All Functions

All Functions

230 implemented helpers + 44 covered by native JavaScript APIs, sorted alphabetically.

Function	Category	Description
add / subtract (date arithmetic)	date	native JS Temporal.PlainDate.prototype.add(duration) / .subtract(duration) (Temporal (Stage 3))
addDays	date	Adds days to a date.
addMonths	date	Adds months to a date.
addYears	date	Adds years to a date.
analyzeCommits	commit	Analyses a list of commits to suggest a semantic version bump.
buildConventionalCommitRegex	commit	Builds a regular expression matching the subject line of a Conventional Commits message.
buildStatusTable	ci	Builds a Markdown table body from a map of job names to CI/CD statuses.
camelCase	string	Converts kebab-case to camelCase
capitalize	string	Capitalizes the first letter of a string.
cartesianProduct	array	Computes the Cartesian product of the provided arrays.
ceil / floor	number	native JS Math.ceil() / Math.floor() (ES1)
chunk	array	Chunks an array into smaller arrays of specified size
clamp	number	Clamps a number between min and max values
clampDate	date	Clamps a date to a [min, max] range.
cleanPath	url	Clean an URL by removing duplicate slashes.
combine	observable	Combine two observables with a map function and an optional pre-treatment.
combineLatest	observable	Combines multiple Observables to create an Observable whose values are calculated from the latest values of each of i…
compact	array	Removes all falsy values (false, null, undefined, 0, "", NaN) from an array.
compact	object	Removes all entries with falsy values (false, null, undefined, 0, "", NaN) from an object.
compare	date	Comparison of two dates.
compare	version	Compares two semantic version strings according to SemVer 2.0.0 specification Supports: - Core version: MAJOR.MINOR.…
compare (ordering)	date	native JS Temporal.PlainDate.compare(a, b) / Temporal.Instant.compare(a, b) (Temporal (Stage 3))
compose	function	Composes functions right-to-left: compose(f, g)(x) is equivalent to f(g(x)).
consoleLogPromise	promise	Returns a function that logs data to the console and passes it through.
correctFloat	number	Corrects floating-point arithmetic errors by rounding to a given number of significant digits.
countBy	array	Groups the elements of an array by the key returned by keyFn and returns a record mapping each key to the number of…
createSortByDateFn	array	Creates a sort function for objects by date property.
createSortByNaturalFn	array	Creates a sort function for objects by one or more string properties using natural ordering.
createSortByNumberFn	array	Creates a sort function for objects by number property.
createSortByStringFn	array	Creates a sort function for objects by one or more string properties.
curry	function	Transforms a multi-argument function into a chain of single-argument functions (Haskell-style currying).
dateToISOString	date	Formats a date to ISO string or returns null.
daysDifference	date	Gets the difference in days between two dates.
daysInMonth	date	Returns the number of days in the given month of the given year.
debounce	function	Creates a debounced function that delays invoking func until after delay milliseconds have elapsed since the last tim…
deepClone	object	Creates a deep copy of an object or array
deepMerge	object	Merges two or more objects deeply
DeepPartial	type	Recursively makes all properties of T optional, including nested objects and array elements.
DeepWritable	type	Recursively removes readonly from all properties of T, including nested objects, array elements, and tuple positions.
defer	promise	Runs an async function and guarantees that all deferred callbacks are executed afterwards, in LIFO order (last regist…
delay	promise	Creates a promise that resolves after specified delay
diff	object	Structural object diff.
difference	array	Returns the difference between two arrays (items in first array but not in second)
difference	date	Calculates the difference between two dates in the specified unit.
drop	array	native JS Array.prototype.slice(n) (ES3)
eachDay	date	Returns an array of Date objects for each day from start to end (inclusive).
eachMonth	date	Returns an array of Date objects for the first day of each month from start to end (inclusive).
endOf	date	Returns a new Date set to the end of the given unit.
ensureArray	array	Wraps a value in an array if it is not already one.
ensureDate	date	Safely converts a date-like value to a valid Date object, or returns null.
equalsDeep	array	Recursive structural array equality.
equalsDeep	object	Recursive structural object equality.
equalsShallow	array	Positional, one-level (shallow) array equality.
equalsShallow	object	One-level (shallow) object equality.
equalsUnordered	array	Order-independent (set-style) array equality.
