17 - useCounter

[LauGM]

<script setup lang='ts'>
import { ref } from 'vue';
interface UseCounterOptions {
  min?: number
  max?: number
}

/**
 * Implement the composable function
 * Make sure the function works correctly
*/
function useCounter(initialValue = 0, options: UseCounterOptions = {}) {
  const count = ref(initialValue);

  const inc=()=> options.max > count.value && count.value++;
  const dec=()=> options.min < count.value && count.value--;
  const reset=()=>count.value = initialValue;
  return {count, inc, dec, reset}
}

const { count, inc, dec, reset } = useCounter(0, { min: 0, max: 10 })

</script>

<template>
  <p>Count: {{ count }}</p>
  <button @click="inc">
    inc
  </button>
  <button @click="dec">
    dec
  </button>
  <button @click="reset">
    reset
  </button>
</template>