[ducttapecrown]

Wow. This is a beautifully lightweight browser textbook. It has essentially everything I'd expect. Good math typesetting, customizable margin and font with simple javascript (I'm guessing I didn't check).

Envisioning a responsive open source browser textbook is pretty easy, I'm glad someone with cachet like Caltech is providing a role model. Hopefully every important textbook will eventually be as accessible as this one is.

[criddell]

I think I'd still prefer a pdf. Doesn't require an internet connection and I can highlight, sketch, and scribble in the margins.

[vincentmarle]

I think I found a PDF version: https://antilogicalism.com/wp-content/uploads/2018/04/feynma...

[dylan604]

My only dislike is the 100% width, but that's just a modern styling preference.

[wintermutestwin]

As someone who zooms in on 80% of websites, <100% width is infuriating.