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

BootstrapVue, with over 40 plugins and more than 75 custom components, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-ARIA accessibility markup.

import Vue from '../../utils/vue';
import { stripTags } from '../../utils/html';
import { getComponentConfig } from '../../utils/config';
import { HTMLElement } from '../../utils/safe-types';
import idMixin from '../../mixins/id';
import dropdownMixin from '../../mixins/dropdown';
import normalizeSlotMixin from '../../mixins/normalize-slot';
import { BButton } from '../button/button';
var NAME = 'BDropdown';
export var props = {
  toggleText: {
    // This really should be toggleLabel
    type: String,
    default: function _default() {
      return getComponentConfig(NAME, 'toggleText');
    }
  },
  size: {
    type: String,
    default: null
  },
  variant: {
    type: String,
    default: function _default() {
      return getComponentConfig(NAME, 'variant');
    }
  },
  menuClass: {
    type: [String, Array],
    default: null
  },
  toggleTag: {
    type: String,
    default: 'button'
  },
  toggleClass: {
    type: [String, Array],
    default: null
  },
  noCaret: {
    type: Boolean,
    default: false
  },
  split: {
    type: Boolean,
    default: false
  },
  splitHref: {
    type: String // default: undefined

  },
  splitTo: {
    type: [String, Object] // default: undefined

  },
  splitVariant: {
    type: String,
    default: function _default() {
      return getComponentConfig(NAME, 'splitVariant');
    }
  },
  role: {
    type: String,
    default: 'menu'
  },
  boundary: {
    // String: `scrollParent`, `window` or `viewport`
    // HTMLElement: HTML Element reference
    type: [String, HTMLElement],
    default: 'scrollParent'
  } // @vue/component

};
export var BDropdown =
/*#__PURE__*/
Vue.extend({
  name: NAME,
  mixins: [idMixin, dropdownMixin, normalizeSlotMixin],
  props: props,
  computed: {
    dropdownClasses: function dropdownClasses() {
      return [this.directionClass, {
        show: this.visible,
        // Position `static` is needed to allow menu to "breakout" of the scrollParent boundaries
        // when boundary is anything other than `scrollParent`
        // See https://github.com/twbs/bootstrap/issues/24251#issuecomment-341413786
        'position-static': this.boundary !== 'scrollParent' || !this.boundary
      }];
    },
    menuClasses: function menuClasses() {
      return [this.menuClass, {
        'dropdown-menu-right': this.right,
        show: this.visible
      }];
    },
    toggleClasses: function toggleClasses() {
      return [this.toggleClass, {
        'dropdown-toggle-split': this.split,
        'dropdown-toggle-no-caret': this.noCaret && !this.split
      }];
    }
  },
  render: function render(h) {
    var split = h(false);
    var buttonContent = this.normalizeSlot('button-content') || this.normalizeSlot('text') || this.html || stripTags(this.text);

    if (this.split) {
      var btnProps = {
        disabled: this.disabled,
        variant: this.splitVariant || this.variant,
        size: this.size // We add these as needed due to router-link issues with defined property with undefined/null values

      };

      if (this.splitTo) {
        btnProps.to = this.splitTo;
      }

      if (this.splitHref) {
        btnProps.href = this.splitHref;
      }

      split = h(BButton, {
        ref: 'button',
        props: btnProps,
        attrs: {
          id: this.safeId('_BV_button_')
        },
        on: {
          click: this.click
        }
      }, [buttonContent]);
    }

    var toggle = h(BButton, {
      ref: 'toggle',
      staticClass: 'dropdown-toggle',
      class: this.toggleClasses,
      props: {
        variant: this.variant,
        size: this.size,
        disabled: this.disabled,
        tag: this.toggleTag
      },
      attrs: {
        id: this.safeId('_BV_toggle_'),
        'aria-haspopup': 'true',
        'aria-expanded': this.visible ? 'true' : 'false'
      },
      on: {
        click: this.toggle,
        // click
        keydown: this.toggle // enter, space, down

      }
    }, [this.split ? h('span', {
      class: ['sr-only']
    }, [this.toggleText]) : buttonContent]);
    var menu = h('ul', {
      ref: 'menu',
      staticClass: 'dropdown-menu',
      class: this.menuClasses,
      attrs: {
        role: this.role,
        tabindex: '-1',
        'aria-labelledby': this.safeId(this.split ? '_BV_button_' : '_BV_toggle_')
      },
      on: {
        keydown: this.onKeydown // up, down, esc

      }
    }, this.normalizeSlot('default', {
      hide: this.hide
    }));
    return h('div', {
      staticClass: 'dropdown btn-group b-dropdown',
      class: this.dropdownClasses,
      attrs: {
        id: this.safeId()
      }
    }, [split, toggle, menu]);
  }
});
export default BDropdown;