React
React is a popular JavaScript library for building user interfaces. The SurrealDB SDK for JavaScript can be used in your React applications to interact with your SurrealDB instance.
This guide walks you through setting up a connection provider and executing queries in a React project.
Prerequisites
Installing dependencies
In addition to surrealdb, this guide uses @tanstack/react-query to manage the asynchronous connection state. Install it alongside the SDK:
npm install --save surrealdb @tanstack/react-query
yarn add surrealdb @tanstack/react-query
pnpm install surrealdb @tanstack/react-query
Follow the installation guide for more information on how to install the SDK in your project.
Creating the connection provider
We recommend initializing the SDK in a Context Provider so the Surreal client is accessible anywhere in your component tree. The provider below manages the connection lifecycle, tracks connection status via TanStack Query, and cleans up on unmount.
The params prop accepts the same options as .connect(), including namespace, database, and authentication.
import { Surreal } from "surrealdb";
import { useMutation } from "@tanstack/react-query";
import React, { createContext, useContext, useEffect, useMemo, useCallback, useState } from "react";
interface SurrealProviderProps {
children: React.ReactNode;
endpoint: string;
client?: Surreal;
params?: Parameters<Surreal["connect"]>[1];
autoConnect?: boolean;
}
interface SurrealProviderState {
client: Surreal;
isConnecting: boolean;
isSuccess: boolean;
isError: boolean;
error: unknown;
connect: () => Promise<true>;
close: () => Promise<true>;
}
const SurrealContext = createContext<SurrealProviderState | undefined>(undefined);
export function SurrealProvider({
children,
client,
endpoint,
params,
autoConnect = true,
}: SurrealProviderProps) {
const [instance] = useState(() => client ?? new Surreal());
const {
mutateAsync: connectMutation,
isPending,
isSuccess,
isError,
error,
reset,
} = useMutation({
mutationFn: () => instance.connect(endpoint, params),
});
const connect = useCallback(() => connectMutation(), [connectMutation]);
const close = useCallback(() => instance.close(), [instance]);
useEffect(() => {
if (autoConnect) connect();
return () => {
reset();
instance.close();
};
}, [autoConnect, connect, reset, instance]);
const value: SurrealProviderState = useMemo(
() => ({ client: instance, isConnecting: isPending, isSuccess, isError, error, connect, close }),
[instance, isPending, isSuccess, isError, error, connect, close],
);
return <SurrealContext.Provider value={value}>{children}</SurrealContext.Provider>;
}
export function useSurreal() {
const context = useContext(SurrealContext);
if (!context) throw new Error("useSurreal must be used within a SurrealProvider");
return context;
}
export function useSurrealClient() {
return useSurreal().client;
}
Wrapping your application
In your top-level component, wrap the root with QueryClientProvider and SurrealProvider. Pass the endpoint and any connection options through the params prop.
import React from "react";
import ReactDOM from "react-dom/client";
import { QueryClient, QueryClientProvider } from "@tanstack/react-query";
import { SurrealProvider } from "./SurrealProvider";
import App from "./App";
const queryClient = new QueryClient();
ReactDOM.createRoot(document.getElementById("root")!).render(
<React.StrictMode>
<QueryClientProvider client={queryClient}>
<SurrealProvider
endpoint="ws://127.0.0.1:8000"
params={{
namespace: "surrealdb",
database: "docs",
authentication: {
username: "root",
password: "root",
},
}}
>
<App />
</SurrealProvider>
</QueryClientProvider>
</React.StrictMode>,
);
Executing queries
Use the useSurrealClient() hook to access the Surreal instance from any component. All query methods are available on the client, including .query(), .select(), .create(), and more.
import { useState, useEffect } from "react";
import { Table } from "surrealdb";
import { useSurreal, useSurrealClient } from "./SurrealProvider";
interface User {
id: string;
name: string;
email: string;
}
export function UserList() {
const { isConnecting, isError, error } = useSurreal();
const client = useSurrealClient();
const [users, setUsers] = useState<User[]>([]);
useEffect(() => {
client.select<User>(new Table("users"))
.then(setUsers)
.catch(console.error);
}, [client]);
if (isConnecting) return <p>Connecting...</p>;
if (isError) return <p>Connection failed: {String(error)}</p>;
return (
<ul>
{users.map((user) => (
<li key={String(user.id)}>{user.name} ({user.email})</li>
))}
</ul>
);
}
Handling authentication
You can build an authentication layer on top of the provider using the SDK’s .signin() and .signup() methods. The example below shows a minimal hook for record access authentication.
import { useSurrealClient } from "./SurrealProvider";
export function useAuth() {
const client = useSurrealClient();
async function login(email: string, password: string) {
return client.signin({
namespace: "surrealdb",
database: "docs",
access: "account",
variables: { email, password },
});
}
async function register(email: string, password: string) {
return client.signup({
namespace: "surrealdb",
database: "docs",
access: "account",
variables: { email, password },
});
}
async function logout() {
return client.invalidate();
}
return { login, register, logout };
}
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