Source of LazyLoad

* Intersection Observer API [#q5ac6296]

- Intersection Observer API
--   https://developer.mozilla.org/en-US/docs/Web/API/Intersection_Observer_API


* Lazy Load Remastered [#qdcd83c5]

 $ yarn add lazyload
 $ npm install lazyload

- Lazy Load Remastered
-- https://appelsiini.net/projects/lazyload/

* aFarkas / lazysizes [#r8fa831d]

- lazysizes
--  https://github.com/aFarkas/lazysizes

- How Lazy Loading can Optimize Your Shopify Theme Images
--  https://www.shopify.com/partners/blog/lazy-loading
---   意訳・まとめ https://qiita.com/yokoto/items/a1b82f6c8313f89a751b

* Lazy Load Plugin for jQuery [#mb87fd7b]

- Lazy Load(画像の遅延読み込み)を実装する方法
-- https://syncer.jp/how-to-setting-lazy-load-images