--- title: Learn Computing from the Experts | The Rheinwerk Computing Blog | JavaScript description: JavaScript | Dive into programming, web development, and more with Rheinwerk Computing Blog! Your go-to resource for expanding your computing knowledge. --- [![Rheinwerk Computing Logo](https://blog.rheinwerk-computing.com/hubfs/computing_logo-header.svg)](https://blog.rheinwerk-computing.com/) [Blog](https://blog.rheinwerk-computing.com) - Books - Get an overview of our wide selection of books on every relevant computing topic. - [General Computing](https://www.sap-press.com/rheinwerk-computing/general-computing/) - [DevOps](https://www.sap-press.com/rheinwerk-computing/devops/) - [Programming Languages](https://www.sap-press.com/rheinwerk-computing/programming-languages/) - [Security](https://www.sap-press.com/rheinwerk-computing/security/) - [Software Development](https://www.sap-press.com/rheinwerk-computing/software-development/) - Book Subscription - Get unlimited access to all Rheinwerk Computing books! - [Programming Subscription](https://sap-press.com/subscriptions/) # JavaScript [![Server Communication in React: Axios vs Fetch API](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Server%20Communication%20in%20React_%20Axios%20vs%20Fetch%20API.jpg?height=600&name=Server%20Communication%20in%20React_%20Axios%20vs%20Fetch%20API.jpg)](https://blog.rheinwerk-computing.com/server-communication-in-react-axios-vs-fetch-api) ## [Server Communication in React: Axios vs Fetch API](https://blog.rheinwerk-computing.com/server-communication-in-react-axios-vs-fetch-api) Communicating with a web server is a classic side effect in a React application. For this reason, you place these requests not directly in the... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/server-communication-in-react-axios-vs-fetch-api) [![How to Find and Avoid Errors in JavaScript Programs](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Find%20and%20Avoid%20Errors%20in%20JavaScript%20Programs.jpg?height=600&name=How%20to%20Find%20and%20Avoid%20Errors%20in%20JavaScript%20Programs.jpg)](https://blog.rheinwerk-computing.com/how-to-find-and-avoid-errors-in-javascript-programs) ## [How to Find and Avoid Errors in JavaScript Programs](https://blog.rheinwerk-computing.com/how-to-find-and-avoid-errors-in-javascript-programs) During the development of any program (including JavaScript programs), you’ll make the odd mistake. This is normal and part of everyday life when you... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-find-and-avoid-errors-in-javascript-programs) [![How to Set Up Single-Page Web Applications with React](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Set%20Up%20Single-Page%20Web%20Applications%20with%20React.png?height=600&name=How%20to%20Set%20Up%20Single-Page%20Web%20Applications%20with%20React.png)](https://blog.rheinwerk-computing.com/how-to-set-up-single-page-web-applications-with-react) ## [How to Set Up Single-Page Web Applications with React](https://blog.rheinwerk-computing.com/how-to-set-up-single-page-web-applications-with-react) A React application usually consists of a large number of small files that have interdependencies that you can resolve via the JavaScript module... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-set-up-single-page-web-applications-with-react) [![Testing Your React Components with Jest: A Quick Guide](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Testing%20Your%20React%20Components%20with%20Jest_%20A%20Quick%20Guide.jpg?height=600&name=Testing%20Your%20React%20Components%20with%20Jest_%20A%20Quick%20Guide.jpg)](https://blog.rheinwerk-computing.com/testing-your-react-components-with-jest-a-quick-guide) ## [Testing Your React Components with Jest: A Quick Guide](https://blog.rheinwerk-computing.com/testing-your-react-components-with-jest-a-quick-guide) When testing a component, you basically proceed in the same way as for an ordinary unit test: you prepare the environment, you perform an operation,... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/testing-your-react-components-with-jest-a-quick-guide) [![What Are the Most Popular Programming Languages and Which Should You Learn?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Are%20the%20Most%20Popular%20Programming%20Languages%20and%20Which%20Should%20You%20Learn_.jpg?height=600&name=What%20Are%20the%20Most%20Popular%20Programming%20Languages%20and%20Which%20Should%20You%20Learn_.jpg)](https://blog.rheinwerk-computing.com/what-are-the-most-popular-programming-languages-and-which-should-you-learn) ## [What Are the Most Popular Programming Languages and Which Should You Learn?](https://blog.rheinwerk-computing.com/what-are-the-most-popular-programming-languages-and-which-should-you-learn) In addition to the basic differences between the individual programming languages, beginners may wonder what a programming language is at all, what... