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TypeScript
Rust
Dev Container
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AI
Resources
TypeScript
Getting Started
Categories
≡ Overview
animation
≡ Overview
cubicBezier
frameLoop
interpolate
parseEasing
spring
steps
toCssLinear
tween
array
≡ Overview
cartesianProduct
chunk
combineSortFns
compact
countBy
createSortByBooleanFn
createSortByDateFn
createSortByNaturalFn
createSortByNumberFn
createSortByStringFn
difference
ensureArray
equalsDeep
equalsShallow
equalsUnordered
filterAsync
findMap
forEachAsync
intersection
intersects
isEmpty
isNonEmpty
mapAsync
mapSettled
max
maxBy
mean
meanBy
median
min
minBy
partition
percentile
range
replaceOrAppend
reverseSortFn
sample
select
shuffle
sortNumberAscFn
sortNumberDescFn
sortStringAscFn
sortStringAscInsensitiveFn
sortStringDescFn
sortStringNaturalAscFn
sortStringNaturalAscInsensitiveFn
sortStringNaturalDescFn
sortStringNaturalDescInsensitiveFn
sum
sumBy
symmetricDifference
toggle
unique
uniqueBy
unzip
without
zip
binary
≡ Overview
createByteReader
createByteWriter
mediaTypeOf
mediaTypeOfPath
toHex
zigzagDecode
zigzagEncode
browser
≡ Overview
createFileStore
decodeImage
loadFont
matchesMedia
observeIntersection
observeResize
onPointerIntent
prefersReducedMotion
preloadImages
reflectAttribute
requestWorker
sha256Hex
watchMedia
whenIdle
ci
≡ Overview
buildStatusTable
DEFAULT_PERCENTAGE_TIERS
percentageToTier
statusToBadge
statusToIcon
color
≡ Overview
argbToRgb
blendColors
contrastRatio
hexToRgb
hsbToRgb
hslToCss
hslToRgb
mixColors
premultiply
relativeLuminance
rgbToCss
rgbToHex
rgbToHsb
rgbToHsl
rgbToUnit
unitToRgb
unpremultiply
commit
≡ Overview
analyzeCommits
buildConventionalCommitRegex
isConventionalCommit
parseConventionalCommit
date
≡ Overview
addDays
addMonths
addYears
clampDate
compare
daysInMonth
difference
eachDay
eachMonth
endOf
ensureDate
format
formatDuration
formatInTimezone
formatPartial
fromMillis
fromSeconds
getTimezoneOffset
isBusinessDay
isLeapYear
isoWeek
isSameDay
isSameMonth
isSameYear
isTimestampInSeconds
isValid
isValidDateString
isWeekend
isWithinRange
listTimezones
normalizeTimestamp
overlaps
parseDuration
parsePartial
startOf
timeAgo
toISO8601
toMillis
toRFC2822
toRFC3339
toSeconds
WeekDays
fetch
≡ Overview
fetchJson
fetchOrThrow
safeFetch
font
≡ Overview
pickClosest
function
≡ Overview
compose
createCachedResolver
curry
debounce
flip
identity
memoize
negate
noop
once
partial
pipe
returnOrThrowError
throttle
unary
geography
≡ Overview
distance
isWithinDistance
geometry
≡ Overview
applyToPoint
applyToRect
contains
ellipsePath
fit
fitContain
fitCover
fitFill
fitNone
fitScaleDown
formatPath
identity
intersection
intersects
invert
matrixToCss
multiply
parsePath
rectToRect
rotate
roundedRectPath
scale
simplifyPolyline
transformPath
translate
union
guard
≡ Overview
isArray
isArrayBuffer
isArrayLike
isAsyncFunction
isAsyncGenerator
isAsyncGeneratorFunction
isAsyncIterable
isBigInt
isBlob
isBoolean
isBrowser
isCanonicalJson
isCssColor
isDate
isDefined
isError
isFalsy
isFormData
isFunction
isGenerator
isGeneratorFunction
isHostname
isIJson
isIterable
isJSON
isJson5
isJSONArray
isJsonc
isJSONObject
isJsonSequence
isJSONValue
isLength
isMap
isNdjson
isNode
isNull
isNullish
isNumber
isPlainObject
isPrimitive
isPromise
isPromiseLike
isPropertyKey
isRegExp
isSet
isSpecialObject
isString
isSymbol
isTemporalDuration
isTemporalInstant
