How to Get the Current Element's Index in a JavaScript forEach Loop?

In the JavaScript Array.prototype.forEach() method, you can get the index of the current element in the loop by using the (optional) second parameter of the callback function, for example, like so:

const arr = ['apple', 'banana', 'orange'];

arr.forEach((item, index) => {
  console.log(`${index}: ${item}`);
});

In this example, the callback function to Array.prototype.forEach() method has two parameters (i.e. the current element and its index). It produces the following output:

// '0: apple'
// '1: banana'
// '2: orange'