which technology is required to make a 3d animated website.

Question

the website which contains various effects like content will be visible with scrolling ,there will be a animation effect while loading, and 3D effect etc .

Answer 1

You can do pretty amazing stuff with a little CSS.
https://polypane.app/css-3d-transform-examples/

Answer 2

One of the best ways of 3d animation known to me is three.js:

https://code.sololearn.com/WD2JMrdSTGDN/?ref=app