AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |
Back to Blog
React fragment in array1/6/2024 Use arrays and provide keys for content that is rendered by iterating dynamic data. So use fragments for static content that will not change, and enjoy the freedom of not having to specify keys. React.Fragment is a feature in React that allows developers to group multiple elements together without adding an extra element to. Rendering Adjacent Elements with agment Wrapping the elements in div will make the application full of divs which is usually called as 'div soup'. Same if you would use fragments for such dynamic content, however in that case you'd not even get any warnings. As you can see, the first result worked as expected when the button is clicked several times, but in strict mode, it keeps returning the same output. Array createFragment(object children).If you use an array without keys and ignore the warnings, then your perf will suffer and you'll have bugs when e.g users sort/drag elements. Below are two different results when running the code (without changing my code) in the strict and fragment method. Arrays are meant to represent dynamic children, that is: content elements that are based on dynamic data.įragments are meant to represent static content, that is: content that does not change dynamically, or: content that is basically hard coded. The point is, arrays and fragments are not just the same thing, they have different concepts. If your array children are static and stable anyways, then you can safely ignore the warnings. The Object.entries() method returns an array of a given objectâs own enumerable string-keyed property key, value pairs, in the same order as that provided by a. but it leaves the door open to issues of scale or React changing how they deal with nested arrays/Fragments. Fragment syntax in JSX was inspired by prior art such as the XMLList() <></> constructor in E4X.I don't think react will optimize anything in this case, it's just that you must pass key props on array children by design, or you'll suffer at least warnings. The new React.Fragment feature lets us do this in an easy.
0 Comments
Read More
Leave a Reply. |