https://www.joshmorony.com/building-a-notepad-application-from-scratch-with-ionic/
Building a Notepad Application from Scratch with Ionic
BY JOSH MORONY | LAST UPDATED: OCTOBER 03, 2018
→Ionic4でTodoアプリを作ります。

https://www.joshmorony.com/an-introduction-to-http-requests-fetching-data-in-ionic/
An Introduction to HTTP Requests & Fetching Data in Ionic
BY JOSH MORONY | LAST UPDATED: OCTOBER 25, 2018
→IonicでのHTTP通信、HttpClientModuleの使い方について分かりやすく説明されています。

https://www.freakyjolly.com/ionic-4-add-image-viewer-for-photos-in-assets-folder-in-application-package/
Ionic 4 | Implement Image Viewer for Photos in Assets folder
→画像などは、assets/images/ フォルダに入れるようです。

目次：スマホ用ホームページ&スマホアプリ作成ソフトIonic4