How to use the ionicons/dist/loader.defineCustomElements function in ionicons

import './scripts/sliderJumpTo.js';
import './scripts/modalNotes.js';
import './scripts/modalRemoteControl.js';
import './scripts/remoteControl.js';
import './scripts/actions.js';
import './scripts/menu.js';
import './scripts/history.js';
import './scripts/fullscreen.js';
import './scripts/resize.js';
import './scripts/actionPlayPause.js';

import { defineCustomElements as ionicElements } from '@ionic/core/loader';
ionicElements(window);

import { defineCustomElements as ioniconsElements } from 'ionicons/dist/loader';
ioniconsElements(window);

// Init DeckDeckGo elements
import { defineCustomElements as deckDeckGoElements } from '@deckdeckgo/core/dist/loader';

import {defineCustomElements as deckDeckGoSlideTitleElements } from '@deckdeckgo/slide-title/dist/loader';
import {defineCustomElements as deckDeckGoSlideContentElements } from '@deckdeckgo/slide-content/dist/loader';
import {defineCustomElements as deckDeckGoSlideAuthorElements } from '@deckdeckgo/slide-author/dist/loader';
import {defineCustomElements as deckDeckGoSlideChartElements } from '@deckdeckgo/slide-chart/dist/loader';
import {defineCustomElements as deckDeckGoSlideYoutubeElements } from '@deckdeckgo/slide-youtube/dist/loader';
import {defineCustomElements as deckDeckGoSlideSplitElements } from '@deckdeckgo/slide-split/dist/loader';
import {defineCustomElements as deckDeckGoSlideCodeElements } from '@deckdeckgo/slide-code/dist/loader';
import {defineCustomElements as deckDeckGoSlideCountdownElements } from '@deckdeckgo/slide-countdown/dist/loader';
import {defineCustomElements as deckDeckGoSlideGifElements } from '@deckdeckgo/slide-gif/dist/loader';
import {defineCustomElements as deckDeckGoSlideQRCodeElements } from '@deckdeckgo/slide-qrcode/dist/loader';
import {defineCustomElements as deckDeckGoSlideBigImgElements } from '@deckdeckgo/slide-big-img/dist/loader';
import {defineCustomElements as deckDeckGoSlideVideoElements } from '@deckdeckgo/slide-video/dist/loader';