How to get first N number of elements from an array using ReactJS? Last Updated : 02 Nov, 2023 Comments Improve Suggest changes Like Article Like Report To get the first N number of elements from an array using React JS simply means to display the N number of elements of the array. PrerequisitesReact JSReact Class ComponentApproach to get first N number of elements:We will create an array containing some values using the react class component and from the user input, we will display n number of elements on the page. We can use array.slice method to get the first N numbers from the array. Syntax: array.slice(0, n);Note: The slice function on arrays returns a shallow copy of the array, and does not modify the original array. And if N is larger than the size of the array then it won't through any error and returns the whole array itself. Stpes to create React ApplicationStep 1: Create a React application using the following command: npx create-react-app foldernameStep 2: After creating your project folder i.e. foldername, move to it using the following command: cd foldernameProject Structure:Project StructureExample: Change the number of elements form an array containing 7 values on the user input. JavaScript // Filename - App.js import { React, Component } from "react"; class App extends Component { constructor(props) { super(props); this.state = { n: 4 }; } render() { // Numbers list const list = [1, 2, 3, 4, 5, 6, 7]; // Slice function call let items = list.slice(0, this.state.n).map((i) => { return ( <button style={{ margin: "10px", backgroundColor: "blue", color: "white", padding: "10px", border: "blue 2px", borderRadius: "2px", }} type="button" > {i} </button> ); }); return ( <div style={{ textAlign: "center", margin: "auto", }} > <h1 style={{ color: "green" }}> GeeksforGeeks </h1> <h3> React Example for first N numbers form an Array containg 1 to 7 </h3> <input min={1} max={7} value={this.state.n} onChange={(e) => this.setState({ n: e.target.value }) } placeholder="Enter a number from 1 to 7" ></input> <div>{items}</div> </div> ); } } export default App; Step to Run Application: Run the application using the following command from the root directory of the project: npm startOutput:Â This output will be visible on http://localhost:3000/ on the browser window. Comment More infoAdvertise with us Next Article How to get first N number of elements from an array using ReactJS? S sachinchhipa44 Follow Improve Article Tags : JavaScript Web Technologies ReactJS React-Questions Similar Reads JavaScript - How to Get First N Elements from an Array? There are different ways to get the first N elements from array in JavaScript.Examples:Input:arr = [1, 2, 3, 4, 5, 6], n = 3 Output: [1, 2, 3] Input:arr = [6, 1, 4, 9, 3, 5, 7], n = 4Output: [6, 1, 4, 9]1. Using slice() MethodThe slice() method is used to extract a part of an array and returns a new 4 min read How to find the Total Number of Elements in an Array in TypeScript ? In TypeScript, arrays are a common data structure used to store collections of elements. You can store multiple elements of different or the same data type inside them by explicitly typing. The below methods can be used to accomplish this task: Table of Content Using the length property Using the fo 3 min read How to build an HTML table using ReactJS from arrays ? To build an HTML table using ReactJS from arrays we can use the array methods to iterate to iterate the elements and create the table rows Prerequisites:NPM & Node.jsReact JSJavaScript Array.map()HTML TableApproach: To build an HTML table from an array of elements using ReactJS, we can use the a 2 min read How to get an Element by ID in ReactJS ? ReactJS, a popular JavaScript library for user interfaces, empowers developers with tools, such as the ref system, to manipulate the DOM by accessing elements using their unique IDs. This article explores the process of obtaining elements by ID in ReactJS for effective component interaction and mani 4 min read How To Delete An Item From State Array in ReactJS? It is important to manage the state in ReactJS for building interactive user interfaces. Sometimes when we work with arrays, we need to remove an item from these arrays. A common use case is deleting an item from an array stored in the componentâs state. In this article, weâll explore different ways 3 min read How to Fetch Data From an API in ReactJS? ReactJS provides several ways to interact with APIs, allowing you to retrieve data from the server and display it in your application. In this article, weâll walk you through different methods to fetch data from an API in ReactJS, including using the built-in fetch method, axios, and managing the st 8 min read How to list all the files from firebase storage using ReactJS ? To list all the files from Firebase storage using React JS we will access the Firebase storage using the SDK and display the data on the webpage from the storage.Prerequisites:NPM & Node.jsReact JSFirebaseApproach: To list all the files from Firebase storage using ReactJS we will first configure 3 min read How to Map Data into Components using ReactJS? Mapping data in react js component is a comman practice to render the lists and repeating elements. In this article, we will have a users data and we will map it to react components to display the users information in the react appPrerequisites:React JSNodejs and npmJavaScript Array mapApproachTo ma 3 min read How To Render An Array Of Objects In ReactJS? Rendering dynamic data in ReactJS is one of the most fundamental tasks when building interactive web applications. One of the most common scenarios is rendering an array of objects, such as a list of users, products, or posts, in the user interface (UI). To render an array of objects in React we wil 4 min read How to create new elements with React JS mapping props ? We'll learn how to create new elements in React JS using the map() function and props. It's suitable for both beginners and those looking to improve their React skills. The tutorial offers a step-by-step walkthrough, helping you create adaptable and reusable components by effectively using props and 2 min read Like