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Create a comma separated list from an array in JavaScript

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In this article, we will see how to convert an array into a comma-separated list using JavaScript. To do that, we are going to use a few of the most preferred methods.

Methods to Create Comma Separated List from an Array:

Method 1: Array join() method

This method joins the elements of the array to form a string and returns the new string. The elements of the array will be separated by a specified separator. If not specified, the Default separator comma (, ) is used. 

Syntax:

array.join(separator)

Parameters:

  • separator: This parameter is optional. It specifies the separator to be used. If not used, a Separated Comma(, ) is used.

Example: This example joins the element of the array by the join() method using a comma(, )

Javascript

// Input array
let arr = ["GFG1", "GFG2", "GFG3"];
 
// Function to create and
// display comma separated list
function gfg_Run() {
    console.log("Comma Separates List: " + arr.join(", "));
}
 
gfg_Run();

                    

Output
Comma Separates List: GFG1, GFG2, GFG3

Method 2: Array toString() method

This method converts an array into a String and returns the new string. 

Syntax:

array.toString()

Return value:

It returns a string that represents the values of the array, separated by a comma.

Example: This example uses the toString() method to convert an array into a comma-separated list. using Array literal

Javascript

// Input array
let arr = ["GFG1", "GFG2", "GFG3"];
 
// Function to create and
// display comma separated list
function gfg_Run() {
    console.log("Comma Separated List: " + arr.toString());
}
 
gfg_Run();

                    

Output
Comma Separated List: GFG1,GFG2,GFG3

Method 3: Using Array literals

It is the list of expressions containing array elements separated with commas enclosed with square brackets.

Example: This example uses the normal array name and does the same work. 

Javascript

// Array litral declaration
let arr = ["GFG1", "GFG2", "GFG3"];
 
// Function to display
// comma separated list
function gfg_Run() {
    console.log("Comma Separated List: " + arr);
}
 
gfg_Run();

                    

Output
Comma Separated List: GFG1,GFG2,GFG3

Method 4: Using Lodash _.join() method

In this appraoch, we are using Lodash _.join() method that return the list of given array with “,” separation.

Example: This example shows the use of Lodash _.join() method.

Javascript

// Requiring the lodash library
let _ = require("lodash");
 
// Original array to be joined
let array = [1, 2, 3, 4, 5, 6];
 
let newArray = _.join(array);
// Printing newArray
console.log("After Join: " + newArray);

                    

Output:

After Join: 1,2,3,4,5,6


Last Updated : 20 Dec, 2023
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