API Reference

41 APIs across 11 namespaces. All functions are pure, deterministic, and zero-dependency.

country

API	Summary	Tags
country	Look up a country by any identifier format (alpha-2, alpha-3, numeric, or English name) and return a rich ISO 3166-1 / CLDR 48 Country object.	countryiso-3166cldr

datetime

API	Summary	Tags
datetime.delta	Compute the time difference between two timestamps in milliseconds or seconds per ISO 8601.	datetimetime-differenceduration
datetime.toISO	Format a Date or millisecond timestamp to a UTC ISO 8601 string with configurable precision.	datetimeiso8601formatting

equal

API	Summary	Tags
equal.bool	Boolean equality per ECMA-262 ToBoolean semantics with normalization of diverse boolean representations (true/false, 0/1, strings).	equalitybooleannormalization
equal.literal	Equality comparison per ECMA-262 strict equality with string trimming (E-01) and no type coercion.	equalitycomparisontrimming
equal.numeric	Numeric equality per ECMA-262 Number coercion, rejecting hex/binary/octal notation for safety.	equalitynumericcomparison

format

API	Summary	Tags
format.creditCard	Format a credit card number with brand-aware digit grouping per ISO/IEC 7812 BIN prefix detection.	formatcredit-cardpayment
format.digits	Format a digit string according to a pattern where '#' represents a digit slot, per ECMA-262 String processing.	formatdigitspattern
format.iban	Format an IBAN (International Bank Account Number) in groups of 4 per ISO 13616.	formatibanbanking
format.phone	Format a phone number for human-readable display with country-specific grouping, per ITU-T E.164 and RFC 3966.	formatphonee164

http.etag

API	Summary	Tags
http.etag.formatETag	Format an ETag object to its RFC 9110 §8.8.3 HTTP header string representation.	httpetagformatting
http.etag.formatIfNoneMatch	Format an IfNoneMatch object to its RFC 9110 §13.1.2 HTTP header string.	httpetagformatting
http.etag.matchesIfNoneMatch	Check if a current ETag matches an If-None-Match header value using weak comparison per RFC 9110 §13.1.2.	httpetag304
http.etag.parseETag	Parse a single ETag header value into a structured { weak, value } object per RFC 9110 §8.8.3.	httpetagcaching
http.etag.parseIfNoneMatch	Parse an If-None-Match header value into a structured IfNoneMatch object per RFC 9110 §13.1.2.	httpetagif-none-match
http.etag.strongEqual	Strong ETag comparison: both must be strong (weak === false) and values must match per RFC 9110 §8.8.3.2.	httpetagcomparison
http.etag.weakEqual	Weak ETag comparison: compares opaque-tag values ignoring the weak/strong flag per RFC 9110 §8.8.3.2.	httpetagcomparison

locale

API	Summary	Tags
locale.canonicalize	Canonicalize a BCP 47 locale tag to a stable string representation.	localenormalizationbcp47
locale.equal	Compare two BCP 47 locale tags for equality per RFC 5646 §2.1.1 case-insensitivity rules.	localecomparisonbcp47

money

API	Summary	Tags
money.add	Add two Money values with same-currency and same-scale enforcement per ISO 4217.	moneyarithmeticbigint
money.format	Format an ISO 4217 Money object to its string representation using string-based division for exact output.	moneyformattingbigint
money.parse	Parse a monetary string into a bigint-based Money object with ISO 4217 currency awareness.	moneyparsingbigint
money.sub	Subtract two Money values with same-currency and same-scale enforcement per ISO 4217.	moneyarithmeticbigint

qty

API	Summary	Tags
qty.add	Add two Quantity values with same-unit enforcement (case-sensitive comparison).	quantityarithmeticaddition
qty.parse	Parse a UCUM-compatible quantity string into a { value, unit } object using greedy numeric prefix extraction.	quantityparsingmeasurement
qty.sub	Subtract two Quantity values with same-unit enforcement (case-sensitive comparison).	quantityarithmeticsubtraction

query

API	Summary	Tags
query.canonicalParams	Produce a canonical query string sorted by key then by value for deterministic output per RFC 3986.	query-stringcanonicalsorting
query.parse	Parse a URL query string into a key-value record, handling both WHATWG (+) and RFC 3986 (%20) space encoding.	query-stringparsingurl
query.stringify	Serialize an object into a URL query string with configurable encoding (WHATWG or RFC 3986) and array mode.	query-stringserializationurl

redact

API	Summary	Tags
redact.creditCard	Redact a credit card number by masking all digits except the last 4, preserving separators, per PCI DSS Requirement 3.4.	redactcredit-cardpci-dss
redact.email	Redact an RFC 5321 email address by masking the local part while preserving the domain, per GDPR data minimization principles.	redactemailpii
redact.ipAddress	Redact an IP address per RFC 6235 by masking the host portion, consistent with GDPR /24 (IPv4) and /48 (IPv6) truncation practice.	redactipipv4
redact.matchFieldType	Detect a PCI/GDPR-relevant PII field type from a field name using exact-match lookup against a built-in name map.	redactfield-detectionpii
redact.phone	Redact a phone number using ITU-T E.164 structure awareness, preserving country code and last 4 subscriber digits.	redactphonepii
redact.redactObject	Redact specified fields in an object by dot-path, applying PCI/GDPR-compliant strategy-aware PII masking with structural sharing.	redactobjectpii
redact.token	Redact a token or API key with configurable head/tail preservation, per PCI DSS data security principles.	redacttokenapi-key

url

API	Summary	Tags
url.isAbsolute	Check whether a URL string is absolute (has a scheme:// prefix) per RFC 3986 §3.1.	urlvalidationscheme
url.join	Join URL path segments with path-join semantics and optional query parameter merging per RFC 3986.	urlpath-joinquery-string
url.normalize	Normalize a URL string via the WHATWG URL parser for spec-compliant canonicalization.	urlnormalizationwhatwg
url.stripQuery	Remove the RFC 3986 query string and fragment from a URL, returning only the path portion.	urlquery-stringstrip
url.withQuery	Set or merge query parameters on a URL string with three merge strategies per RFC 3986 §3.4.	urlquery-stringmerge