Lodash source is available as a monolithic build or modules so you can take your pick. Lodash has plenty of comments (jsdoc, bug fix notes, and implementation

Lodash source is available as a monolithic build or modules so you can take your pick. Lodash has plenty of comments (jsdoc, bug fix notes, and implementation explanations). Underscore has stripped many of these leading to devs making the same mistakes or introducing regressions. Lodash docs are arranged in alphabetic order. Underscore docs aren't and even have thing miscategorized.