JavaScript Array findLast() Method

The JavaScript findLast() method is used to retrieve the last element in an array that meets a specified condition.

Example 1: This example shows how findLast() can be used to find the last even number in an array.

const a = [1, 3, 5, 7, 6, 8];
const b = a.findLast(num => num % 2 === 0);
console.log(b);

Output :

8

Example 2: This example shows how findLast() can be used to find the last string in an array that has more than 3 characters.

const a = ['cat', 'dog', 'elephant', 'lion'];
const b = a.findLast(word => word.length > 3);
console.log(b); 

Output:

'elephant'

Syntax :

array.findLast(callback(element[, index[, array]])[, thisArg]);

• callback: A function to test each element, receiving the current element, index, and array.
• thisArg (optional): A value to use as this when executing callback.

JavaScript Array findLast() Method - FAQs

What is findLast in JavaScript?

The findLast() method returns the last element in an array that satisfies a provided testing function.

How to get the last of an array in JavaScript?

Use array.findLast(callback) to retrieve the last element matching a specific condition.

What arguments does findLast take in JavaScript?

The findLast() method takes a callback function that checks each element and an optional thisArg to set the this value in the callback.

How to use findLastIndex in JavaScript?

findLastIndex() returns the index of the last element that satisfies a given testing function, or -1 if none is found.

How to check if the last element of an array matches a condition?

Use array.findLast(callback) to see if the last matching element in the array meets a specific condition.