[Guide] Carousel / Calendar / Modal / Drag & Drop

## 1. Carousel
[w3schools 1](https://www.w3schools.com/bootstrap/tryit.asp?filename=trybs_ref_js_carousel2&stacked=h)
[w3schools 2](https://www.w3schools.com/howto/tryit.asp?filename=tryhow_js_slideshow)
[codepen 1](https://codepen.io/lloydsibson/pen/zQdpBz)

## 2. Modal
[codepen 1](https://codepen.io/deammer/pen/LoMBvp)

## 3. Calendar
[codepen 1](https://codepen.io/RicardoBarbosa/pen/kXzRbw)
[codepen 2](https://codepen.io/razwanizmi/pen/pxmjMg)

## 4. Draggable div element
[youtube vid](https://www.youtube.com/watch?v=jpEMUCthrDo)
[D&D blog](https://androphil.tistory.com/646?category=610258)