for of and for in loop javascript code example

Example 1: javascipr for of

const array1 = ['a', 'b', 'c'];

for (const element of array1) {
  console.log(element);
}

// expected output: "a"
// expected output: "b"
// expected output: "c"

Example 2: how to use for of in javascript

const array1 = ['a', 'b', 'c'];

for (const element of array1) {
  console.log(element);
}

Example 3: for in and for of in js

Object.prototype.objCustom = function () {}; 
Array.prototype.arrCustom = function () {};

let iterable = [3, 5, 7];
iterable.foo = "hello";

for (let i in iterable) {
  console.log(i); // logs 0, 1, 2, "foo", "arrCustom", "objCustom"
}

for (let i of iterable) {
  console.log(i); // logs 3, 5, 7
}

Example 4: es6 for-of loop

for (let itme of list) {
  ...
}