---
id: ssh2-rivetkit-client-javascript
name: "rivetkit-client-javascript"
url: https://skills.yangsir.net/skill/ssh2-rivetkit-client-javascript
author: rivet-dev
domain: ai-app-building-integration
tags: ["rivetkit", "javascript", "client-side-development", "ai-agent-integration", "web-development"]
install_count: 5900
rating: 4.40 (26 reviews)
github: https://github.com/rivet-dev/skills
---

# rivetkit-client-javascript

> RivetKit JavaScript客户端指南，适用于浏览器、Node.js或Bun客户端。

**Stats**: 5,900 installs · 4.4/5 (26 reviews)

## Before / After 对比

### RivetKit JavaScript客户端开发指南

## Readme

# RivetKit JavaScript Client

Use this skill when building JavaScript clients (browser, Node.js, or Bun) that connect to Rivet Actors with `rivetkit/client`.

## First Steps

1. Install the client (latest: 2.1.6)
   ```bash
   npm install rivetkit@2.1.6
   ```
2. Create a client with `createClient()` and call actor actions.

## Error Handling Policy

- Prefer fail-fast behavior by default.
- Avoid `try/catch` unless absolutely needed.
- If a `catch` is used, handle the error explicitly, at minimum by logging it.

## Getting Started

See the [backend quickstart guide](/docs/actors/quickstart/backend) for getting started.

## Minimal Client

```ts client.ts
import { createClient } from "rivetkit/client";
import type { registry } from "./actors";

const client = createClient<typeof registry>({
  endpoint: "https://my-namespace:pk_...@api.rivet.dev",
});
const counter = client.counter.getOrCreate(["my-counter"]);
const count = await counter.increment(1);
```

```ts actors.ts @hide
import { actor, setup } from "rivetkit";

export const counter = actor({
  state: { count: 0 },
  actions: {
    increment: (c, x: number) => {
      c.state.count += x;
      return c.state.count;
    },
  },
});

export const registry = setup({
  use: { counter },
});
```

## Stateless vs Stateful

```typescript
import { createClient } from "rivetkit/client";

const client = createClient();
const handle = client.counter.getOrCreate(["my-counter"]);

// Stateless: each call is independent
await handle.increment(1);

// Stateful: keep a connection open for realtime events
const conn = handle.connect();
conn.on("count", (value) => console.log(value));
await conn.increment(1);
```

## Getting Actors

```typescript
import { createClient } from "rivetkit/client";

const client = createClient();
const room = client.chatRoom.getOrCreate(["room-42"]);
const existing = client.chatRoom.get(["room-42"]);

const created = await client.game.create(["game-1"], {
  input: { mode: "ranked" },
});

const byId = client.chatRoom.getForId("actor-id");
const resolvedId = await room.resolve();
```

## Connection Parameters

```typescript
import { createClient } from "rivetkit/client";

const client = createClient();
const chat = client.chatRoom.getOrCreate(["general"], {
  params: { authToken: "jwt-token-here" },
});

const conn = chat.connect();
```

## Subscribing to Events

```typescript
import { createClient } from "rivetkit/client";

const client = createClient();
const conn = client.chatRoom.getOrCreate(["general"]).connect();
conn.on("message", (msg) => console.log(msg));
conn.once("gameOver", () => console.log("done"));
```

## Connection Lifecycle

```typescript
import { createClient } from "rivetkit/client";

const client = createClient();
const conn = client.chatRoom.getOrCreate(["general"]).connect();

conn.onOpen(() => console.log("connected"));
conn.onClose(() => console.log("disconnected"));
conn.onError((err) => console.error("error:", err));
conn.onStatusChange((status) => console.log("status:", status));

await conn.dispose();
```

## Low-Level HTTP & WebSocket

For actors that implement `onRequest` or `onWebSocket`, call them directly:

```ts @nocheck
import { createClient } from "rivetkit/client";

const client = createClient();
const handle = client.chatRoom.getOrCreate(["general"]);

const response = await handle.fetch("history");
const history = await response.json();

const ws = await handle.webSocket("stream");
ws.addEventListener("message", (event) => {
  console.log("message:", event.data);
});
ws.send("hello");
```

## Calling from Backend

```typescript
import { Hono } from "hono";
import { createClient } from "rivetkit/client";

const app = new Hono();
const client = createClient();

app.post("/increment/:name", async (c) => {
  const counterHandle = client.counter.getOrCreate([c.req.param("name")]);
  const newCount = await counterHandle.increment(1);
  return c.json({ count: newCount });
});
```

## Error Handling

```typescript
import { ActorError } from "rivetkit/client";
import { createClient } from "rivetkit/client";

const client = createClient();

try {
  await client.user.getOrCreate(["user-123"]).updateUsername("ab");
} catch (error) {
  if (error instanceof ActorError) {
    console.log(error.code, error.metadata);
  }
}
```

## Concepts

### Keys

Keys uniquely identify actor instances. Use compound keys (arrays) for hierarchical addressing:

```ts client.ts
import { createClient } from "rivetkit/client";
import type { registry } from "./actors";

const client = createClient<typeof registry>();

// Compound key: [org, room]
client.chatRoom.getOrCreate(["org-acme", "general"]);
```

```ts actors.ts @hide
import { actor, setup } from "rivetkit";

export const chatRoom = actor({
  state: { messages: [] as string[] },
  actions: {
    getRoomInfo: (c) => ({ org: c.key[0], room: c.key[1] }),
  },
});

export const registry = setup({
  use: { chatRoom },
});
```

Don't build keys with string interpolation like `"org:${userId}"` when `userId` contains user data. Use arrays instead to prevent key injection attacks.

### Environment Variables

`createClient()` automatically reads:

- `RIVET_ENDPOINT` (endpoint)
- `RIVET_NAMESPACE`
- `RIVET_TOKEN`
- `RIVET_RUNNER`

Defaults to `window.location.origin + "/api/rivet"` in the browser or `http://127.0.0.1:6420` on the server when unset.

### Endpoint Format

Endpoints support URL auth syntax:

```
https://namespace:token@api.rivet.dev
```

You can also pass the endpoint without auth and provide `RIVET_NAMESPACE` and `RIVET_TOKEN` separately. For serverless deployments, use your app's `/api/rivet` URL. See [Endpoints](/docs/general/endpoints#url-auth-syntax) for details.

## API Reference

**Package:** [rivetkit](https://www.npmjs.com/package/rivetkit)

See the [RivetKit client overview](/docs/clients).

- [`createClient`](/typedoc/functions/rivetkit.client_mod.createClient.html) - Create a client
- [`createEngineDriver`](/typedoc/functions/rivetkit.mod.createEngineDriver.html) - Engine driver
- [`DriverConfig`](/typedoc/types/rivetkit.mod.DriverConfig.html) - Driver configuration
- [`Client`](/typedoc/types/rivetkit.mod.Client.html) - Client type

## Need More Than the Client?

If you need more about Rivet Actors, registries, or server-side RivetKit, add the main skill:

```bash
npx skills add rivet-dev/skills
```

Then use the `rivetkit` skill for backend guidance.



---
*Source: https://skills.yangsir.net/skill/ssh2-rivetkit-client-javascript*
*Markdown mirror: https://skills.yangsir.net/api/skill/ssh2-rivetkit-client-javascript/markdown*