escape	markdown	Escapes all Markdown special characters in a string so they render as literal text rather than formatting syntax.
escapeHtml	string	Escapes the HTML special characters &, <, >, ", and ' in a string.
extractErrorMessage	string	Convert an error to a readable message.
extractNumber	number	Extracts the first number embedded anywhere in a string, or passes through a number.
extractPureURI	url	Extracts the pure URI from a URL by removing query parameters and fragments.
falsyPromiseOrThrow	promise	Returns a function that passes through falsy data or throws an error.
find / findIndex	array	native JS Array.prototype.find() / findIndex() (ES2015)
flatten / flat	array	native JS Array.prototype.flat(depth?) (ES2019)
flip	function	Creates a function that invokes fn with the first two arguments swapped.
formatCompact	number	Formats a number using compact notation (e.g.
formatDuration	date	Formats a duration in milliseconds as a compact human-readable string.
formatInTimezone	date	Formats a date in a specific IANA timezone using Intl.DateTimeFormat.
formatSize	number	Format a byte count into a human-readable string with the appropriate unit.
from (parse temporal string)	date	native JS Temporal.Instant.from(str) / Temporal.PlainDate.from(str) / etc. (Temporal (Stage 3))
fromMillis	date	Creates a Date from a timestamp in milliseconds.
fromSeconds	date	Creates a Date from a timestamp in seconds.
get	object	Gets a value from an object using a dot-notated path
getTimezoneOffset	date	Returns the UTC offset in minutes for the given IANA timezone at a specific point in time.
groupBy	object	Groups an array of items by a key derived from each item.
groupBy / group	array	native JS Object.groupBy(arr, fn) (ES2024)
guard	promise	Wraps a function so that if it throws, a default value is returned instead of propagating the error.
has	object	native JS Object.hasOwn(obj, key) (ES2022)
head / first	array	native JS Array.prototype.at(0) (ES2022)
identity	function	Returns the given value unchanged Useful as a default transform, in function composition, or as a placeholder mapper.
includes	array	native JS Array.prototype.includes() (ES2016)
increment	version	Increments a semantic version
injectWordBreaks	string	Adds word-break opportunities to a string so it can wrap cleanly in narrow UI containers such as side panels or table…
inRange	number	Checks whether a number falls within [min, max] (both inclusive by default).
intersection	array	Compute the intersection of two arrays, meaning the elements that are present in both arrays.
intersects	array	Simple helper that check if two lists shared at least an item in common.
invert	object	Returns a new object with keys and values swapped.
isArray	type	Checks if a value is an array.
isArrayBuffer	type	Checks if a value is an ArrayBuffer instance.
isArrayLike	type	Checks if a value is array-like: has a non-negative integer length property.
isAsyncFunction	type	Checks if a value is an async function.
isAsyncGenerator	type	Checks if a value is an async generator object (the result of calling an async function*).
isAsyncGeneratorFunction	type	Checks if a value is an async generator function (an async function* declaration or expression).
isAsyncIterable	type	Checks if a value implements the async iterable protocol.
isBigInt	type	Checks if a value is a bigint.
isBlank	string	Checks if a string is blank — empty or contains only whitespace characters.
isBlob	type	Checks if a value is a Blob instance.
isBoolean	type	Checks if a value is a boolean.
isBuffer	node	Checks if a value is a Node.js Buffer instance.
isBusinessDay	date	Checks whether a date falls on a business day (i.e.
isConventionalCommit	commit	Checks whether a commit message’s subject line follows the Conventional Commits format constrained by the given options.
isDate	type	Checks if a value is a Date instance.
isDefined	type	Checks if a value is defined (not undefined nor null).
isDirectInstanceOf	type	native JS value.constructor === Foo (ES1)
isEmpty	array	Checks if an array is empty (has no elements).
isEmpty	object	Checks if a plain object has no own enumerable string-keyed properties.
isEmpty	string	Checks if a string is empty ("").
isEmpty	type	Checks if a value is empty.
isError	type	Checks if a value is an Error instance.
isEven	number	Checks if a value is an even integer.
isFalsy	type	Checks if a value is falsy (false, null, undefined, 0, "", NaN).
isFinite / isFiniteNumber	type	native JS Number.isFinite(value) (ES2015)
isFormData	type	Checks if a value is a FormData instance.
