20 - 节流点击指令

[maojiu-bb]

<script setup lang='ts'>

/**
 * Implement the custom directive
 * Make sure the `onClick` method only gets triggered once when clicked many times quickly
 * And you also need to support the debounce delay time option. e.g `v-debounce-click:ms`
 *
*/

const VDebounceClick = {
	beforeMounted: (el, binding) => {
    const delay = Number(binding.arg) || 200
    let timer = null
    el.addEventListener('click', () => {
      clearTimeout(timer);
      timer = setTimeout(() => {
        binding.value()
      }, delay)
    })
  }
}

function onClick() {
  console.log("Only triggered once when clicked many times quickly")
}

</script>

<template>
  <button v-debounce-click:200="onClick">
    Click on it many times quickly
  </button>
</template>