isTemporalPlainDate
isTemporalPlainDateTime
isTemporalPlainTime
isTemporalZonedDateTime
isTimestamp
isTruthy
isUndefined
isValidRegex
isWeakMap
isWeakMapKey
isWeakSet
id
≡ Overview
uuid7
json
≡ Overview
parse
parseLines
parseSequence
parseStrict
safeParse
safeParseLines
safeParseSequence
safeParseStrict
stringify
stringifyForHtml
stringifyLines
stringifySequence
license
≡ Overview
agree
families
isKnown
map
≡ Overview
countBy
every
filter
findKey
findValue
hasValue
mapKeys
mapValues
reduce
some
toMapByKey
markdown
≡ Overview
escape
node
≡ Overview
isBuffer
isNodeStream
isSharedArrayBuffer
safeReadJsonFile
withTempDir
number
≡ Overview
clamp
correctFloat
extractNumber
formatCompact
formatSize
inRange
isEven
isNegative
isOdd
isPositive
lerp
randomBetween
randomIntBetween
roundTo
object
≡ Overview
camelCaseKeys
clone
cloneDeep
compact
diff
equalsDeep
equalsShallow
flatten
get
groupBy
invert
isEmpty
isNonEmpty
kebabCaseKeys
map
mapDeep
mergeDeep
omit
omitBy
parsePropertyPath
pascalCaseKeys
pick
pickBy
removeUndefinedNull
safeJsonParse
set
snakeCaseKeys
sortKeys
titleCaseKeys
unflatten
unset
update
observable
≡ Overview
combine
combineLatest
isObservable
package
≡ Overview
AlpineDependency
AlpineOperator
ArchDependency
ComparisonOperator
DebianDependency
DebianDependencyOptions
DebianOperator
DependencyConstraint
parseDeb822
parseDependencies
Pep508Dependency
Pep508Operator
RpmDependency
stringifyDependencies
promise
≡ Overview
consoleLogPromise
createMutex
createSemaphore
defer
delay
falsyPromiseOrThrow
fetchJson
fetchOrThrow
guard
meaningPromiseOrThrow
paginate
parallel
parallelSettle
resolveRecord
retry
safeFetch
settle
timeout
truthyPromiseOrThrow
tryit
set
≡ Overview
countBy
filter
map
toMapByKey
string
≡ Overview
camelCase
capitalize
createGlobMatcher
createMatcher
createRegexMatcher
createSafeMatcher
dedent
deobfuscate
escapeHtml
escapeRegExp
excerpt
extractErrorMessage
formatProgressBar
fromBase64
globToRegExp
injectWordBreaks
isBlank
isEmpty
isNonEmpty
isNotBlank
kebabCase
leadingSentence
levenshteinDistance
levenshteinSimilarity
matchGlob
obfuscate
parsePatternOrRegExp
pascalCase
removeDiacritics
slugify
snakeCase
stripHtml
template
titleCase
toBase64
trim
trimEnd
trimStart
truncate
unescapeHtml
unorderedPairKey
words
structure
≡ Overview
createBackStack
createUnionFind
type
≡ Overview
AbortSignalLike
Brand
DeepGet
DeepPartial
DeepSet
DeepWritable
KeysOfType
Maybe
Nullable
Nullish
OmitByValue
OptionalKeys
PickByValue
Prettify
RequiredKeys
UnionToIntersection
ValueOf
url
≡ Overview
cleanPath
extractPureURI
isExternal
onlyPath
parsePackageRepository
relativeURLToAbsolute
withLeadingSlash
withoutLeadingSlash
withoutTrailingSlash
withTrailingSlash
version
≡ Overview
compare
increment
incrementPrerelease
isPrerelease
isValid
parse
ParsedVersion
satisfiesRange
sortVersions
stringify
stripV
Presets
≡ Overview
TypeScript
oxlint
oxfmt
Vitest
Stryker
cspell
EditorConfig and git-cliff
Reference
Philosophy
Changelog
Migration (v2 → v3)
Contributing
Name Conflicts
AI & LLM Support
Comparisons
Alternative Libraries
helpers4 vs Lodash
helpers4 vs Radashi
helpers4 vs Remeda
helpers4 vs es-toolkit
helpers4 vs Rambda
Legal
Library Dependencies
License (LGPL-3.0)
8.4
100%
2
GitHub
Choose a version
Latest (v3)
v2 (2026)
v1 (2022)
oxfmt preset
oxfmt
-c
node_modules/@helpers4/presets/oxfmt.json
Source
Section titled “Source”
View source on GitHub