isFunction	type	Checks if a value is a function.
isGenerator	type	Checks if a value is a generator object (the result of calling a function*).
isGeneratorFunction	type	Checks if a value is a generator function (a function* declaration or expression).
isHtmlElement / isUrlInstance / isUrlSearchParams	type	native JS value instanceof HTMLElement / URL / URLSearchParams (Web API)
isInfinite	type	native JS value === Infinity || value === -Infinity / !Number.isFinite(value) && !Number.isNaN(value) (ES2015)
isInteger	type	native JS Number.isInteger(value) (ES2015)
isIterable	type	Checks if a value is iterable (has a Symbol.iterator method).
isLeapYear	date	Returns true if the given year is a leap year.
isMap	type	Checks if a value is a Map instance.
isNaN	type	native JS Number.isNaN(value) (ES2015)
isNegative	number	Checks if a value is a number less than 0.
isNodeStream	node	Checks if a value is a Node.js stream (has a .pipe() method).
isNonEmpty	array	Checks if an array is non-empty (has at least one element).
isNonEmpty	object	Checks if a plain object has at least one own enumerable string-keyed property.
isNonEmpty	string	Checks if a string is non-empty (has at least one character).
isNotBlank	string	Checks if a string is not blank — non-empty and contains at least one non-whitespace character.
isNull	type	Checks if a value is null.
isNullish	type	Checks if a value is null or undefined (nullish).
isNumber	type	Checks if a value is a number.
isObservable	observable	Checks if a value is an RxJS Observable or any compatible observable.
isOdd	number	Checks if a value is an odd integer.
isPlainObject	type	Checks if a value is a plain object.
isPositive	number	Checks if a value is a number greater than 0.
isPrerelease	version	Returns true when the version string has a prerelease suffix (i.e.
isPrimitive	type	Checks if a value is a JavaScript primitive.
isPromise	type	Checks if a value is a Promise or a thenable.
isPromiseLike	type	Checks if a value is a thenable (has a .then() method).
isPropertyKey	type	Checks if a value is a valid property key: string, number, or symbol.
isRegExp	type	Checks if a value is a RegExp instance.
isSafeInteger	type	native JS Number.isSafeInteger(value) (ES2015)
isSameDay	date	Checks if two dates are the same day.
isSameMonth	date	Checks if two dates are in the same month (and year).
isSameYear	date	Checks if two dates are in the same year.
isSet (Set data structure)	type	native JS value instanceof Set (ES2015)
isSharedArrayBuffer	node	Checks if a value is a SharedArrayBuffer instance.
isSpecialObject	type	Determines if a value is a special object that should not have its properties compared deeply.
isString	type	Checks if a value is a string.
isSymbol	type	Checks if a value is a symbol.
isTemporalDuration	type	Checks if a value is a Temporal.Duration.
isTemporalInstant	type	Checks if a value is a Temporal.Instant.
isTemporalPlainDate	type	Checks if a value is a Temporal.PlainDate.
isTemporalPlainDateTime	type	Checks if a value is a Temporal.PlainDateTime.
isTemporalPlainTime	type	Checks if a value is a Temporal.PlainTime.
isTemporalZonedDateTime	type	Checks if a value is a Temporal.ZonedDateTime.
isTimestamp	type	Checks if a value is a valid timestamp (milliseconds or Unix seconds).
isTimestampInSeconds	date	Checks if a timestamp is likely in seconds (Java/Unix style) vs milliseconds (JavaScript style)
isTruthy	type	Checks if a value is truthy (not false, null, undefined, 0, "", or NaN).
isUndefined	type	Checks if a value is undefined.
isValid	date	Checks if a value is a valid Date instance (not Invalid Date).
isValidDateString	date	Checks whether a string can be parsed into a valid Date.
isValidRegex	type	Checks if a string is a valid regex pattern.
isWeakMap / isWeakSet / isWeakRef	type	native JS value instanceof WeakMap / WeakSet / WeakRef (ES2015 / ES2021)
isWeekend	date	Checks whether a date falls on a weekend day.
isWithinRange	date	Checks whether a date falls within a range (inclusive on both ends).
kebabCase	string	Converts camelCase to kebab-case
keys / values	object	native JS Object.keys() / Object.values() (ES2017)
last	array	native JS Array.prototype.at(-1) (ES2022)
leadingSentence	string	Extracts the leading sentence from a string.
