GramJS

A Telegram client written in JavaScript for Node.js and browsers, with its core being based on Telethon.

How to get started

Here you'll learn how to obtain necessary information to create telegram application, authorize into your account and send yourself a message.

Note that if you want to use a GramJS inside of a browser, refer to this instructions.

Install GramJS:

$ npm i telegram -D

Install input package, we'll use it to prompt ourselves inside terminal for login information:

$ npm i input -D

After installation, you'll need to obtain an API ID and hash:

Login into your telegram account
Then click "API development tools" and fill your application details (only app title and short name required)
Finally, click "Create application"

Never share any API/authorization details, that will compromise your application and account.

When you've successfully created the application, change apiId and apiHash on what you got from telegram.

Then run this code to send a message to yourself.

import { TelegramClient } from "telegram";
import { StringSession } from "telegram/sessions";
import input from "input";

const apiId = 123456;
const apiHash = "123456abcdfg";
const stringSession = new StringSession(""); // fill this later with the value from session.save()

(async () => {
  console.log("Loading interactive example...");
  const client = new TelegramClient(stringSession, apiId, apiHash, {
    connectionRetries: 5,
  });
  await client.start({
    phoneNumber: async () => await input.text("Please enter your number: "),
    password: async () => await input.text("Please enter your password: "),
    phoneCode: async () =>
      await input.text("Please enter the code you received: "),
    onError: (err) => console.log(err),
  });
  console.log("You should now be connected.");
  console.log(client.session.save()); // Save this string to avoid logging in again
  await client.sendMessage("me", { message: "Hello!" });
})();

Note that you can also save auth key to a folder instead of a string, change stringSession into this:
const storeSession = new StoreSession("folder_name");

Be sure to save output of client.session.save() into stringSession or storeSession variable to avoid logging in again.

Running GramJS inside browsers

GramJS works great in combination with frontend libraries such as React, Vue and others.

While working within browsers, GramJS is using localStorage to cache the layers.

To get a browser bundle of GramJS, use the following command:

NODE_ENV=production npx webpack

Calling the raw API

To use raw telegram API methods use invoke function.

await client.invoke(new RequestClass(args));

Documentation

General documentation, use cases, quick start, refer to gram.js.org, or older version of documentation (will be removed in the future).

For more advanced documentation refer to gram.js.org/beta (work in progress).

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