I have a question about the event on the web.

Hello.

If you look at the link below, I want to give you the effect of following the post a little later than scrolling.

http://taotajima.jp/works/

I don't know if it's JavaScript.If you have a similar library like this, please recommend it.

Or was it done using webgl?I'd like to know how to use the three.js library in more detail.

Or maybe it's greensock.

I want to know how to use this effect in detail.

How can we make this effect?