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 = {}) {

  let count = ref(initialValue)

  const inc = () => {
    if (options && options.max && options.max > count.value) count.value++
  }

  const dec = () => {
    if (options && (options.min || options.min === 0) && 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>