GraphQL fragment along with 8 other things

Use a schema to define your data types and the relationships between them.

This will make it easier to write and validate your queries and mutations. For example:

type User {
  id: ID!
  name: String!
  email: String!
  posts: [Post]
}

type Post {
  id: ID!
  title: String!
  body: String!
  author: User!
}

Use the GraphQL type system to enforce data integrity and prevent mistakes.

For example, you can use the “non-null” type modifier to ensure that a field always has a value:

type User {
  id: ID!
  name: String!
  email: String!
  posts: [Post]!
}

Use the “introspection” query to learn about the schema of a GraphQL API.

This can be useful for exploring an API that you are not familiar with, or for generating documentation automatically:

query IntrospectionQuery {
  __schema {
    queryType {
      name
    }
    mutationType {
      name
    }
    subscriptionType {
      name
    }
    types {
      name
      kind
      fields {
        name
        type {
          name
          kind
          ofType {
            name
            kind
          }
        }
      }
    }
  }
}

Use variables in your queries and mutations to avoid hard-coding values.

This will make your code more reusable and easier to maintain:

query GetUser($userId: ID!) {
  user(id: $userId) {
    id
    name
    email
  }
}

Use fragments to avoid repeating the same fields in multiple queries or mutations.

This will make your code more DRY (Don’t Repeat Yourself) and easier to read:

fragment UserFields on User {
  id
  name
  email
}

query GetUsers {
  users {
    ...UserFields
  }
}

mutation UpdateUser($userId: ID!, $name: String!) {
  updateUser(id: $userId, name: $name) {
    ...UserFields
  }
}

Use the “debug” mode in the GraphQL Playground to see the underlying query that is being sent to the server.

This can be helpful for troubleshooting and understanding how the query is being executed.

Use the “mock” mode in the GraphQL Playground to test your queries and mutations without needing to set up a server.

This can be useful for quickly testing out ideas without having to worry about setting up a backend.

Use subscriptions to get real-time updates from the server.

This can be useful for building real-time applications, such as chat or collaboration tools:

subscription NewPosts {
  newPost {
    id
    title
    body
    author {
      id
      name
    }
  }
}

Use the tools and libraries provided by the GraphQL community to make working with GraphQL easier.

These can include libraries for building servers, clients, and tools for visualizing and debugging GraphQL APIs.