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

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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?

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?

• javascript

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8 Answers 8

Sorted by: Reset to default 224

You can access an element at a specific index using the bracket notation accessor.

var valueAtIndex1 = myValues[1];

On newer browsers/JavaScript engines (see browser compatibility here), you can also use the .at() method on arrays.

var valueAtIndex1 = myValues.at(1);

On positive indexes, both methods work the same (the first one being more common). Array.prototype.at() however allows you to access elements starting from the end of the array by passing a negative number. Passing -1 will give the last element of the array, passing -2 the second last, etc.

See more details at the 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].

See Accessing array elements for more info.

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.

Update 2022

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

Read more: MDN, JavascriptTutorial, Specifications

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.

As you specifically want to get the element at index 1. You can also achieve this by using Array destructuring from ES6.

const arr = [1, 2, 3, 4];
const [zeroIndex, firstIndex, ...remaining] = arr;
console.log(firstIndex); // 2

Or, As per ES2022. You can also use Array.at()

const arr = [1, 2, 3, 4];
console.log(arr.at(1)); // 2

• your_array[0]
• your_array?.[0] (with NPE check)

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