API's with codesandox demo

[devjsonstringify]

Hi @NaotoshiFujita ,

I fell in love with splidejs I like how documentation was presented so neat and straightforward.
However as developer and learner I would love and hopefully to see demo / code sandbox on API's documentation on splidejs .

As a visual learner I learned fast when I see things visually particularly seeing those API's with real example and implementation.
For instance these libraries react-table and beta.reactjs.org has demo / code sandbox implementation which is great for learners perspective.