How to get the first element of an array in JavaScript

#javascript #array

Last updated on Sep 24, 2020 by Suraj Sharma



In this tutorial, you will learn 3 different ways to get the first element of an array in JavaScript



1. Using element index


JavaScript arrays are zero-indexed, that means the index of the first element is 0 and the last element is at index (array’s length - 1).


const array = ['India', 'United States', 'Brazil'];

const firstElement = array[0]; // 'India'

const lastElement = array[array.length-1]; // 'Brazil'


2. Using Array.slice() method


We can use the slice() method to get the first element of a JavaScript array by passing 0 as a first parameter and 1 as a second parameter.

It returns a new array of length 1.


const array = ['India', 'United States', 'Brazil'];

const subArray = array.slice(0, 1); // ['India']


3. Using Array destructuring


The Array destructuring assignment introduced in ES6 can help us get the first element of an array.


const array = ['India', 'United States', 'Brazil'];

const [firstElement] = array; 

console.log(firstElement) // 'India';


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Suraj Sharma is a JavaScript Software Engineer. He holds a B.Tech degree in Computer Science & Engineering from NIT Rourkela.