35 lines
1007 B
JavaScript
35 lines
1007 B
JavaScript
|
|
// promiseInterval - replacement for setInterval for promises, starts counting
|
|
// the interval only after a promise is done instead of immediately.
|
|
// - promiseCall is a function that returns a promise, it's called the first
|
|
// time after the first interval.
|
|
// - interval is the interval delay in ms.
|
|
|
|
export const promiseInterval = (promiseCall, interval) => {
|
|
let stopped = false
|
|
let timeout = null
|
|
|
|
const func = () => {
|
|
const promise = promiseCall()
|
|
// something unexpected happened and promiseCall did not
|
|
// return a promise, abort the loop.
|
|
if (!(promise && promise.finally)) {
|
|
console.warn('promiseInterval: promise call did not return a promise, stopping interval.')
|
|
return
|
|
}
|
|
promise.finally(() => {
|
|
if (stopped) return
|
|
timeout = window.setTimeout(func, interval)
|
|
})
|
|
}
|
|
|
|
const stopFetcher = () => {
|
|
stopped = true
|
|
window.clearTimeout(timeout)
|
|
}
|
|
|
|
timeout = window.setTimeout(func, interval)
|
|
|
|
return { stop: stopFetcher }
|
|
}
|