17 - 计数器

[zhChuXiao]

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

const { count, inc, dec, reset } = useCounter(5, { min: 5, max: 10 })

</script>

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