bootstrap-vue/src/utils/normalize-slot.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 { isFunction } from './inspect'

// Note for functional components:
// In functional components, `slots` is a function so it must be called
// first before passing to the below methods. `scopedSlots` is always an
// object and may be undefined (for Vue < 2.6.x)

/**
 * Returns true if either scoped or unscoped named slot eists
 *
 * @param {String} name
 * @param {Object} scopedSlots
 * @param {Object} slots
 * @returns {Array|undefined} vNodes
 */
const hasNormalizedSlot = (name, $scopedSlots = {}, $slots = {}) => {
  // Returns true if the either a $scopedSlot or $slot exists with the specified name
  return Boolean($scopedSlots[name] || $slots[name])
}

/**
 * Returns vNodes for named slot either scoped or unscoped
 *
 * @param {String} name
 * @param {String} scope
 * @param {Object} scopedSlots
 * @param {Object} slots
 * @returns {Array|undefined} vNodes
 */
const normalizeSlot = (name, scope = {}, $scopedSlots = {}, $slots = {}) => {
  // Note: in Vue 2.6.x, all names slots are also scoped slots
  const slot = $scopedSlots[name] || $slots[name]
  return isFunction(slot) ? slot(scope) : slot
}

// Named exports
export { hasNormalizedSlot, normalizeSlot }

// Default export (backwards compatability)
export default normalizeSlot