react-bootstrap-typeahead/es/utils/addCustomOption.js

import getOptionLabel from './getOptionLabel';
import { isFunction } from './nodash';

function addCustomOption(results, props) {
  var allowNew = props.allowNew,
      labelKey = props.labelKey,
      text = props.text;

  if (!allowNew || !text.trim()) {
    return false;
  } // If the consumer has provided a callback, use that to determine whether or
  // not to add the custom option.


  if (isFunction(allowNew)) {
    return allowNew(results, props);
  } // By default, don't add the custom option if there is an exact text match
  // with an existing option.


  return !results.some(function (o) {
    return getOptionLabel(o, labelKey) === text;
  });
}

export default addCustomOption;