All Functions

All Functions

168 implemented helpers + 40 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.
camelCase	string	Converts kebab-case to camelCase
capitalize	string	Capitalizes the first letter of a string
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))
consoleLogPromise	promise	Returns a function that logs data to the console and passes it through.
createSortByDateFn	array	Creates a sort function for objects by date property
createSortByNumberFn	array	Creates a sort function for objects by number property
createSortByStringFn	array	Creates a sort function for objects by string property
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
deepCompare	object	Deep comparison of two objects that returns detailed information about differences.
deepEquals	array	Deep comparison of two arrays that only returns true or false.
deepMerge	object	Merges two or more objects deeply
delay	promise	Creates a promise that resolves after specified delay
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.
equals	array	Simple helper that checks if two lists are identical.
extractErrorMessage	string	Convert an error to a readable message.
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)
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 / 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…
intersection	array	Compute the intersection of two arrays, meaning the elements that are present in both arrays.
isArray	type	Checks if a value is an array.
isArrayBuffer	type	Checks if a value is an ArrayBuffer instance.
isAsyncFunction	type	Checks if a value is an async function.
isBigInt	type	Checks if a value is a bigint.
isBlob	type	Checks if a value is a Blob instance.
isBoolean	type	Checks if a value is a boolean.
isBuffer	type	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	type	Checks if a value is empty.
isError	type	Checks if a value is an Error instance.
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.
isHtmlElement / isUrlInstance / isUrlSearchParams	type	native JS value instanceof HTMLElement / URL / URLSearchParams (Web API)
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)
isNegativeNumber	type	Checks if a value is a number less than 0.
isNonEmptyArray	type	Checks if a value is a non-empty array (length > 0).
isNonEmptyString	type	Checks if a value is a non-empty string (length > 0).
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.
isPlainObject	type	Checks if a value is a plain object.
isPositiveNumber	type	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.
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)
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.
isValidDate	type	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)
listTimezones	date	Returns the list of IANA timezone identifiers supported by the runtime.
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 / max	number	native JS Math.min(...arr) / Math.max(...arr) (ES1)
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.
oneInCommon	array	Simple helper that check if two lists shared at least an item in common.
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.
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.
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)
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.
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)
set	object	Sets a value in an object using a dot-notated path
shallowEquals	array	Quick comparison of two arrays using JSON.stringify.
shallowEquals	object	Quick comparison of two objects using JSON.stringify.
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.
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
startOf	date	Returns a new Date set to the start of the given unit.
startsWith / endsWith	string	native JS String.prototype.startsWith() / endsWith() (ES2015)
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)
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)
unique	array	Removes duplicate values from an array
until / since (difference)	date	native JS Temporal.PlainDate.prototype.until(other) / .since(other) (Temporal (Stage 3))
uuid7	math	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.
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.