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> Moment.js with the same modern API Moment.js objects are mutable [0], and this library's objects are ... immutable. [0] https://momentjs.com/guides/#/lib-co

• moogly 4y ago
  The mutability in Moment.js is not really a feature though, just a massive inconvenience/source of bugs (unless you use `.clone()` all over the place). But yeah, very important difference.
• miohtama 4y ago
  Mutability cannot be enabled thru plugin: https://day.js.org/docs/en/plugin/bad-mutable https://day.js.org/docs/en/plugin/bad-mutable However it is discouraged as mutable dates often lead to less maintainable, harder to debug, code.
• brundolf 4y ago
  It's not quite exactly the same API - you'll need to do some testing afterward - but if you're using Moment idiomatically, nearly everything should just-work