JavaScript Array join Method (Live Playground)

The JavaScript Array join method creates a new string by concatenating all elements of the array separated by commas or a specified separator string.

Here is a simple example of how to use the join method:

let fruits = ['apple', 'banana', 'cherry'];
let result = fruits.join();

console.log(result);
// Expected output:
// 'apple,banana,cherry'

In the example above, join concatenates all the elements of the fruits array into a single string separated by commas.

Live Playground, Try it Yourself

You can specify a different separator like this:

let fruits = ['apple', 'banana', 'cherry'];
let result = fruits.join(' and ');

console.log(result);
// Expected output:
// 'apple and banana and cherry'

In this case, fruits.join(' and ') concatenates the elements of the fruits array into a single string, where each element is separated by the string ' and '.

Live Playground, Try it Yourself

The join method can be incredibly useful when you need to create a string from an array of elements.