CodeMirror does it on the web since version 2, somewhen in 2011. http://marijnhaverbeke.nl/blog/a-pathological-scrolling-model.html http://marijnhaverbeke.nl/b

CodeMirror does it on the web since version 2, somewhen in 2011. http://marijnhaverbeke.nl/blog/a-pathological-scrolling-model.html http://marijnhaverbeke.nl/blog/a-pathological-scrolling-mode... is the most recent explanation. I'd be surprised if there weren't earlier implementations of the idea.