lerp	number	Linearly interpolates between start and end by the factor t.
listTimezones	date	Returns the list of IANA timezone identifiers supported by the runtime.
map	object	Transforms the values and/or keys of a plain object in a single pass.
max	array	Returns the maximum value in an array using a loop instead of spread, avoiding the call stack overflow that occurs wi…
mean	number	Calculates the arithmetic mean (average) of an array of numbers.
meaningPromiseOrThrow	promise	Returns a function that passes through meaningful data or throws an error.
memoize	function	Returns a memoized version of the function that caches results
merge (shallow)	object	native JS { ...a, ...b } or Object.assign({}, a, b) (ES2015)
min	array	Returns the minimum value in an array using a loop instead of spread, avoiding the call stack overflow that occurs wi…
min / max	number	native JS Math.min(...arr) / Math.max(...arr) (ES1)
negate	function	Creates a function that negates the result of predicate.
noop	function	A no-operation function that does nothing and returns undefined Useful as a default callback, placeholder, or to e…
normalizeTimestamp	date	Converts a timestamp to JavaScript milliseconds format
now (date/time/instant)	date	native JS Temporal.Now.instant() / .zonedDateTimeISO() / .plainDateISO() / .plainTimeISO() (Temporal (Stage 3))
omit	object	Creates a new object without the specified keys.
once	function	Creates a function that is restricted to be called only once.
onlyPath	url	Extract only the path from an URI with optional query and fragments.
overlaps	date	Checks whether two date ranges overlap.
padStart / padEnd	string	native JS String.prototype.padStart() / padEnd() (ES2017)
parallel	promise	Runs an array of async functions with a concurrency limit.
parse	version	Parses a semantic version string into its components according to SemVer 2.0.0 specification Supports: - Core versio…
parseConventionalCommit	commit	Parses a Conventional Commits message into a structured object.
parsePackageRepository	url	Parse the repository field from package.json into a structured object.
partial	function	Partially applies arguments to a function, returning a new function that accepts the remaining arguments.
partition	array	Splits an array into two groups based on a predicate function.
pascalCase	string	Converts a string to PascalCase.
pick	object	Creates a new object with only the specified keys.
pipe	function	Composes functions left-to-right: the output of each function is passed as input to the next.
randomBetween	number	Generates a random number between min and max (inclusive)
randomIntBetween	number	Generates a random integer between min and max (inclusive)
range	array	Generates an array of sequential numbers from start to end (exclusive).
relativeURLToAbsolute	url	Converts a relative URL to an absolute URL using the current document base URI.
removeUndefinedNull	object	Remove null and undefined values from an object.
repeat	string	native JS String.prototype.repeat() (ES2015)
resolveRecord	promise	Resolves an array of keys into a record by calling an async mapper for each key.
retry	promise	Retries a promise-returning function up to maxAttempts times
returnOrThrowError	function	Return a value or throw an error if null or undefined.
reverse	array	native JS Array.prototype.toReversed() (ES2023)
roundTo	number	Rounds a number to specified decimal places
safeDate	date	Safely creates a Date object from various input types.
safeFetch	promise	Wraps fetch with built-in error handling: returns null when the request fails (network error, non-OK status, or p…
safeJsonParse	object	Parses a JSON string, returning null (or a fallback) on any parse failure.
sample	array	Picks one or more random elements from an array.
satisfiesRange	version	Checks if a version satisfies a range (simple implementation)
select	array	Filters and transforms an array in a single pass.
select / filterMap	array	native JS Array.prototype.filter().map() (ES5)
set	object	Sets a value in an object using a dot-notated path
shuffle	array	Randomly reorders elements of an array using the Fisher-Yates algorithm.
slugify	string	Converts a string into a URL-friendly slug.
snakeCase	string	Converts a string to snake_case.
sort (basic comparator)	array	native JS (a, b) => a - b / a.localeCompare(b) (ES1)
sortBy / orderBy	array	native JS Array.prototype.toSorted(fn?) (ES2023)
sortNumberAscFn	array	Sort numbers in ascending order
sortNumberDescFn	array	Sort numbers in descending order
sortStringAscFn	array	Sort strings in ascending order
sortStringAscInsensitiveFn	array	Sort strings in ascending order (case insensitive)
sortStringDescFn	array	Sort strings in descending order
sortStringNaturalAscFn	array	Sort strings in ascending order using natural (human-friendly) ordering.