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/what-are-the-most-popular-programming-languages-and-which-should-you-learn) [![How to Authenticate the Nest CLI](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Authenticate%20the%20Nest%20CLI.jpg?height=600&name=How%20to%20Authenticate%20the%20Nest%20CLI.jpg)](https://blog.rheinwerk-computing.com/how-to-authenticate-the-nest-cli) ## [How to Authenticate the Nest CLI](https://blog.rheinwerk-computing.com/how-to-authenticate-the-nest-cli) For authentication, Nest uses an established library—Passport—and integrates it into the framework via an abstraction layer. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-authenticate-the-nest-cli) [![What Are the Building Blocks of a React Application?](https://blog.rheinwerk-computing.com/hs-fs/hubfs/What%20Are%20the%20Building%20Blocks%20of%20a%20React%20Application_.jpg?height=600&name=What%20Are%20the%20Building%20Blocks%20of%20a%20React%20Application_.jpg)](https://blog.rheinwerk-computing.com/what-are-the-building-blocks-of-a-react-application) ## [What Are the Building Blocks of a React Application?](https://blog.rheinwerk-computing.com/what-are-the-building-blocks-of-a-react-application) Discover how React’s functional components, powered by the Hook API, revolutionized Java development by simplifying state management and lifecycle... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/what-are-the-building-blocks-of-a-react-application) [![How to Create a Custom Component Library in React](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Create%20a%20Custom%20Component%20Library%20in%20React.png?height=600&name=How%20to%20Create%20a%20Custom%20Component%20Library%20in%20React.png)](https://blog.rheinwerk-computing.com/how-to-create-a-custom-component-library-in-react) ## [How to Create a Custom Component Library in React](https://blog.rheinwerk-computing.com/how-to-create-a-custom-component-library-in-react) To create your own React component library, you need to perform several steps. ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-create-a-custom-component-library-in-react) [![How to Compile Node.js from Source: A Step-by-Step Guide for Ubuntu](https://blog.rheinwerk-computing.com/hs-fs/hubfs/How%20to%20Compile%20Node.js%20from%20Source%20A%20Step-by-Step%20Guide%20for%20Ubuntu.png?height=600&name=How%20to%20Compile%20Node.js%20from%20Source%20A%20Step-by-Step%20Guide%20for%20Ubuntu.png)](https://blog.rheinwerk-computing.com/how-to-compile-nodejs-from-source-a-step-by-step-guide-for-ubuntu) ## [How to Compile Node.js from Source: A Step-by-Step Guide for Ubuntu](https://blog.rheinwerk-computing.com/how-to-compile-nodejs-from-source-a-step-by-step-guide-for-ubuntu) In this blog post, you’ll learn how to operate Node.js not by using binary packages or by installing it using an installer for your system, but by... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/how-to-compile-nodejs-from-source-a-step-by-step-guide-for-ubuntu) [![Understanding React's useCallback and useMemo Hooks](https://blog.rheinwerk-computing.com/hs-fs/hubfs/Understanding%20Reacts%20useCallback%20and%20useMemo%20Hooks.jpg?height=600&name=Understanding%20Reacts%20useCallback%20and%20useMemo%20Hooks.jpg)](https://blog.rheinwerk-computing.com/understanding-reacts-usecallback-and-usememo-hooks) ## [Understanding React's useCallback and useMemo Hooks](https://blog.rheinwerk-computing.com/understanding-reacts-usecallback-and-usememo-hooks) The callback hook in React is intended to optimize the rendering process, and the memo hook is used to create a memoized version of any object... ![Rheinwerk Computing](https://blog.rheinwerk-computing.com/hubfs/RW-logo-300x300.png) by [Rheinwerk Computing](https://blog.rheinwerk-computing.com/author/rheinwerk-computing) [Read More](https://blog.rheinwerk-computing.com/understanding-reacts-usecallback-and-usememo-hooks) - [1](https://blog.rheinwerk-computing.com/tag/javascript/page/1) - [2](https://blog.rheinwerk-computing.com/tag/javascript/page/2) - [3](https://blog.rheinwerk-computing.com/tag/javascript/page/3) - [4](https://blog.rheinwerk-computing.com/tag/javascript/page/4) - ### Blog Topics - [All Topics](https://blog.rheinwerk-computing.com) - [Programming Languages](https://blog.rheinwerk-computing.com/tag/programming-languages) - [How To](https://blog.rheinwerk-computing.com/tag/how-to) - [DevOps](https://blog.rheinwerk-computing.com/tag/devops) - [JavaScript](https://blog.rheinwerk-computing.com/tag/javascript) - [Featured](https://blog.rheinwerk-computing.com/tag/featured) - [Cybersecurity](https://blog.rheinwerk-computing.com/tag/cybersecurity) - [What Is?](https://blog.rheinwerk-computing.com/tag/what-is) - [Artificial Intelligence](https://blog.rheinwerk-computing.com/tag/artificial-intelligence) - [Web Development](https://blog.rheinwerk-computing.com/tag/web-development) - [Software Development](https://blog.rheinwerk-computing.com/tag/software-development) **Subscribe to our blog!**Get notified about future blog updates. - - - ### Most Popular Blog Posts 1. 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