
for (var p in a)
    if(a.hasOwnProperty(p))
         c[p] = a[p];
for (var p in b)
    if(b.hasOwnProperty(p))
         c[p] = b[p];
       
console.log(c);