1Object.entries(obj).forEach(
2    ([key, value]) => console.log(key, value)
3);

1// object to loop through
2let obj = { first: "John", last: "Doe" };
3
4// loop through object and log each key and value pair
5//ECMAScript 5
6Object.keys(obj).forEach(function(key) {
7    console.log(key, obj[key]);
8});
9
10//ECMAScript 6
11for (const key of Object.keys(obj)) {
12    console.log(key, obj[key]);
13}
14
15//ECMAScript 8
16Object.entries(obj).forEach(
17    ([key, value]) => console.log(key, value)
18);
19
20// OUTPUT
21/*
22   first John
23   last Doe
24*/

1// Looping through arrays created from Object.keys
2const keys = Object.keys(fruits)
3for (const key of keys) {
4  console.log(key)
5}
6
7// Results:
8// apple
9// orange
10// pear
11

1var obj = { first: "John", last: "Doe" };
2
3Object.keys(obj).forEach(function(key) {
4    console.log(key, obj[key]);
5});

1for (var property in object) {
2  if (object.hasOwnProperty(property)) {
3    // Do things here
4  }
5}
6

1var obj = {
2  first: "John",
3  last: "Doe"
4};
5
6//
7//	Visit non-inherited enumerable keys
8//
9Object.keys(obj).forEach(function(key) {
10
11  console.log(key, obj[key]);
12
13});