web-base--/element-demo/src/store/modules/app.js

import Cookies from 'js-cookie'

export default {
  state: {
    sidebar: {
      opened: Cookies.get('sidebarStatus') ? !!+Cookies.get('sidebarStatus') : true,
      withoutAnimation: false
    },
    device: 'desktop'
  },

  toggleSideBar: function() {
    this.state.sidebar.opened = !this.state.sidebar.opened
    this.state.sidebar.withoutAnimation = false
    if (this.state.sidebar.opened) {
      Cookies.set('sidebarStatus', 1)
    } else {
      Cookies.set('sidebarStatus', 0)
    }
  },
  closeSideBar: function({ withoutAnimation }) {
    Cookies.set('sidebarStatus', 0)
    this.state.sidebar.opened = false
    this.state.sidebar.withoutAnimation = withoutAnimation
  },

  toggleDevice: function(device) {
    this.state.device = device
  }
}