1，用节流的思想来实现（在一定时间内只能出发一次）
Vue.directive('preventReClick', {
inserted(el, binding) {
el.addEventListener('click', () => {
if (!el.disabled) {
el.disabled = true
setTimeout(() => {
el.disabled = false
}, binding.value || 3000)
}
})
}
})
<el-button v-preventReClick type="primary" @click="comfirm">确定</el-button>