• eloquent javascript: a modern introduction to programming, 3rd edition (also available for free on the author's website)
• javascript and jquery: interactive front-end web development
• you don't know js: up & going

bookmarklet to copy address of playlist.m3u8 frtom canvas which you can then pass to mpv

javascript:navigator.clipboard.writetext("https://streaming-lectures.la.utexas.edu/lo/smil:engage-player_"+window.location.pathname.substring(1+window.location.pathname.lastindexof("/"))+"_presenter.smil/playlist.m3u8")

• why ['1', '7', '11'].map(parseint) returns [1, nan, 3] in javascript