Immutable.js

Raised as a usability problem by 5 people on Hacker News over 12 years (2014–2025), in 4 threads.

People raised many different problems with Immutable.js, but no single problem has yet been raised by 3 people in 3 different months and threads.

Unreviewed issues were grouped by machine: Claude Haiku labelled each comment as a usability complaint, named what it's about and summed up the problem in a line, and a small model grouped similar problems. Nobody has checked them by hand. Expect mistakes.

The newest 4 complaints

Accidental plain assignments silently fail to update, forcing a non-native API2025-11-18
Can't simply hover to inspect data at breakpoints; must run REPL steps to see contents2015-10-05
TypeScript typings accept invalid nested keys and property assignments that should fail to compile2014-11-01
Same method names for mutating and immutable versions cause confusion about semantics2014-10-31