Answer by JSON C11 for Iterate through object properties

If your environment supports ES2017 then I would recommend Object.entries:

Object.entries(obj).forEach(([key, value]) => {
  console.log(`${key} ${value}`);
});

As shown in Mozillas Object.entries() documentation:

The Object.entries() method returns an array of a given object's own enumerable property [key, value] pairs, in the same order as that provided by a for...in loop (the difference being that a for-in loop enumerates properties in the prototype chain as well).

Basically with Object.entries we can forgo the following extra step that is required with the older for...in loop:

// This step is not necessary with Object.entries
if (object.hasOwnProperty(property)) {
  // do stuff
}