Create GraphQL Queries
To write our GraphQL questions or queries use the gql tag from the graphql package. It is like writing a clear request for the data you need. Here’s an example, Let’s create a simple query to fetch a list of users
// src/queries.js
import { gql } from '@apollo/client';
export const GET_USERS = gql`
query {
users {
id
name
// Add other fields you need
}
}
`;
The explanation of the above code:
The gql function is imported from the @apollo/client package. The gql function is used to define gql queries, mutations, and fragments to integrate in a javascript code. While using the Apollo Client this function is used to parse the GraphQL query strings and make a query document that can be understood by the Apollo Client so this sort of brings in a tool that helps the Apollo Client understand your GraphQL questions.
Defining a GraphQL query: You write your query using the gql tag like filling out a form. GET_USERS is created as a constant with the gql tag . This query requests the data from the GraphQL API with the required fields, here it’s querying for users. With fields such as ID, name, and email, you can specify any other fields you require.
Query Structure:
- query: This word tells Apollo you are asking for information
- users: The specific data you are looking for
- fields: These are the details about the user you want such as id, name, email, etc.
Additional info: You should keep your queries separate in file queries.js to make your files cleaner and easier to use.
How to Integrate GraphQL APIs Into Your React.js Projects
Imagine a React.js world where you can specify exactly the data you need and it flows effortlessly tailored to your needs, and react can efficiently update the DOM as and when needed. No more under-fetching or over-fetching of data or wrestling with nested JSON structures.
This dream becomes a reality with the use of GraphQL the rising star of API technology. This article aims to help you integrate the GraphQL API with your React project.
Table of Content
- What is GraphQL
- Why GraphQL
- How to Integrate GraphQL APIs into Your React.js Projects
- Step 1: Set Up a React Application
- Step 2: Install Required Packages
- Step 3: Using Apollo, Configure the Apollo Client
- Step 4: Create GraphQL Queries
- Step 5: Fetch Data in React Components
- Step 6: Display Data in Your React App
- Step 7: Run Your Application