Deko

Deko is a simple WebSocket client for Deno.

Warning

If you want to connect WebSocket on browsers, use WebSocket instead.

Features

• Easy to use.
• Supports custom headers.
• Passes the Autobahn testsuite. ¹
• Follows RFC 6455 WebSocket implementation.

Usage

This package is available on jsr.io.

Use deno add command to add this package to your project:

deno add @babia/deko

Then, import it in your source file:

import { Deko } from "@babia/deko";

Or use jsr: specifier if you want to use an install step.

import { Deko } from "jsr:@babia/deko@^0.1.2";

Examples

Open event handle

import { Deko, OpCode } from "@babia/deko";

const client = new Deko({ uri: "websocket url goes here" });

client.onOpen = () => {
  console.log("Connected to WebSocket server!");
};

await client.connect();

Receives a text message from WebSocket server

import { Deko, OpCode } from "@babia/deko";

const client = new Deko({ uri: "websocket url goes here" });

client.onMessage = (_, message) => {
  if (message.opcode === OpCode.TextFrame) {
    console.log(new TextDecoder().decode(message.payload));
  }
};

await client.connect();

Sends a message to WebSocket server

import { Deko, OpCode } from "@babia/deko";

const client = new Deko({ uri: "websocket url goes here" });

await client.connect();

setTimeout(async () => {
  await client.sendMessage("Hello World!");
}, 5000); // Sends message after 5 seconds

License

This repository/package is under MIT License. See LICENSE.

Footnotes

1. https://babiabeo.github.io/autobahn/deko/ ↩