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How to Get the Index of a for-of Loop Iteration in JavaScript 📌[All Method]️

Richard ParkerFebruary 8, 2022

1 minute read

How to Get the Index of a for-of Loop Iteration in JavaScript 📌[All Method]️ — How to Get the Index of a forof Loop Iteration in JavaScript All Method

It’s also a question How to Get the Index of a for-of Loop Iteration in JavaScript? What should you do if you come across a code error! Let’s get started on fixing it.
Question: What is the best way to approach this problem? Answer: Check out this blog code to learn how to fix errors How to Get the Index of a for-of Loop Iteration in JavaScript. Question: What are the reasons for this code mistake and how can it be fixed? Answer: You can find a solution by following the advice in this blog.

The for-of loop changed the way JavaScript (ES6) handles iterables, but accessing indexes like in a traditional for loop can be confusing.

There’s no native feature in the for-of loop that gives us the iteration index.

Luckily, we can use .entries() to access the current index.

The Best Way to Set Up Function Parameters in JavaScript 📌[All Method]️

const arr = ['corgi', 'shih tzu', 'pug'];
for(let elem of arr.entries()) {
  console.log(`Element: ${elem}`);
}
// [0, 'corgi']
// [1, 'shih tzu']
// [2, 'pug']

This means that we can destructure the output of .entries() to obtain the index in the for-of loop.

const arr = ['corgi', 'shih tzu', 'pug'];
for(let [index, elem] of arr.entries()) {
  console.log(`Index: ${index}`);
  console.log(`Element: ${elem}`);
}

Now you learned, How you can use & How to Get the Index of a for-of Loop Iteration in JavaScript.
If you need assistance at any stage, please feel free to contact me.