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graphql-request

graphql-request is a GraphQL client supporting Node and browsers for scripts or simple apps.

Now it also supports Deno 🦕

Features

  • Most simple & lightweight GraphQL client
  • Promise-based API (works with async / await)
  • TypeScript support
  • Isomorphic (works with Node / browsers)

Quickstart

Send a GraphQL query with a single line of code. ▶️ Try it out.

import { gql, request } from "https://deno.land/x/graphql_request/mod.ts";

const query = gql`
  {
    Movie(title: "Inception") {
      releaseDate
      actors {
        name
      }
    }
  }
`;

const data = await request("https://api.graph.cool/simple/v1/movies", query);

console.log(data);

Usage

import {
  GraphQLClient,
  request,
} from "https://deno.land/x/graphql_request/mod.ts";

// Run GraphQL queries/mutations using a static function
const data = await request(endpoint, query, variables);
console.log(data);

// ... or create a GraphQL client instance to send requests
const client = new GraphQLClient(endpoint, { headers: {} });
const data = client.request(query, variables);
console.log(data);

Community

GraphQL Code Generator's GraphQL-Request TypeScript Plugin

A GraphQL-Codegen plugin that generates a graphql-request ready-to-use SDK, which is fully-typed.

Examples

Authentication via HTTP header

import { gql, GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const graphQLClient = new GraphQLClient(endpoint, {
    headers: {
      authorization: "Bearer MY_TOKEN",
    },
  });

  const query = gql`
    {
      Movie(title: "Inception") {
        releaseDate
        actors {
          name
        }
      }
    }
  `;

  const data = await graphQLClient.request(query);
  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/authentication-via-http-header.ts

Incrementally setting headers

If you want to set headers after the GraphQLClient has been initialised, you can use the setHeader() or setHeaders() functions.

import { GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const client = new GraphQLClient(endpoint);

// Set a single header
client.setHeader("authorization", "Bearer MY_TOKEN");

// Override all existing headers
client.setHeaders({
  authorization: "Bearer MY_TOKEN",
  anotherheader: "header_value",
});

Set endpoint

If you want to change the endpoint after the GraphQLClient has been initialized, you can use the setEndpoint() function.

import { GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const client = new GraphQLClient(endpoint);

client.setEndpoint(newEndpoint);

passing-headers-in-each-request

It is possible to pass custom headers for each request. request() and rawRequest() accept a header object as the third parameter

import { GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const client = new GraphQLClient(endpoint);

const query = gql`
  query getMovie($title: String!) {
    Movie(title: $title) {
      releaseDate
      actors {
        name
      }
    }
  }
`;

const variables = {
  title: "Inception",
};

const requestHeaders = {
  authorization: "Bearer MY_TOKEN",
};

// Overrides the clients headers with the passed values
const data = await client.request(query, variables, requestHeaders);

Passing more options to fetch

import { gql, GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const graphQLClient = new GraphQLClient(endpoint, {
    credentials: "include",
    mode: "cors",
  });

  const query = gql`
    {
      Movie(title: "Inception") {
        releaseDate
        actors {
          name
        }
      }
    }
  `;

  const data = await graphQLClient.request(query);
  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/passing-more-options-to-fetch.ts

Using GraphQL Document variables

import { gql, request } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const query = gql`
    query getMovie($title: String!) {
      Movie(title: $title) {
        releaseDate
        actors {
          name
        }
      }
    }
  `;

  const variables = {
    title: "Inception",
  };

  const data = await request(endpoint, query, variables);
  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

GraphQL Mutations

import { gql, GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const graphQLClient = new GraphQLClient(endpoint, {
    headers: {
      authorization: "Bearer MY_TOKEN",
    },
  });

  const mutation = gql`
    mutation AddMovie($title: String!, $releaseDate: Int!) {
      insert_movies_one(object: { title: $title, releaseDate: $releaseDate }) {
        title
        releaseDate
      }
    }
  `;

  const variables = {
    title: "Inception",
    releaseDate: 2010,
  };
  const data = await graphQLClient.request(mutation, variables);

  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/using-variables.ts

Error handling

import { gql, request } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const query = gql`
    {
      Movie(title: "Inception") {
        releaseDate
        actors {
          fullname # "Cannot query field 'fullname' on type 'Actor'. Did you mean 'name'?"
        }
      }
    }
  `;

  try {
    const data = await request(endpoint, query);
    console.log(JSON.stringify(data, undefined, 2));
  } catch (error) {
    console.error(JSON.stringify(error, undefined, 2));
    process.exit(1);
  }
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/error-handling.ts

