sweetalert2/src/enhancers/withNoNewKeyword.js

A beautiful, responsive, customizable and accessible (WAI-ARIA) replacement for JavaScript's popup boxes, supported fork of sweetalert

/**
 * Extends a Swal class making it able to be instantiated without the `new` keyword (and thus without `Swal.fire`)
 * @param ParentSwal
 * @returns {NoNewKeywordSwal}
 */
export function withNoNewKeyword (ParentSwal) {
  const NoNewKeywordSwal = function (...args) {
    if (!(this instanceof NoNewKeywordSwal)) {
      return new NoNewKeywordSwal(...args)
    }
    Object.getPrototypeOf(NoNewKeywordSwal).apply(this, args)
  }
  NoNewKeywordSwal.prototype = Object.assign(
    Object.create(ParentSwal.prototype),
    { constructor: NoNewKeywordSwal }
  )

  if (typeof Object.setPrototypeOf === 'function') {
    Object.setPrototypeOf(NoNewKeywordSwal, ParentSwal)
  } else {
    // Android 4.4
    // eslint-disable-next-line
    NoNewKeywordSwal.__proto__ = ParentSwal
  }
  return NoNewKeywordSwal
}