@supabase/realtime-js
Version:
Listen to realtime updates to your PostgreSQL database
36 lines • 1.19 kB
JavaScript
/**
* Creates a timer that accepts a `timerCalc` function to perform calculated timeout retries, such as exponential backoff.
*
* @example
* let reconnectTimer = new Timer(() => this.connect(), function(tries){
* return [1000, 5000, 10000][tries - 1] || 10000
* })
* reconnectTimer.scheduleTimeout() // fires after 1000
* reconnectTimer.scheduleTimeout() // fires after 5000
* reconnectTimer.reset()
* reconnectTimer.scheduleTimeout() // fires after 1000
*/
export default class Timer {
constructor(callback, timerCalc) {
this.callback = callback;
this.timerCalc = timerCalc;
this.timer = undefined;
this.tries = 0;
this.callback = callback;
this.timerCalc = timerCalc;
}
reset() {
this.tries = 0;
clearTimeout(this.timer);
this.timer = undefined;
}
// Cancels any previous scheduleTimeout and schedules callback
scheduleTimeout() {
clearTimeout(this.timer);
this.timer = setTimeout(() => {
this.tries = this.tries + 1;
this.callback();
}, this.timerCalc(this.tries + 1));
}
}
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