@a11d/bidirectional-map

A Map implementation that maintains a bidirectional relationship between keys and values, allowing lookups in both directions.

import '@a11d/bidirectional-map'

const map = new BidirectionalMap([
	['en', 'English'],
	['fr', 'French'],
])

map.get('en') // 'English'
map.getKey('English') // 'en'

Installation

npm install @a11d/bidirectional-map

API

Implements the standard Map<K, V> interface with additional methods:

const map = new BidirectionalMap([['en', 'English'], ['fr', 'French']])
map.getKey('English') // 'en'
map.getKey('Spanish') // undefined

const map = new BidirectionalMap([['en', 'English']])
map.hasValue('English') // true
map.hasValue('French') // false

const map = new BidirectionalMap([['en', 'English']])
map.deleteValue('English') // true
map.has('en') // false

Global Type

The package automatically registers itself globally, so TypeScript recognizes BidirectionalMap without explicit imports:

// Type is available globally
const map: BidirectionalMap<string, number> = new BidirectionalMap()