@nickpaustian/signal

A small typed signal, and the shape libraries code against.

import { Signal } from "@nickpaustian/signal"

const resized = new Signal<{ width: number; height: number }>()
const stop = resized.subscribe(({ width, height }) => console.log(width, height))
resized.emit({ width: 800, height: 600 })
stop()

• subscribe(listener, priority = 0) returns the unsubscribe; higher priorities run first.
• An emit made from inside a listener is queued and delivered after the current one, so listeners never interleave.
• size counts listeners; clear() drops them all.

Libraries that use signals should import the type SignalLike<T> and take a createSignal factory so a host can supply its own implementation; nothing here checks instanceof, so two copies of the package coexist without harm.