How to remove duplicate words from an array in JavaScript?

August 9, 2020•#javascript

In this article, you will learn how to remove duplicate words from an array in JavaScript.

That’s the array of duplicate words that we have:

let duplicate_words = [
  "camera",
  "signature",
  "camera",
  "guitar",
  "guitar",
  "camera",
];

By default, a set cannot have duplicate elements. So, we can remove duplicate words from an array by converting it to a set.

let words_set = new Set(duplicate_words);

If we log the set to the console, we will get:

console.log(words_set); // Set(3) {"camera", "signature", "guitar"}

We need it as an array, so we will convert the set back to an array using the spread operator.

let words = [...words_set];

Now, log the words to the console.

console.log(words); // ["camera", "signature", "guitar"]

The duplicate words have been removed from the array successfully!