![]() The way to handle it being a valid JSX element and access its props is by pretending that it is a normal component. ![]() Although it doesn't behave like the other types of components (FunctionComponent is the main one now as StatelessComponent has been deprecated with the introduction of hooks), there's no other way implemented to tell the JSX parser that this is a JSX element type. This is exactly the case for React.Fragment. This declaration allows for developing a special kind of component that would not act as a regular React component. But what about the ExoticComponent interface, what does it have to do with react fragments? The second part makes a lot of sense as the nodes added to the DOM are the children nodes of the fragment component we apply. It is declared using the ExoticComponent TypeScript interface and it specifies a prop `children` which is set to be a ReactNode. Bonus - A look into the internals of React Fragmentīy digging into the react codebase we can tell how the React.Fragment component works internally. The fragments can be applied directly to the return of a React component, inside functions that return JSX, in conditional rendering, and pretty much anywhere else a valid react component can be used.īesides avoiding adding an unnecessary element to the DOM, fragments are also the solution to not break the rules of the HTML syntax, as in the `` element example where its parent node must be either ``, `` or ``. If there's no key or attributes set, the short syntax can be applied and both approaches deliver the same result. An example would be when mapping items from an array to JSX. React fragments full#Not only do they clear up a lot of component code, but the fact that they have no output into the DOM should lead to fewer superfluous div and span elements that a lot of React applications are littered with.The most common case where the full syntax is required is when dealing with cases where a key is required by React so that, internally, it can uniquely identify a given node. I can already see many more places through our app which could be made more straightforward and easier to work with as a result of Fragments and I'm excited to continue using them. You could have used a literal mdash here but we prefer to use the - version and hence Fragments provided a nice solution for us. This is now easier to follow and allows me to use HTML entities and have them work as expected. The difference is that a Fragment component doesn't end up adding any extra markup into the DOM: Using a Fragmentįirst, we import Fragment just like we import Component from react: import React, The Fragment element is imported from the react module, and can be used just like any other JSX element. They let you group a list of children without adding extra nodes to the DOM: Fragments in React 16.2įragments look like empty JSX tags. On a large application with a suite of components this can very quickly lead to a set of wrapping elements that can produce a big set of HTML soup.
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