supabase-swr

A React library to use supabase-js with swr.

Install

Using npm.

npm install supabase-swr supabase-js swr

Using yarn.

yarn add supabase-swr supabase-js swr

Usage

Crate a supabase client and pass it to the SwrSupabaseContext.Provider.

import { createClient } from 'supabase-js';
import { SwrSupabaseContext } from 'supabase-swr';

const client = createClient('https://xyzcompany.supabase.co', 'public-anon-key');

function App() {
  return (
    <SwrSupabaseContext.Provider value={client}>
      <Routes />
    </SwrSupabaseContext.Provider>  
  )
}

Now you can use in any component the api of supabase-swr.

import React from 'react';
import { useClient, useSelect, useQuery } from 'supabase-swr';

type Todo = {
  id: string,
  name: string,
  created_at: string,
};

const Todos = () => {
  const todosQuery = useQuery<Todo>('todos', {
    filter: (query) => query.order('created_at', { ascending: false }),
  }, []);
  const {
    data: {
      data: todos,
    },
    mutate,
  } = useSelect(todosQuery, {
    // any swr config
    revalidateOnMount: true,
    suspense: true,
  });
  return (
    <ul>
      {todos.map((todo: Todo) => (
        <li key={todo.id}>
          {todo.name}
        </li>
      ))}
    </ul>
  );
}

References

• supabase-js
• swr

API

hooks

useClient

Retrieve the supabase-js client instance provided to SwrSupabaseContext.Provider.

export default function (props) {
  const client = useClient();
  // ...
  return (<>...</>)
}

useQuery

Create a Query to use with useSelect and other hooks. The created query is also a swr key and can be used with mutate.

type Todo = {}

export default function (props) {
  const query = useQuery<Todo>('todos', {
    // the filter ro apply to the query
    filter: (q) => q.order('created_at', { ascending: false }),
    head: false,
    count: 'exact',
  });
  const {
    data
  } = useSelect(selectKey, {
    // swr config here
  });
  // ...
  return (<></>)
}

useSelect

Retrieve the table data requested. Return and SwrResponse.

type Todo = {}

export default function (props) {
  const query = useQuery<Todo>('todos', {
    // the filter ro apply to the query
    filter: (q) => q.order('created_at', { ascending: false }),
    head: false,
    count: 'exact',
  });
  const {
    data
  } = useSelect(query, {
    // swr config here
  });
  // ...
  return (<></>)
}

useSession

Subscribe to authStateChange event and always return the current session. Useful to use inside component that need to change when the user sign-in or sign-out.

export default function (props) {
  const session = useSession();
  if (!session) return <>Need to sign-in to access this feature</>
  return (<>...</>)
}

createQuery

Create a global Query to use with useSelect and other hooks. The created query is also a swr key and can be used with mutate.

import { useSWRConfig } from 'swr';
import { useState } from 'react';
import { createClient } from 'supabase-js';
import { SwrSupabaseContext, useSelect, createQuery } from 'supabase-swr';

const client = createClient('https://xyzcompany.supabase.co', 'public-anon-key');

type Todo = {
  id: string,
  name: string,
  created_at: string,
}

const todosQuery = createQuery<Todo>('todos', {
  columns: '*',
  // the filter ro apply to the query
  filter: (q) => q.order('created_at', { ascending: false }),
})

function AddTodoForm() {
  const { mutate } = useSWRConfig()
  const client = useClient()
  const [todoName, setTodoName] = useState('')
  const addTodo = () => {
    client.from<Todo>('todos').insert({
      name: todoName,
    }).then(() => {
      // update the todosQuery inside the TodosList
      mutate(todosQuery)
      setTodoName('')
    })
  }
  return (
    <form name="add-todo">
      <input name="todo-name" value={todoName} onChange={(e) => setTodoName(e.target.value)} />
      <button onClick={addTodo}>
        Add Todo
      </button>  
    </form>
  )
}

function TodosList() {
  const {
    data: {
      data: todos,
    },
  } = useSelect(todosQuery, {
    // swr config here
  });
  // ...
  return (
    <ul>
      {todos.map((todo: Todo) => (
        <li key={todo.id}>
          {todo.name}
        </li>
      ))}
    </ul>
  );
}

export default function App() {
  return (
    <SwrSupabaseContext.Provider value={client}>
      <TodosList />
      <AddTodoForm />
    </SwrSupabaseContext.Provider>
  )
}

---

Inspired by react-supabase.