bootstrap-vue/src/components/breadcrumb/breadcrumb.js

BootstrapVue, with over 40 plugins and more than 80 custom components, custom directives, and over 300 icons, provides one of the most comprehensive implementations of Bootstrap v4 components and grid system for Vue.js. With extensive and automated WAI-AR

import Vue from '../../utils/vue'
import { mergeData } from 'vue-functional-data-merge'
import { isArray, isObject } from '../../utils/inspect'
import { toString } from '../../utils/string'
import { BBreadcrumbItem } from './breadcrumb-item'

export const props = {
  items: {
    type: Array,
    default: null
  }
}

// @vue/component
export const BBreadcrumb = /*#__PURE__*/ Vue.extend({
  name: 'BBreadcrumb',
  functional: true,
  props,
  render(h, { props, data, children }) {
    let childNodes = children
    // Build child nodes from items if given.
    if (isArray(props.items)) {
      let activeDefined = false
      childNodes = props.items.map((item, idx) => {
        if (!isObject(item)) {
          item = { text: toString(item) }
        }
        // Copy the value here so we can normalize it.
        let active = item.active
        if (active) {
          activeDefined = true
        }
        if (!active && !activeDefined) {
          // Auto-detect active by position in list.
          active = idx + 1 === props.items.length
        }

        return h(BBreadcrumbItem, { props: { ...item, active } })
      })
    }

    return h('ol', mergeData(data, { staticClass: 'breadcrumb' }), childNodes)
  }
})