bootstrap-vue/esm/components/nav/nav-item-dropdown.js

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import Vue from '../../utils/vue';
import { props as BDropdownProps } from '../dropdown/dropdown';
import idMixin from '../../mixins/id';
import dropdownMixin from '../../mixins/dropdown';
import normalizeSlotMixin from '../../mixins/normalize-slot';
import pluckProps from '../../utils/pluck-props';
import { htmlOrText } from '../../utils/html';
import { BLink } from '../link/link'; // -- Constants --

export var props = pluckProps(['menuClass', 'toggleClass', 'noCaret', 'role'], BDropdownProps); // @vue/component

export var BNavItemDropdown =
/*#__PURE__*/
Vue.extend({
  name: 'BNavItemDropdown',
  mixins: [idMixin, dropdownMixin, normalizeSlotMixin],
  props: props,
  computed: {
    isNav: function isNav() {
      // Signal to dropdown mixin that we are in a navbar
      return true;
    },
    dropdownClasses: function dropdownClasses() {
      return [this.directionClass, {
        show: this.visible
      }];
    },
    menuClasses: function menuClasses() {
      return [this.menuClass, {
        'dropdown-menu-right': this.right,
        show: this.visible
      }];
    },
    toggleClasses: function toggleClasses() {
      return [this.toggleClass, {
        'dropdown-toggle-no-caret': this.noCaret
      }];
    }
  },
  render: function render(h) {
    var button = h(BLink, {
      ref: 'toggle',
      staticClass: 'nav-link dropdown-toggle',
      class: this.toggleClasses,
      props: {
        href: '#',
        disabled: this.disabled
      },
      attrs: {
        id: this.safeId('_BV_button_'),
        'aria-haspopup': 'true',
        'aria-expanded': this.visible ? 'true' : 'false'
      },
      on: {
        mousedown: this.onMousedown,
        click: this.toggle,
        keydown: this.toggle // Handle ENTER, SPACE and DOWN

      }
    }, [this.$slots['button-content'] || this.$slots.text || h('span', {
      domProps: htmlOrText(this.html, this.text)
    })]);
    var menu = h('ul', {
      staticClass: 'dropdown-menu',
      class: this.menuClasses,
      ref: 'menu',
      attrs: {
        tabindex: '-1',
        'aria-labelledby': this.safeId('_BV_button_')
      },
      on: {
        keydown: this.onKeydown // Handle UP, DOWN and ESC

      }
    }, !this.lazy || this.visible ? this.normalizeSlot('default', {
      hide: this.hide
    }) : [h()]);
    return h('li', {
      staticClass: 'nav-item b-nav-dropdown dropdown',
      class: this.dropdownClasses,
      attrs: {
        id: this.safeId()
      }
    }, [button, menu]);
  }
});