17 - 计数器

[sly3464]

<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 baseValue = ref(initialValue)
  const count = ref(initialValue)
  const inc = () => {
    if (count.value < options.max)
      count.value++
  }
  const dec = () => {
    if (count.value > options.min)
      count.value--
  }
  const reset = () => {
      count.value = baseValue.value
  }

  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>