You can read more about this in detail on React.Fragment vs. The only attribute you are likely to ever use with a Fragment is a key like we have talked about above, so as long as the key is not needed then it will be quicker and easier to make use of the shorthand. The shorthand version was introduced in React v16.2.0. The core difference between the longhand and shorthand React Fragment is that the shorthand does not support attributes whereas the longhand does. React fragment longhand vs React Fragment shorthand Avoiding layout issues: When using certain layout components or libraries, such as CSS Grid or Flexbox, adding an additional parent element can sometimes. map ( ( ) Īs you can see in the above example we are using the “fruit” as the key because it is always unique within that array, and where we are creating a new component from for each “fruit” with multiple elements we need to wrap in in a fragment to have a single parent element.Īnd because we need to include a key we are therefore having to use the longhand version of a React Fragment. More Query from same tag default export eslint issues ref not referencing correct item in array Why is it not filling the useState whin i get the data. Here is an example of the longhand version of a React Fragment: However, we will go over this a little here later on in this post as well.įor now let’s take a look at how you can use both the longhand and shorthand versions of React Fragment. For more information on the differences between the two I highly recommend having a read through What are the differences between React.Fragment vs. We have the longhand version and the shorthand version. Thankfully using a React Fragment is nice and easy to do and we are provided with two different options from React. It probably won’t have a large effect if it is only done in one or two places but if used over a large application it can really save on the overall size of the DOM tree. You can also import the Fragment element from react. Due to the fact that React components can only return one element at a time, the wrapper div is frequently 'irrelevant' and is only used in this circumstance. This is why React Fragments are needed, but there is another use case where the HTML would be valid with or without an additional parent element and in these cases by using a React Fragment it helps to keep the overall size of the HTML DOM tree down which helps with performance. If you use the shorthand syntax for fragments <> </>, you wont be able to pass any props to the fragment. Introduction When we were required to return several elements, they had to be contained within a single div prior to the release of React version 16.2.
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