javascript when to use a for of code example

Example 1: how to use for of in javascript

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

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

Example 2: for of and for in javascript

let arr = ['el1', 'el2', 'el3'];

arr.addedProp = 'arrProp';

// elKey are the property keys
for (let elKey in arr) {
  console.log(elKey);
}

// elValue are the property values
for (let elValue of arr) {
  console.log(elValue)
}