MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Array › filter
Array.prototype.filter() - JavaScript | MDN
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.
W3Schools
w3schools.com › jsref › jsref_filter.asp
JavaScript Array filter() Method
The filter() method creates a new array filled with elements that pass a test provided by a function.
Filter array in objects array
Hello everyone, I have the following construct: const allProducts = [ { img:" xyz", desc: "xyz", categories:["Men", "Sportshoes"]; } ] I want to get all products, where categories includes Men. I tried: allProducts.filter((item)=>item.categories.includes("Men")) also: allProducts.filter((i... More on forum.freecodecamp.org
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January 3, 2023Is there a way to filter this array twice without creating an extra variable?
Yes. Use &&. const filtered = myArray.filter((value, index, array) => { return value % 2 === 0 && array.indexOf(value) === index; }); More on reddit.com
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February 7, 2017What's the best/fastest way to filter a long array containing 20k objects?
Build an index or trie. Or try a js search engine. More on reddit.com
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August 7, 2017[AskJS] Lazy alternative for Array.filter() and co?
I imagine people who are against lodash are just against lazy alternatives in general. Dev time is more valuable to me than squeezing out a couple cycles more of performance. If you’re in the same mindset as well, just use lodash. Also, lodash is actually really performant. The people who work on it knew what they were doing. Odds are that those extra cycles are going to be non-trivial to squeeze out and difficult to read anyway. Seriously just use lodash. Edit: punctuation and disclaimer More on reddit.com
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March 21, 2019Videos
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JavaScript Array Filter Method - Basic Example & Real Project Example ...
JavaScript filter() method in 6 minutes!
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How to Use filter() in JavaScript | Filter Arrays Like a Pro - YouTube
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JS Array Methods Explained #6 - FILTER Method - YouTube
06:57
Mastering the Javascript Array.filter Method: A Comprehensive Guide ...
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Filter an Array of Objects with JavaScript - YouTube
GitHub
github.com › zloirock › core-js
GitHub - zloirock/core-js: Standard Library
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])
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Favtutor
favtutor.com › articles › javascript-array-filter
JavaScript Array Filter() Method (with Examples)
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.
Mike Bifulco
mikebifulco.com › home › javascript tips: using array.filter(boolean)
JavaScript Tips: Using Array.filter(Boolean) | Mike Bifulco
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.
Anton Dev Tips
antondevtips.com › blog › how-to-filter-arrays-in-javascript-a-comprehensive-guide
How to Filter Arrays in JavaScript: A Comprehensive Guide
Array filtering in JavaScript allows you to create a new array from an existing one, containing only elements that match a given condition.
Flexiple
flexiple.com › javascript › javascript-filter-array
How to use the JavaScript filter array method? - Flexiple Tutorials - Flexiple
March 11, 2022 - After filtering it returns an array with the values that pass the filter. The JavaScript filter function iterates over the existing values in an array and returns the values that pass.
Adripofjavascript
adripofjavascript.com › blog › drips › filtering-arrays-with-array-filter.html
Filtering Arrays with Array#filter - A Drip of JavaScript
The filter method accepts a callback function. In that callback function we examine each element of the array indidually, and return true if we want the element to pass the filter.
Vultr Docs
docs.vultr.com › javascript › standard-library › Array › filter
JavaScript Array filter() - Filter Array Elements | Vultr Docs
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 selectively process and manipulate array data.
React
react.dev › learn › rendering-lists
Rendering Lists – React
You can use JavaScript’s filter() method to return just those people. 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).
Programiz
programiz.com › javascript › library › array › filter
Javascript Array filter()
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); // [ 3000, 5000, 8000 ] // using arrow function
GeeksforGeeks
geeksforgeeks.org › javascript › how-to-filter-object-array-based-on-attributes
How to Filter Object Array based on Attributes? - GeeksforGeeks
July 23, 2025 - One can use the filter() and reduce() functions in JavaScript to filter the object array based on attributes.
Ultimate Courses
ultimatecourses.com › blog › array-filter-javascript
Exploring Array Filter in JavaScript - Ultimate Courses
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.
Tabnine
tabnine.com › home › how to use the array filter() method in javascript
How to Use the Array filter() method in JavaScript - Tabnine
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 ...
Server Side Up
serversideup.net › blog › filter-sort-and-search-arrays-with-javascript
Filter, Sort, and Search Arrays with JavaScript | Server Side Up
October 4, 2022 - The first parameter is the value of the array as we iterate over it. The arrow is a callback function that returns true or false if the filter is matched. So if number % 2 == 0 then it's even and we return true. In most scenarios, you'd probably want to update a table, or make some UI changes. In straight JavaScript, you'd take the response from this method and use it to display the data instead of the full numbers array.
Educative
educative.io › answers › what-is-the-javascript-array-filter
What is the JavaScript Array filter()?
It takes as an argument an array and a function and applies the function to each element in the array. Once done, it returns an array containing all the elements that pass the condition set by the argument function. Here is the function signature for the filter() function in Javascript:
TutorialsPoint
tutorialspoint.com › filter-array-with-filter-and-includes-in-javascript
Filter array with filter() and includes() in JavaScript
January 28, 2025 - filter(): It is used to create a new array that includes only the elements that satisfy the condition provided by the callback function. includes(): Using includes(), the callback function checks if the element from array1 is present in array2. In JavaScript, a callback function is a function ...
GeeksforGeeks
geeksforgeeks.org › javascript › how-to-filter-an-array-of-objects-based-on-multiple-properties-in-javascript
How to Filter an Array of Objects Based on Multiple Properties in JavaScript ? - GeeksforGeeks
August 5, 2025 - The filter() method is a built-in array method in JavaScript that creates a new array with elements that pass the provided function's test.
BitDegree
bitdegree.org › learn › javascript-filter
JavaScript Filter: Guide on Filtering Arrays and Creating New Ones
February 25, 2020 - TL;DR – JavaScript filter() function is for defining a new array with elements from the initial array that match a specified condition/function.