Discussion on: Problems with Using for...in on Arrays in JavaScript

array = [4, "some text", true];

for (let i in array) {  //  in for..in 'i' returns index
  console.log(i); // 0, 1, 2
  console.log(typeof i); // string, string, string
  console.log(array[i]); // 4, some text, true
}

for (const el of array) {   //  in for..of 'el' returns element
  console.log(el);  // 4, some text, true
  console.log(typeof el);   // number, string, boolean
}