December 13, 2025 - The filter() method of Array instances creates a shallow copy of a portion of a given array, filtered down to just the elements from the given array that pass the test implemented by the provided function.

July 25, 2024 - The filter() method filters an array according to provided criteria, returning a new array containing the filtered items. The Array object’s filter() method is an iteration method which enables us to retrieve all of an array’s elements that ...

September 4, 2019 - Since all three are called on arrays and since .map() and .filter() both return arrays, we can easily chain our calls.

The filter() method creates a new array filled with elements that pass a test provided by a function.

import 'core-js/actual'; Promise.try(() => 42).then(it => console.log(it)); // => 42 Array.from(new Set([1, 2, 3]).union(new Set([3, 4, 5]))); // => [1, 2, 3, 4, 5] [1, 2].flatMap(it => [it, it]); // => [1, 1, 2, 2] Iterator.concat([1, 2], function * (i) { while (true) yield i++; }(3)) .drop(1).take(5) .filter(it => it % 2) .map(it => it ** 2) .toArray(); // => [9, 25] structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])

November 8, 2023 - The filter() function is a powerful array method in JavaScript that allows one to create a new array containing elements that satisfy a specific condition.

Returns a new array with only the elements that passed the test. ... const prices = [1800, 2000, null, 3000, 5000, "Thousand", 500, 8000] function checkPrice(element) { return element > 2000 && !Number.isNaN(element); } let filteredPrices = prices.filter(checkPrice); console.log(filteredPrices); ...

October 17, 2022 - The filter method in Javascript creates a shallow copy of an array, filtering it based on a number of conditions. It accepts a callback function. The array which filter produces will usually be a reduced version of the original array.

November 12, 2021 - We're using a function built into arrays in JavaScript, called Array.prototype.filter, which creates a new array containing all elements that pass the check within the function it takes as an argument.

July 29, 2025 - JavaScript’s array.filter() method creates a new array containing only the elements from the original array that pass a test implemented by a provided function.

Array filtering in JavaScript allows you to create a new array from an existing one, containing only elements that match a given condition.

December 22, 2025 - Learn how to efficiently filter arrays in JavaScript using the filter() method. Explore real-world examples and combine filter() with other array methods for advanced data handling.

April 14, 2020 - filter() creates a new array with filtered elements that lie under specific conditions.

November 28, 2024 - This method provides an efficient way to sift through arrays and select only those elements which meet the criteria you define, all without altering the original array. In this article, you will learn how to utilize the filter() function to ...

This method takes an array of items, passes them through a “test” (a function that returns true or false), and returns a new array of only those items that passed the test (returned true).

This allows you to create more complex filters that depend on the element's relationship with other elements, or the array as a whole.

March 11, 2022 - A function or search criteria that would be used to filter values in the array · value - Required, the current element that needs to be filtered · index - Optional, in case you would like to start the iteration from a specific index ...

July 23, 2025 - One can use the filter() and reduce() functions in JavaScript to filter the object array based on attributes.

Array Filter expects us to return an expression that will evaluate true or false, we can go straight to the finish line and make it easier by supplying literally true and false array values. I’m using JavaScript’s Boolean object to coerce the array element to a Boolean.