const emitter = dush()

​

const handler = () => {

  console.log('not called')

}

​

emitter.on('foo', handler)

emitter.off('foo', handler)

​

emitter.on('foo', (abc) => {

  console.log('called', abc) // => 'called 123'

})

emitter.emit('foo', 123)

​

// or removing all listeners of `foo`

emitter.off('foo')

emitter.emit('foo')