evee.js

The blazing fast event library 🔥

Evee is a lightweight event library, written in just ~200 lines of JavaScript.
Evee exports ESM, CommonJS and Browser globals, so you can use it in any environment.

How to install

npm install evee # if you're using NPM
yarn add evee # if you're using Yarn

Introducing Evee 3

Evee now natively supports ESM and CommonJS.

We export two things:

• Evee (default export): The class you can use to create new instances of Evee.
• evee (named export): A pre-made instance of Evee so you can immediately start using it.

If you're planning to use Evee in NodeJS, you can now import it like this:

importEvee,{evee}from'evee';// If you're using ESM (import/export)const{default: Evee, evee }=require('evee');// If you're using CommonJS (require)

If you're planning to use Evee in the browser, you can now import it like this:

<!-- ESM if you're targeting modern browsers --><scripttype="module">importEvee,{evee}from'https://cdn.jsdelivr.net/npm/evee@3';</script><!-- Global export if you're targeting older browsers --><scriptsrc="https://cdn.jsdelivr.net/npm/evee@3/dist/browser/index.min.js"></script><script>// You can use the `Evee` (class) and `evee` (instance) globals here</script>

How to use

import{evee}from'evee'// Subscribe to the 'update' eventevee.on('update',e=>console.log(`Received event #${e.data}`))for(leti=0;i<100;i++){// Dispatch the 'update' eventevee.emit('update',i);}

You can also keep track of your event listeners unsubscribe from events you don't need anymore.

import{evee}from'evee'// Subscribe to the 'say' eventvarreceiver=evee.on('say',e=>console.log(e.data));// Dispatch the 'say' eventevee.emit('say','Hello, world!');// Unsubscribe from the 'say' eventevee.drop(receiver);

If you want to fire an event only once, you can do that too!
The event will be automatically removed after the first usage:

import{evee}from'evee'// Subscribe to the 'say' eventevee.once('say',e=>console.log('hello, world'));// Dispatch the 'say' event two timesevee.signal('say');evee.signal('say');// hello, world is only printed once!

As you can see, evee is really easy to use!
Start using evee today and stop worrying about slow events :)