# All files / src/dom selector-engine.js

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100% Branches 11/11
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     /**
     * --------------------------------------------------------------------------
     * Bootstrap (v5.0.0-alpha1): dom/selector-engine.js
     * Licensed under MIT (https://github.com/twbs/bootstrap/blob/master/LICENSE)
     * --------------------------------------------------------------------------
     */

    import { find as findFn, findOne } from './polyfill'

    /**
     * ------------------------------------------------------------------------
     * Constants
     * ------------------------------------------------------------------------
     */

    const NODE_TEXT = 3

    const SelectorEngine = {
      matches(element, selector) {
        return element.matches(selector)
      },

      find(selector, element = document.documentElement) {
        return [].concat(...findFn.call(element, selector))
      },

      findOne(selector, element = document.documentElement) {
        return findOne.call(element, selector)
      },

      children(element, selector) {
        const children = [].concat(...element.children)

        return children.filter(child => child.matches(selector))
      },

      parents(element, selector) {
        const parents = []

        let ancestor = element.parentNode

        while (ancestor && ancestor.nodeType === Node.ELEMENT_NODE && ancestor.nodeType !== NODE_TEXT) {
          if (this.matches(ancestor, selector)) {
            parents.push(ancestor)
          }

          ancestor = ancestor.parentNode
        }

        return parents
      },

      prev(element, selector) {
        let previous = element.previousElementSibling

        while (previous) {
          if (previous.matches(selector)) {
            return [previous]
          }

          previous = previous.previousElementSibling
        }

        return []
      },

      next(element, selector) {
        let next = element.nextElementSibling

        while (next) {
          if (this.matches(next, selector)) {
            return [next]
          }

          next = next.nextElementSibling
        }

        return []
      }
    }

    export default SelectorEngine