js-essential-kit
This library provides a comprehensive set of utility functions for various common tasks, including date calculations, formatting, masking, normalizing data, and validation
viacep-autofill
Drop-in helper para auto-preencher endereço via ViaCEP (Global e ES Module) com estados/erros, validateOnBlur, AbortController, timeout/retry/backoff, fallback, cache TTL, escopo por form, UF <select> e transformers.