![]() ![]() Please refer to the Website Terms of Use for more information in this regard. Fragments are a lightweight and efficient way to group multiple elements without adding an additional parent element to the DOM tree. them is that the shorthand version does not support the key attribute. Any and all materials or information divulged during chats, email communications, online discussions, Support Center tickets, or made available to Developer Express Inc in any manner will be deemed NOT to be confidential by Developer Express Inc. Fragment with key Rendering a Fragment Best practices: Conclusion: Understanding React Fragment In React, a Fragment is a component that lets you group a list of children elements without creating an extra DOM node. <> is the shorthand tag for React.Fragment which allows us to group a. The most obvious and common prop that developers work with within React is the children prop. See docs here Yes, you can add a key in the below form Fragment which is not possible in the shorter version of Fragments (i.e, <></>) You can also use this way to auto assign key to your component list. In ReactJS, Key is the only attribute that can be passed with the Fragments, as it is needed for mapping a collection to an array of fragments.![]() Please refer to the Website Terms of Use for more information in this regard.Ĭonfindential Information: Developer Express Inc does not wish to receive, will not act to procure, nor will it solicit, confidential or proprietary materials and information from you through the DevExpress Support Center or its web properties. In particular, we will deep dive into one of the utility methods,, that React gives us, which helps to iterate over the children in a way which ensures performance and determinism. ![]() Developer Express Inc disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. This behavior results in useless additional markup and also makes the DOM tree heavy with additional layers of divs.Disclaimer: The information provided on and affiliated web properties (including the DevExpress Support Center) is provided "as is" without warranty of any kind. Letâs assign a keyto our list items inside numbers.map()and fix the missing key issue. Weâll discuss why itâs important in the next section. Keyed Fragments Fragments declared with the explicit syntax may have keys. Using the key prop with React fragments Using shortcut version Fragment in Action What is React Fragment React Fragment is a feature in React that allows you to return multiple elements from a React component by allowing you to group a list of children without adding extra nodes to the DOM. A React Fragment is a useful tool when it comes to building React applications as fragments make it simple and easy to group components and elements together without polluting the DOM by adding in parent elements just for grouping purposes. The traditional approach has been to wrap them in a div element because a React component can return only one element. </> Reference Usage Returning multiple elements Assigning multiple elements to a variable Grouping elements with text Rendering a list of Fragments Reference Wrap elements in to group them together in situations where you need a single element. A key is a special string attribute you need to include when creating lists of elements.![]()
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