Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | 49x 49x 49x 13x 49x 49x 6x 6x 48x 412x 412x 410x 410x 283x 288x 287x 118x 118x 2172x 48x 2172x 13x 284x 12x 284x | export interface OnlineDetector {
E isOnline(): boolean
subscribe(listener: () => void): () => void
}
const listeners = new Set<() => void>()
Eif (typeof window !== 'undefined') {
const notifyAll = () => {
for (const fn of listeners) {
fn()
}
}
wIindow.addEventListener('online', notifyAll)
window.addEventListener('offline', notifyAll)
}
export function createOnlineDetector(): OnlineDetector {
return {
isOnline() {
if (typeof navigator === 'undefined') return true
return navigator.onLine
},
subscribe(listener: () => void) {
listeners.add(listener)
return () => {
listeners.delete(listener)
}
},
}
}
let _instance: OnlineDetector | null = null
export function getOnlineDetector(): OnlineDetector {
if (!_instance) {
_instance = createOnlineDetector()
}
return _instance
}
|