twig-drupal-filters/filters/without.js

Drupal's Twig filters, implemented for Twig.js

const objectKeys = require('object-keys')

/**
 * Removes child elements from a copy of the original array.
 *
 * Creates a copy of the renderable array and removes child elements by key
 * specified through filter's arguments. The copy can be printed without these
 * elements. The original renderable array is still available and can be used
 * to print child elements in their entirety in the twig template.
 *
 * @param {Array|Object} element
 *   The parent renderable array to exclude the child items.
 * @param {...string} ...
 *   The string keys of element to prevent printing.
 *
 * @return {Object}
 *   The filtered renderable array.
 */
module.exports = function (element) {
  let filteredElement = {}

  if (!element) {
    return []
  }

  let args = Array.prototype.slice.call(arguments, 1)
  if (args[0]) {
    for (let name of objectKeys(element)) {
      if (!args[0].includes(name)) {
        filteredElement[name] = element[name]
      }
    }
  }

  return filteredElement
}