react-apollo-hooks

Use Apollo Client as React hooks.

Warning: Hooks are currently a React RFC and not ready for production. Use at minimum [email protected] to use this package.

Installation

npm install react-apollo-hooks

Example

https://codesandbox.io/s/8819w85jn9 is a port of Pupstagram sample app to react-apollo-hooks.

API

ApolloProvider

Similar to ApolloProvider from react-apollo. Both packages can be used together, if you want to try out using hooks and retain Query, Mutation, Subscription, etc. HOCs from react-apollo without having to rewrite existing components throughout your app.

In order for this package to work, you need to wrap your component tree with ApolloProvider at an appropriate level, encapsulating all components which will use hooks.

Standalone usage

If you would like to use this package standalone, this can be done with:

import React from 'react';
import { render } from 'react-dom';

import { ApolloProvider } from 'react-apollo-hooks';

const client = ... // create Apollo client

const App = () => (
  <ApolloProvider client={client}>
    <MyRootComponent />
  </ApolloProvider>
);

render(<App />, document.getElementById('root'));

Usage with react-apollo

To use with react-apollo's ApolloProvider already present in your project:

import React from 'react';
import { render } from 'react-dom';

import { ApolloProvider } from 'react-apollo';
import { ApolloProvider as ApolloHooksProvider } from 'react-apollo-hooks';

const client = ... // create Apollo client

const App = () => (
  <ApolloProvider client={client}>
    <ApolloHooksProvider client={client}>
      <MyRootComponent />
   </ApolloHooksProvider>
  </ApolloProvider>
);

render(<App />, document.getElementById('root'));

useQuery

import gql from 'graphql-tag';
import { useQuery } from 'react-apollo-hooks';

const GET_DOGS = gql`
  {
    dogs {
      id
      breed
    }
  }
`;

const Dogs = () => {
  const { data, error } = useQuery(GET_DOGS);
  if (error) return `Error! ${error.message}`;

  return (
    <ul>
      {data.dogs.map(dog => (
        <li key={dog.id}>{dog.breed}</li>
      ))}
    </ul>
  );
};

To check if data is loaded use the Suspense component:

import React, { Suspense } from 'react';

const MyComponent = () => {
  return (
    return (
      <Suspense fallback={<div>Loading...</div>}>
        <Dogs />
      </Suspense>
    )
  );
}

Alternatively you can use the useQuery hook without suspense with the { suspend: false } option. It's required if you want to use non-standard fetch policy. You have to manage loading state by yourself in that case:

import gql from 'graphql-tag';
import { useQuery } from 'react-apollo-hooks';

const GET_DOGS = gql`...`;

const Dogs = () => {
  const { data, error, loading } = useQuery(GET_DOGS, { suspend: false });
  if (loading) return <div>Loading...</div>;
  if (error) return `Error! ${error.message}`;

  return (
    <ul>
      {data.dogs.map(dog => (
        <li key={dog.id}>{dog.breed}</li>
      ))}
    </ul>
  );
};

useMutation

import gql from 'graphql-tag';
import { useMutation } from 'react-apollo-hooks';

const TOGGLE_LIKED_PHOTO = gql`
  mutation toggleLikedPhoto($id: String!) {
    toggleLikedPhoto(id: $id) @client
  }
`;

const DogWithLikes = ({ url, imageId, isLiked }) => {
  const toggleLike = useMutation(TOGGLE_LIKED_PHOTO, {
    variables: { id: imageId },
  });
  return (
    <div>
      <img src={url} />
      <button onClick={toggleLike}>{isLiked ? 'Stop liking' : 'like'}</button>
    </div>
  );
};

You can provide any mutation options as an argument to the useMutation hook or to the function returned by it, e. g.:

function AddTaskForm() {
  const inputRef = useRef();
  const addTask = useMutation(ADD_TASK_MUTATION, {
    update: (proxy, mutationResult) => {
      /* your custom update logic */
    },
    variables: {
      text: inputRef.current.value,
    },
  });

  return (
    <form>
      <input ref={inputRef} />
      <button onClick={addTask}>Add task</button>
    </form>
  );
}

Or:

function TasksWithMutation() {
  const toggleTask = useMutation(TOGGLE_TASK_MUTATION);

  return (
    <TaskList
      onChange={task => toggleTask({ variables: { taskId: task.id } })}
      tasks={data.tasks}
    />
  );
}

useApolloClient

const MyComponent = () => {
  const client = useApolloClient();
  // now you have access to the Apollo client
};

Testing

An example showing how to test components using react-apollo-hooks: https://github.com/trojanowski/react-apollo-hooks-sample-test

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