for ... of example

for-of.js

const combos = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9]
]
// Iterate over array elements
for (const combo of combos)
  console.log(combo)

// Iterate over string characters
const name = 'seb'
for (const letter of name)
  console.log(letter)

// Can't iterate over Object properties
// Workaround: Object.entries(obj) to create an array which can be iterated over
const person = { name, job: 'coder' }
for (const [key, value] of Object.entries(person))
  console.log(`${key} is ${value}`)

// Alternative: Use a Map isntead of an Object
var myMap = new Map(Object.entries(person))
for (const [, value] of myMap) console.log(value)