element-ui-2.8.2-utils

after-leave

在元素上绑定after-leave事件,并在t+100ms后立即执行一遍此事件

clickoutside

点击元素外面才会触发的事件 zhuanlan.zhihu.com/p/63520317 实现方式 无法提前获得元素的外面是哪个元素.但这些元素一定是在document中

// 在document上绑定mousedown, mouseup, 其中 callback放在mouseup中
!Vue.prototype.$isServer && on(document, 'mousedown', e => (startClick = e));
// nodeList中存放了所有使用了v-clickoutside的元素

!Vue.prototype.$isServer && on(document, 'mouseup', e => {
// 逐个触发
  nodeList.forEach(node => node[ctx].documentHandler(e, startClick));
});
//documentHandler(e, startClick)
// 入参是 mouseup事件和 mousedonw 事件
// vnode 是绑定元素的 vnode el是绑定的元素
function(mouseup = {}, mousedown = {}) {
    if (!vnode ||
      !vnode.context ||
      !mouseup.target ||
      !mousedown.target ||
      el.contains(mouseup.target) || //点击的不能是当前元素
      el.contains(mousedown.target) ||
      el === mouseup.target ||
      (vnode.context.popperElm &&
      (vnode.context.popperElm.contains(mouseup.target) ||
      vnode.context.popperElm.contains(mousedown.target)))) return;

    if (binding.expression &&
      el[ctx].methodName &&
      vnode.context[el[ctx].methodName]) {
      vnode.context[el[ctx].methodName]();
    } else {
      el[ctx].bindingFn && el[ctx].bindingFn();
    }
  }
  

import Clickoutside from 'element-ui/src/utils/clickoutside';
directives: { Clickoutside },

v-clickoutside="close"

resize-event

import { addResizeListener, removeResizeListener } from 'element-ui/src/utils/resize-event';

mounted() {
    this.updateItems();
    this.$nextTick(() => {
      addResizeListener(this.$el, this.resetItemPosition);
      if (this.initialIndex < this.items.length && this.initialIndex >= 0) {
        this.activeIndex = this.initialIndex;
      }
      this.startTimer();
    });
  },

  beforeDestroy() {
    if (this.$el) removeResizeListener(this.$el, this.resetItemPosition);
    this.pauseTimer();
  }