Use this free, open HTML framework to create attractive presentations.

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Reveal.js is an open-source HTML presentation framework that allows users to create fully-featured and interactive presentations with CSS 3D transforms, nested slides, and more. It is responsive, supports interactive elements, has a simple user interface, and is open-source. Some popular alternatives to Reveal.js include Impress.js, Prezi, PhotoSwipe, Owl Carousel 2, FlexSlider, Keynote, and Haiku Deck. To create vertical slides in Reveal.js, simply nest sections within a section.

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Useful hints and guidelines for Reveal.js

Is it written in Typescript?
I think nowadays is a huge mistake to do something and not have it in Typescript.
The web development world got really complex and not having types defined can be a huge drawback in the maintenance and continuous development on tools.