JavaScript PubSub in 163 Bytes
pubsub in <100 bytes. Contribute to hassanshaikley/pico-pubsub development by creating an account on GitHub.
JavaScript PubSub in 163 Bytes launched on March 31, 2025 with 104 votes, #415 of 7,215 launches that month and more than 95% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
JavaScript PubSub in 163 Bytes is a lightweight publish-subscribe messaging library for JavaScript developers. It enables decoupled communication between application components through a simple event-based system. The tool is designed for developers who need basic pub-sub functionality without heavyweight dependencies. What stands out is its extremely small footprint at just 163 bytes, making it ideal for projects where code size matters.
written from the facts on this page · September 2026
From the sources
The smallest PubSub library possible. Zero Dependencies. 99 bytes. I wrote this article a while back. But I realized...why not just publish the code? Built with JS13K games in mind. Such as cred which is unfortunately in need of some weight loss soon, as it is almost 25KB now. If you have any ideas that may trim off even one single byte please share it. Create an issue! I don't mind. let t = { } ; sub = ( e , c ) => ( ( t [ e ] ??= new Set ( ) ) . add ( c ) , ( _ ) => t [ e ] . delete ( c ) ) ; pub = ( e , d ) => t [ e ] ?. forEach ( ( f ) => f ( d ) ) ; Usage npm install pico-pubsub const unsub = sub ( 'jump' , function ( anything ) { console . log ( "someone jumped - " + anything ) } ) ;…from github.com
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