vue 自定义指令，防止重复点击

  Vue.directive('pRClick', {

        inserted: function (el, binding) {

            el.addEventListener('click', () => {

                if (!el.disabled) {

                    el.disabled = true

                    setTimeout(() => {

                        el.disabled = false

                    }, binding.value || 3000)

                }

            })

        }

    }

<el-button v-pRClick ></el-button>