minimal-bsky-jetstream-client

A zero-dependency partial drop-in replacement for @skyware/jetstream in <1kB.

jetstream.js is <1.5kB raw, <0.9kB minified; tinyjetstream.js is <0.5kB raw, <0.4kB minified.

Usage

Jetstream conforms to a small subset of the @skyware/jetstream API. It supports onCreate, onDelete and onUpdate handlers, and only subscribes to the wantedCollections for which you've registered a handler. It also supports an optional endpoint constructor param.

TinyJetstream is even smaller. It only supports the default endpoint and only supports the onTweet handler.

In node, it can be imported via import { Jetstream } from 'mbjc' after running npm install mbjc.

In deno or the browser, it can be imported via CDN with import { Jetstream } from 'https://cdn.jsdelivr.net/npm/mbjc@1.0.3/jetstream.min.js'
.
``
import { Jetstream } from 'https://cdn.jsdelivr.net/npm/mbjc@1.0.3/jetstream.min.js'

const jetstream = new Jetstream({ endpoint: "jetstream1.us-east.bsky.network" });

jetstream.onTweet(event => {
console.log(event.commit.record.text);
});
// shorthand for .onCreate("app.bsky.feed.post"), as this is the most common use case.

jetstream.onCreate("app.bsky.graph.follow", event => {});
jetStream.onUpdate("app.bsky.feed.post", event => {});
jetstream.onDelete("app.bsky.feed.post", event => {});
jetstream.start();
jetstream.stop();
`


`
import { TinyJetstream as Jetstream } from 'https://cdn.jsdelivr.net/npm/mbjc@1.0.2/tinyjetstream.min.js'
const jetstream = new Jetstream();
jetstream.onTweet = e => { console.log(e); };
jetstream.start();
jetstream.stop();
`

CLI Usage

Run node index.js [n] to collect n tweets (default 10) and output them as JSON.

`bash
$ node index.js 2
[{"did":"did:plc:example1","text":"Hello world","timeMs":1727891234567},{"did":"did:plc:example2","text":"Another tweet","timeMs":1727891234568}]
``

Origin

This code is happily copied with small changes from https://jakelazaroff.com/words/drinking-from-the-bluesky-firehose/ where it is encouraged to "Use it, modify it and make something cool."