#IMPORTING REACT FRAGMENT HOW TO#
#IMPORTING REACT FRAGMENT FULL#

#IMPORTING REACT FRAGMENT HOW TO#

Here’s an example of how to setup route-based code splitting into your app using libraries like React Router with React.lazy. You also tend to be re-rendering the entire page at once so your users are unlikely to be interacting with other elements on the page at the same time. Most people on the web are used to page transitions taking some amount of time to load. You want to make sure you choose places that will split bundles evenly, but won’t disrupt the user experience.Ī good place to start is with routes.

Avatar Colocated Fragment for importing its fields.Function add ( a, b ) > ) Route-based code splittingĭeciding where in your app to introduce code splitting can be a bit tricky.

At the same time, we are creating a PostHeader Colocated Fragment, which is composed of some individual fields and the author field.

First, we import the Avatar component, which is used by PostHeader for rendering the author's information, but when we import Avatar we are also importing it Colocated Fragments through the fragment attribute!.

Let's use a PostHeader component as an example, which will use the Avatar component for rendering the author information: You can only realize Colocated Fragments magic when you start consuming them. (If you use typescript, There's a 'step by step' section on how to generate your prop types automatically based on the Colocated Fragment definition).

Finally, this component consumes the data through a user prop, which includes the same fields as the Fragment: id, image and name.

(If you use typescript, you can create a new component type to force the inclusion of the fragments attribute).

Apollo proposes to export Colocated Fragments using this attribute, however, this is a matter of preference, just make sure that you set a convention.

We export the Colocated Fragment by creating a new fragments attribute in the AvatarComponent.

There are no explicit rules on how to name Fragments, but to avoid name collisions, A good alternative is to name them the same as the component they are attached to.

First we defined a new Fragment called Avatar.

There are three important things happening here: This is how it would look like with a Colocated Fragment: This component will render a user's information. Let's use an Avatar component as an example. All it fields will be included in the section/field where this is being called.įragments are useful, but when you combine them with React components, they become powerful.Ī colocated fragment is just like any other fragment, except it is attached to a particular component that uses the fragment's fields.īasically, is 'colocate' the Fragment definition next to the component that is gonna consume its information. The way to consume Fragments is through the spread operator followed by the Fragment name. All the fields from the Fragment will be included in the section/field where is being called.Īs you can see, we are naming our Fragment Avatar and we are indicating that it can only be used by User types. Let's suppose we have a GraphQL post query, which returns a post's content, it author's information, and each of the post's comments:Įnter fullscreen mode Exit fullscreen modeĪs you can see, we are naming our Fragment Avatar and we are indicating that it can only be used by User types. In this article, we are going to focus on learning a variation based on the second method, where we colocate our queries next to the parent components that execute them, and with Fragments, we colocate the consumed fields next to the child components consuming them.Ī Fragment can be defined as a reusable unit of information.įragments let you construct sets of fields, and then include them in queries where you need to. const name, setName useState ('') Then, I'll create an useEffect hook to use your getuserdata function to populate. The default value of this state will be an empty string.

From your code in the getuserdata function, let's assume the data we're talking about is the user name.

#IMPORTING REACT FRAGMENT FULL#

Colocating your full query definition next to the component consuming it. First, you'll need a state to hold your userData.Saving all your queries in a single file.

There are multiple ways for organizing your queries, but normally, you'll find a variation of these two methods: Developers working on a React project, that consumes data from a GraphQL API and wants to find a new way to organize their queries definitions.

Importing react fragment