@phaserjs/phaser/time/AddTimer.js

Phaser 4

import { NOOP } from "./NOOP";
export function AddTimer(clock, config) {
  const {
    duration = 0,
    repeat = 0,
    delay = -1,
    onStart = NOOP,
    onUpdate = NOOP,
    onRepeat = NOOP,
    onComplete = NOOP
  } = config;
  const timer = {
    elapsed: duration,
    duration,
    repeat,
    delay,
    update: null,
    onStart,
    onUpdate,
    onRepeat,
    onComplete
  };
  timer.update = (delta) => {
    if (timer.delay > 0) {
      timer.delay -= delta;
      if (timer.delay < 0) {
        timer.delay = 0;
      } else {
        return false;
      }
    }
    if (timer.delay === 0) {
      timer.onStart();
      timer.delay = -1;
    }
    if (timer.delay === -1) {
      timer.elapsed -= delta;
      timer.onUpdate(delta, timer.elapsed / timer.duration);
      if (timer.elapsed <= 0) {
        if (timer.repeat > 0) {
          timer.repeat--;
          timer.elapsed = timer.duration;
          timer.onRepeat(timer.repeat);
        } else {
          timer.elapsed = 0;
          timer.onComplete();
        }
      }
    }
    return timer.elapsed === 0;
  };
  clock.events.add(timer);
}