The user of this website and/or Platform (User) should not construe any such information as legal, investment, tax, financial or any other advice. It will help you understand react.js concepts and build a career in this field.įor the next steps, check out our new blog posts about Building forms in react with formik with examples.ĭisclaimer: The content on the website and/or Platform is for informational and educational purposes only. If you want to learn React.js, I recommend React JS online course KnowledgeHut. If one needs a wrapper for JSX styling, use a div instead. So, in Conclusion, React Fragments help wrap multiple elements/components together as it is better optimized, but they should only be used when needed. We can avoid issues that break layouts or potentially optimize our markup rendering time using fragments. Although they are not a replacement for divs, they offer a better approach to structuring and rendering overall DOM markup instead of unnecessary divs. React Fragments allows users to write cleaner, readable and maintainable code. Flex, CSS Grids, and a few other CSS mechanisms have a special parent-child relationship, and adding divs in the middle makes it hard to keep the specified layout while extracting logical components.Increased code readability, As the Fragment component supports a syntactic sugar form, it makes code more readable as structured.Less overall DOM markup (increased render performance and less memory overhead).This may not significantly impact a small application but benefits very large applications with very deep or large trees. React Fragments is faster and more space-efficient as compared to an extra div (no need to create an extra DOM node).React Fragments is an essential tool while working on a real-life project which consists of multiple layers of nested children, and here are some reasons why: import React from 'react'Įxport default App Should I Use React Fragments? React fragments can be used when elements are to be rendered conditionally. Notice we cannot use React Fragment short syntax while rendering lists because it does not support keys and attributes, so instead of that, we have to use it as Ĥ. We can use React fragments to render lists to avoid the creation of extra div because fragments can also have keys that help React identify the updated or deleted elements. If a parent div was used inside the render() of, then the resulting HTML will be invalid.ģ. would need to return multiple elements in order for the rendered HTML to be valid. “ Fragments are syntax that allows us to add multiple elements to a React component without wrapping them in an extra DOM node.” The SyntaxĪ typical pattern to return multiple elements is to wrap those elements in a div. This is where the Fragments API comes in. This behavior leads to several problems, including useless markup and sometimes even invalid HTML to be rendered, which is often troublesome. In most cases, the wrapper div is “irrelevant” and is only used because React components can return only one element at a time. What is a React Fragment?īefore React version 16.2 was released, whenever we needed to return multiple elements, they had to be wrapped in a single div. You can better understand the concept of react js fragments and implementation through a more detailed guide like any React js online course. So learning React will be a good career option. There is a high demand for React developers in the market. Notably, React has become popular recently-in many companies, including Facebook, Netflix, Airbnb, and Instagram. In this article, we will learn about react fragments and how you can use them. This does not significantly affect a small React application, but working on a real-life project with multiple layers of nested children can largely affect the application's response time. React didn't have any abilities to circumvent this, so that means any component of yours with multiple children would always require a wrapper, and due to this, an additional node is required in DOM. Before React v16, whenever there was a need to return a group of components/elements, we needed to wrap our elements in an enclosing. When working with React, there are cases where you will need to render multiple elements or return a group of related items.React is a powerful library that uses the components formed earlier and reuses those components when required.
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