How to Use the Array join() Method in JavaScript

In this article, I will introduce how to use the array join() method in JavaScript.

The join() method

You can use the join() method to join each element in the array to create a new string.

The syntax is below.

array.join()
//or
array.join(separator)

array.join()

If no argument is specified, a comma is specified as the separator.

Below is a sample.

const array = ["Apple", "Banana"];
console.log(array.join());
//"Apple,Banana"

array.join(separator)

If you specify a separator, all elements in the array are joined with the specified separator.

Below is a sample.

const array = ["Apple", "Banana", "Lemon"];

console.log(array.join(""));
//"AppleBananaLemon"

console.log(array.join(" "));
//"Apple Banana Lemon"

 console.log(array.join(", "));
//"Apple, Banana, Lemon"

console.log(array.join(" + "));
//"Apple + Banana + Lemon"