Using a custom fetch method

import { GraphQLClient } from "https://deno.land/x/graphql_request/mod.ts";
import { wrapFetch } from "https://deno.land/x/[email protected]/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const graphQLClient = new GraphQLClient(endpoint, { fetch: wrapFetch() });

  const query = /* GraphQL */ `
    {
      Movie(title: "Inception") {
        releaseDate
        actors {
          name
        }
      }
    }
  `;

  interface TData {
    Movie: { releaseDate: string; actors: Array<{ name: string }> };
  }

  const data = await graphQLClient.rawRequest<TData>(query);
  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

Receiving a raw response

The request method will return the data or errors key from the response. If you need to access the extensions key you can use the rawRequest method:

import { gql, rawRequest } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.graph.cool/simple/v1/cixos23120m0n0173veiiwrjr";

  const query = gql`
    {
      Movie(title: "Inception") {
        releaseDate
        actors {
          name
        }
      }
    }
  `;

  const { data, errors, extensions, headers, status } = await rawRequest(
    endpoint,
    query,
  );
  console.log(
    JSON.stringify({ data, errors, extensions, headers, status }, undefined, 2),
  );
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/receiving-a-raw-response.ts

File Upload

Browser

import { request } from "graphql-request";

const UploadUserAvatar = gql`
  mutation uploadUserAvatar($userId: Int!, $file: Upload!) {
    updateUser(id: $userId, input: { avatar: $file })
  }
`;

request("/api/graphql", UploadUserAvatar, {
  userId: 1,
  file: document.querySelector("input#avatar").files[0],
});

Node

import { createReadStream } from "fs";
import { request } from "graphql-request";

const UploadUserAvatar = gql`
  mutation uploadUserAvatar($userId: Int!, $file: Upload!) {
    updateUser(id: $userId, input: { avatar: $file })
  }
`;

request("/api/graphql", UploadUserAvatar, {
  userId: 1,
  file: createReadStream("./avatar.img"),
});

Deno

import { readableStreamFromReader as toStream } from "https://deno.land/std/io/mod.ts";
import { request } from "https://deno.land/x/graphql_request/mod.ts";

const UploadUserAvatar = gql`
  mutation uploadUserAvatar($userId: Int!, $file: Upload!) {
    updateUser(id: $userId, input: { avatar: $file })
  }
`;

request("/api/graphql", UploadUserAvatar, {
  userId: 1,
  file: toStream(await Deno.open(("./avatar.img")),
});

Batching

It is possible with graphql-request to use batching via the batchRequests() function. Example available at examples/batching-requests.ts

import { batchRequests } from "https://deno.land/x/graphql_request/mod.ts";

const main = async () => {
  const endpoint = "https://api.spacex.land/graphql/";

  const query1 = /* GraphQL */ `
    query ($id: ID!) {
      capsule(id: $id) {
        id
        landings
      }
    }
  `;

  const query2 = /* GraphQL */ `
    {
      rockets(limit: 10) {
        active
      }
    }
  `;

  const data = await batchRequests(endpoint, [
    { document: query1, variables: { id: "C105" } },
    { document: query2 },
  ]);
  console.log(JSON.stringify(data, undefined, 2));
};

try {
  main();
} catch (error) {
  console.error(error);
}

TypeScript Source

deno run --allow-net examples/batching-requests.ts

Cancellation

It is possible to cancel a request using an AbortController signal.

You can define the signal in the GraphQLClient constructor:

const abortController = new AbortController();

const client = new GraphQLClient(endpoint, { signal: abortController.signal });
client.request(query);

abortController.abort();

You can also set the signal per request (this will override an existing GraphQLClient signal):

const abortController = new AbortController();

const client = new GraphQLClient(endpoint);
client.request({ document: query, signal: abortController.signal });

abortController.abort();

In Node environment, AbortController is supported since version v14.17.0. For Node.js v12 you can use abort-controller polyfill.

 import 'abort-controller/polyfill'

 const abortController = new AbortController()

FAQ

Why do I have to install graphql?

graphql-request uses methods exposed by the graphql package to handle some internal logic. On top of that, for TypeScript users, some types are used from the graphql package to provide better typings.

Do I need to wrap my GraphQL documents inside the gql template exported by graphql-request?

No. It is there for convenience so that you can get the tooling support like prettier formatting and IDE syntax highlighting. You can use gql from graphql-tag if you need it for some reason too.

What's the difference between graphql-request, Apollo and Relay?

graphql-request is the most minimal and simplest to use GraphQL client. It's perfect for small scripts or simple apps.

Compared to GraphQL clients like Apollo or Relay, graphql-request doesn't have a built-in cache and has no integrations for frontend frameworks. The goal is to keep the package and API as minimal as possible.