| 87 | |
| 88 | |
| 89 | export class Subscriptions { |
| 90 | subs = new Set<() => void>(); |
| 91 | subscribe = (fn: () => void): (() => void) => { |
| 92 | this.subs.add(fn); |
| 93 | return () => this.subs.delete(fn); |
| 94 | } |
| 95 | notify = () => { |
| 96 | for (let sub of this.subs) { |
| 97 | sub(); |
| 98 | } |
| 99 | } |
| 100 | } |
| 101 | |
| 102 | export function useSubscriptions(subscription: Subscriptions | null) { |
| 103 | let [, refresh] = useReducer(a => a + 1, 0); |