sortStringNaturalAscInsensitiveFn	array	Sort strings in ascending natural order (case insensitive).
sortStringNaturalDescFn	array	Sort strings in descending order using natural (human-friendly) ordering.
sortStringNaturalDescInsensitiveFn	array	Sort strings in descending natural order (case insensitive).
startOf	date	Returns a new Date set to the start of the given unit.
startsWith / endsWith	string	native JS String.prototype.startsWith() / endsWith() (ES2015)
statusToBadge	ci	Maps a CI/CD job status to an inline code badge string.
statusToIcon	ci	Maps a CI/CD job status to an emoji icon.
stringify	version	Reconstruct a semantic version string from a ParsedVersion object.
stripV	version	Strip the leading “v” from a version string if it exists.
sum	number	Calculates the sum of an array of numbers.
tail	array	native JS Array.prototype.slice(1) (ES3)
take	array	native JS Array.prototype.slice(0, n) (ES3)
template	string	Interpolates {{key}} placeholders in a template string with values from a data record.
throttle	function	Creates a throttled function that only invokes func at most once per every wait milliseconds
timeAgo	date	Formats a date as a human-readable relative time string.
timeout	promise	Wraps a promise to reject with a TimeoutError if it does not resolve within the specified duration.
titleCase	string	Converts a string to Title Case.
toInt / toFloat	number	native JS parseInt(str, 10) / parseFloat(str) (ES1)
toISO8601	date	Converts a date to ISO 8601 format Format: YYYY-MM-DDTHH:mm:ss.sssZ
toMillis	date	Converts a date to a timestamp in milliseconds (epoch millis).
toPairs / fromPairs	object	native JS Object.entries() / Object.fromEntries() (ES2019)
toPlainDate / toPlainDateTime / toPlainTime	date	native JS Temporal.ZonedDateTime.prototype.toPlainDate() / toPlainDateTime() / toPlainTime() (Temporal (Stage 3))
toRFC2822	date	Converts a date to RFC 2822 format Format: Day, DD Mon YYYY HH:mm:ss +0000 Used in email headers (Date field) and HTT…
toRFC3339	date	Converts a date to RFC 3339 format Format: YYYY-MM-DDTHH:mm:ssZ or YYYY-MM-DDTHH:mm:ss+HH:mm RFC 3339 is a profile of…
toSeconds	date	Converts a date to a timestamp in seconds (epoch seconds).
toTemporalInstant	date	native JS Date.prototype.toTemporalInstant() (Temporal (Stage 3))
toZonedDateTime	date	native JS Temporal.Instant.prototype.toZonedDateTimeISO(tz) (Temporal (Stage 3))
trim / trimStart / trimEnd	string	native JS String.prototype.trim() / trimStart() / trimEnd() (ES2019)
truncate	string	Truncates a string to maxLength characters, appending an ellipsis when cut.
truthyPromiseOrThrow	promise	Returns a function that passes through truthy data or throws an error.
tryit	promise	Wraps a function so it never throws.
TypedArrays (isInt8Array, isFloat32Array, ...)	type	native JS value instanceof Int8Array / Float32Array / ... (ES2015)
union	array	native JS unique([...a, ...b]) (ES2015)
unique	array	Removes duplicate values from an array
until / since (difference)	date	native JS Temporal.PlainDate.prototype.until(other) / .since(other) (Temporal (Stage 3))
unzip	array	Splits an array of tuples into separate arrays, one per position.
uuid7	id	Generates a UUID v7 string (RFC 9562).
WeekDays	date	Named day-of-week constants following the JavaScript Date.getDay() convention.
withLeadingSlash	url	Adds a leading slash / to the given URL if it is not already present.
without	array	Returns a new array with all occurrences of the given values removed.
withoutLeadingSlash	url	Removes the leading slash / from the given URL if it is present.
withoutTrailingSlash	url	Removes the trailing slash / from the given URL if it is present.
withResolvers	promise	native JS Promise.withResolvers() (ES2024)
withTrailingSlash	url	Adds a trailing slash / to the given URL if it is not already present.
words	string	Splits a string into an array of words.
zip	array	Combines multiple arrays element-by-element into an array of tuples.