BitcoinJS

Requires additional tooling like browserify and careful dependency management for ECC libraries, especially for Taproot, which can be slow or incompatible in some browsers.

Key management features (e.g., ECPair, bip32) are split into separate libraries, increasing bundle size and setup complexity for basic functionality.

Admits vulnerabilities from JavaScript quirks, such as Buffer issues or poor RNG, forcing developers to audit dependencies and test thoroughly to prevent fund loss.

Primarily offers integration test examples rather than guided tutorials, which may leave beginners struggling to implement common use cases without deep digging.