vue clickoutside

vue：解决点击元素之外的地方隐藏该元素

解决方案两个  1：将该div覆盖全屏，给div绑定方法。隐藏

　　　　　　  2：elementui   clickoutside.js   

　　　　　　　　大至思路   dom监听mouseup  跟  mousedown   目标元素于所有比较。

代码部分：

　　

//dom.js

import Vue from 'vue'
const isServer = Vue.prototype.$isServer;
export const on = (function() {
    if (!isServer && document.addEventListener) {
        return function(element, event, handler) {
        if (element && event && handler) {
            element.addEventListener(event, handler, false);
        }
        };
    } else {
        return function(element, event, handler) {
        if (element && event && handler) {
            element.attachEvent('on' + event, handler);
        }
        };
    }
})();

//clickoutside.js
import Vue from 'vue';
import { on } from './dom';

const nodeList = [];
const ctx = '@@clickoutsideContext';

let startClick;
let seed = 0;

!Vue.prototype.$isServer && on(document, 'mousedown', e => (startClick = e));

!Vue.prototype.$isServer && on(document, 'mouseup', e => {
  nodeList.forEach(node => node[ctx].documentHandler(e, startClick));
});

function createDocumentHandler(el, binding, vnode) {
  return function(mouseup = {}, mousedown = {}) {
    if (!vnode ||
      !vnode.context ||
      !mouseup.target ||
      !mousedown.target ||
      el.contains(mouseup.target) ||
      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();
    }
  };
}

/**
 * v-clickoutside
 * @desc 点击元素外面才会触发的事件
 * @example
 * ```vue
 * <div v-element-clickoutside="handleClose">
 * ```
 */
export default {
  bind(el, binding, vnode) {
    nodeList.push(el);
    const id = seed++;
    el[ctx] = {
      id,
      documentHandler: createDocumentHandler(el, binding, vnode),
      methodName: binding.expression,
      bindingFn: binding.value
    };
  },

  update(el, binding, vnode) {
    el[ctx].documentHandler = createDocumentHandler(el, binding, vnode);
    el[ctx].methodName = binding.expression;
    el[ctx].bindingFn = binding.value;
  },

  unbind(el) {
    let len = nodeList.length;

    for (let i = 0; i < len; i++) {
      if (nodeList[i][ctx].id === el[ctx].id) {
        nodeList.splice(i, 1);
        break;
      }
    }
    delete el[ctx];
  }
};

//main.js   自定义vue  指令
import clickOutside from './assets/js/clickoutside'
new Vue({
  el: '#app',
  router,
  components: { App },
  template: '<App/>'
})
Vue.directive('clickOutside', clickOutside)

//调用

 <div v-click-outside="hide" @click="toggle">Toggle</div>
 <div v-show="opened">Popup item</div>