Vue.directive('clickOutSide', {
    bind(el, binding, vnode) {
      el.handler = function(e) {
        if (el.contains(e.target)) {
          return false
        }
        // vnode.context[binding.expression] = false
        binding.value()
      }
      el.stopProp = function(event) {
        event.stopPropagation()
      }
      el.addEventListener('click', el.stopProp)
      document.body.addEventListener('click', el.handler)
    },
    unbind(el, binding) {
      el.removeEventListener('click', el.stopProp)
      document.body.removeEventListener('click', el.handler)
    }
  })
  new Vue({
    el: '#app',
    router,
    store,
    i18n,
    components: { App },
    template: '<App/>'
  })

<div class="tip-register" v-clickOutSide="handleClose"></div>

handleClose() {
// *****
}

https://juejin.im/post/5bf2c6766fb9a049bc4c42ef