AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
React fragment map key8/15/2023 Then you employed React fragments to get over the problem and with an easy-to-use Syntax you were able to return multiple elements for a React Component. Then you were introduced to a problem of trying to return multiple HTML elements from a regular React Component which got stuck due to an error. In this guide, you learned what React fragments are. You can also see the app running with react fragments on Netlify. The code change demonstrated in this blog post is available as a pull request for your reference. Also if you have a style sheet targeting elements by their depth, they will work without any change as the HTML will not have any extra layer of div or other HTML elements. In addition to that if you are creating a subcomponent structure like an HTML table you can get the exact HTML you are after. It has multiple advantages, for instance, the depth of the HTML node tree will be lesser. To better understand the HTML structure, below is the comparison between before using React fragments with a div wrapper and after using React fragments is shown below: You will need to use the full syntax if you want to make use of Keyed fragments, where every fragment has a unique key. You have easily solved the problem and it is possible to return more than one HTML element from a React component now.Īs seen above you can use the full React fragment syntax or the short syntax with just and. The above React component now returns 2 or 3 HTML elements, one H2, one of the two divs for loading or error, and the last div which will render the stories with the CSS class stories-wrapper. If you look at the HackerNewsStories component the code looks as follows: import from 'react' You can find the app running on Netlify and the code is available on GitHub for your reference. The app is built on React 18.2 and below is the screenshot of the app in action: It uses the unofficial HackerNews API provided by Algolia to get the Hackernews front-page stories. Example App - HackerNews #įor this guide, you will use an existing simple React application. On the other hand, fragments let you group a list of children without adding extra nodes (HTML Elements) to the DOM, which results in a shallow DOM tree. To comply with this requirement, React developers usually wrap the HTML with an extra div element. It is a common pattern in React for a component to return multiple elements, but with the usual React component syntax and return, it always expects only a single HTML element to be returned. React fragments is a feature included in React to return more than one HTML element from a React Component.
0 Comments
Read More
Leave a Reply. |