29 packages found
Types and implementations whose APIs are inspired by Rust's `Option<T>` and `Result<T, E>`.
Elegant and battle-tested validation library for type-safe input data (for TypeScript and Flow)
TypeScript maybe monad for reaching child fields inside complicated objects.
Nullable. Optional. The Maybe monad. Whatever you want to call it, it's for Javascript now.
A stateless implementation of the maybe monad
plain implementation of Maybe (Optional, Nullable) monad
Optional implementation in Typescript
Check if a value is property accessible
An implementation for the nullable design pattern in javascript
not nil map - Map a function over nullable value
TypeScript utility types
A TypeScript Nullable<T> Type and Monad Compliant Utility Functions
Optionals for JS
Tri-state logic for javascript
Pure functional utilities for nullable types
Just function to predicate non nullable with type guard.
- check
- is
- non-nullable
- nonnullable
- null
- undefined
- nullable
- present
- blank
- typescript
- type-guard
- filter
- type
- narrowing
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Common types and functions for perfective development in TypeScript
- es6
- es2015
- typescript
- array
- error
- exception
- panic
- error chaining
- fp
- functional programming
- predicate
- type guard
- pattern matching
- option type
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Create null safe property accessible Object library for JavaScript
@IsNullable validator for class-validator