Data Client

Define your async methods. Use them synchronously in React. Instantly mutate the data and automatically update all usages.

For REST, GraphQL, Websockets+SSE and more

Installation

npm install --save @data-client/react @data-client/rest @data-client/test @data-client/hooks

For more details, see the Installation docs page.

Usage

Simple TypeScript definition

class User extends Entity {
  id = '';
  username = '';

  pk() {
    return this.id;
  }
}

class Article extends Entity {
  id = '';
  title = '';
  body = '';
  author = User.fromJS();
  createdAt = Temporal.Instant.fromEpochSeconds(0);

  pk() {
    return this.id;
  }

  static schema = {
    author: User,
    createdAt: Temporal.Instant.from,
  };
}

Create collection of API Endpoints

const UserResource = createResource({
  path: '/users/:id',
  schema: User,
  optimistic: true,
});

const ArticleResource = createResource({
  path: '/articles/:id',
  schema: Article,
  searchParams: {} as { author?: string },
  optimistic: true,
  paginationField: 'cursor',
});

One line data binding

const article = useSuspense(ArticleResource.get, { id });
return (
  <article>
    <h2>
      {article.title} by {article.author.username}
    </h2>
    <p>{article.body}</p>
  </article>
);

Reactive Mutations

const ctrl = useController();
return (
  <CreateProfileForm
    onSubmit={data => ctrl.fetch(UserResource.getList.push, { id }, data)}
  />
  <ProfileForm
    onSubmit={data => ctrl.fetch(UserResource.update, { id }, data)}
  />
  <button onClick={() => ctrl.fetch(UserResource.delete, { id })}>Delete</button>
);

Subscriptions

const price = useLive(PriceResource.get, { symbol });
return price.value;

Type-safe Imperative Actions

const ctrl = useController();
ctrl.expireAll(ArticleResource.getList);
ctrl.invalidate(ArticleResource.get, { id });
ctrl.invalidateAll(ArticleResource.getList);
ctrl.setResponse(ArticleResource.get, { id }, articleData);
ctrl.fetch(ArticleResource.get, { id });

Programmatic queries

const queryTotalVotes = new Query(
  new schema.All(Post),
  (posts, { userId } = {}) => {
    if (userId !== undefined)
      posts = posts.filter(post => post.userId === userId);
    return posts.reduce((total, post) => total + post.votes, 0);
  },
);

const totalVotes = useCache(queryTotalVotes);
const totalVotesForUser = useCache(queryTotalVotes, { userId });

Powerful Middlewares

class LoggingManager implements Manager {
  getMiddleware = (): Middleware => controller => next => async action => {
    console.log('before', action, controller.getState());
    await next(action);
    console.log('after', action, controller.getState());
  };

  cleanup() {}
}

Integrated data mocking

const fixtures = [
  {
    endpoint: ArticleResource.getList,
    args: [{ maxResults: 10 }] as const,
    response: [
      {
        id: '5',
        title: 'first post',
        body: 'have a merry christmas',
        author: { id: '10', username: 'bob' },
        createdAt: new Date(0).toISOString(),
      },
      {
        id: '532',
        title: 'second post',
        body: 'never again',
        author: { id: '10', username: 'bob' },
        createdAt: new Date(0).toISOString(),
      },
    ],
  },
  {
    endpoint: ArticleResource.update,
    response: ({ id }, body) => ({
      ...body,
      id,
    }),
  },
];

const Story = () => (
  <MockResolver fixtures={options[result]}>
    <ArticleList maxResults={10} />
  </MockResolver>
);

...all typed ...fast ...and consistent

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Features

• [x] Strong Typescript inference
• [x] 🛌 React Suspense support
• [x] 🧵 React 18 Concurrent mode compatible
• [x] 💦 Partial Hydration Server Side Rendering
• [x] 🎣 Declarative API
• [x] 📝 Composition over configuration
• [x] 💰 Normalized caching
• [x] 💥 Tiny bundle footprint
• [x] 🛑 Automatic overfetching elimination
• [x] ✨ Optimistic updates
• [x] 🧘 Flexible to fit any API design (one size fits all)
• [x] 🔧 Debugging and inspection via browser extension
• [x] 🌳 Tree-shakable (only use what you need)
• [x] 🔁 Subscriptions
• [x] ♻️ Optional redux integration
• [x] 📙 Storybook mocking
• [x] 📱 React Native support
• [x] ⚛️ NextJS support
• [x] 🚯 Declarative cache lifetime policy
• [x] 🧅 Composable middlewares
• [x] 💽 Global data consistency guarantees
• [x] 🏇 Automatic race condition elimination
• [x] 👯 Global referential equality guarantees

Examples

• Todo: |
• Github: |
• NextJS: |