useTimer hook

gistfile1.txt

import { ref, onUnmounted } from 'vue';

export const useTimer = (callback = () => { }, step = 1000) => {
  let timerVariableId = null;
  let times = 0;
  const isPaused = ref(false);

  const stop = () => {
    if (timerVariableId) {
      clearInterval(timerVariableId);
      timerVariableId = null;
      resume();
    }
  }

  const start = () => {
    stop();
    if (!timerVariableId) {
      times = 0;
      timerVariableId = setInterval(() => {
        if (!isPaused.value) {
          times++;
          callback(times, step * times);
        }
      }, step)
    }
  }

  const pause = () => {
    isPaused.value = true;
  }

  const resume = () => {
    isPaused.value = false;
  }

  onUnmounted(() => {
    if (timerVariableId) {
      clearInterval(timerVariableId);
    }
  })

  return {
    start,
    stop,
    pause,
    resume,
    isPaused
  }
}