版本：1.0.0
- https://cdn.bootcdn.net/ajax/libs/vanilla-lazyload/1.0.0/lazyload.js
- https://cdn.bootcdn.net/ajax/libs/vanilla-lazyload/1.0.0/lazyload.min.js
LazyLoad is a fast, lightweight and flexible script for loading images only when they're about to enter the viewport of a scrollable area, with an excellent support to the progressive JPEG image format. Typescript module definition is available.