How to get value at a specific index of array In JavaScript?

I have an array and simply want to get the element at index 1.

var myValues = new Array();
var valueAtIndex1 = myValues.getValue(1); // (something like this)

How can I get the value at the 1st index of my array in JavaScript?

7 Answers

Just use indexer

var valueAtIndex1 = myValues[1];

You can use at method from Array.prototype as follows:

var valueAtIndex1 = myValues.at(1);

See more details at MDN documentation.

Array indexes in JavaScript start at zero for the first item, so try this:

var firstArrayItem = myValues[0]

Of course, if you actually want the second item in the array at index 1, then it's myValues[1].

You can just use []:

var valueAtIndex1 = myValues[1];

indexer (array[index]) is the most frequent use. An alternative is at array method:

const cart = ['apple', 'banana', 'pear'];
cart.at(0) // 'apple'
cart.at(2) // 'pear'

If you come from another programming language, maybe it looks more familiar.

shift can be used in places where you want to get the first element (index=0) of an array and chain with other array methods.

example:

const comps = [{}, {}, {}]
const specComp = comps .map(fn1) .filter(fn2) .shift()

Remember shift mutates the array, which is very different from accessing via an indexer.

You can use [];

var indexValue = Index[1];

With ES2022 you can use Array.prototype.at():

const myValues = [1, 2, 3]
myValues.at(1) // 2

at() also supports negative index, which returns an element from the end of the array:

const myValues = [1, 2, 3]
myValues.at(-1) // 3
myValues.at(-2) // 2