flap

🐓 Guard clauses for JS

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Summary

flap allows you to cleanly enforce integrity conditions and modifications to the inputs and outputs of functions.

You can also think of it as a generic datal-flow wrapper for functions, with a dash of pattern-matching awesomeness.

Features

• Wraps JS functions and their arguments with guard clauses found in languages such as Elixir and Haskell
• Elegantly modifies and reacts to arguments based on expressions
• Pattern matching against object arguments
• Improves readability of complex conditions by chaining discrete units of logic
• Helps prevent deep nesting and callback hell
• Optionally bind to Function.prototype for maximum sugar

Installation

npm i flap

Documentation

You can find detailed documentation and examples at https://flap.js.org.

Contributing

Contributions are always welcome! Simply open a PR with completely covered tests.

npm run coverage

License

MIT