Nodash

Nodash is a native ESM implementation of the Lodash API.

Installing

TODO

Motivations

Native API Calls

Lodash uses custom implementations of modern browser APIs, which is great for projects targeting older versions of ECMAScript without a build process.

However, most modern JS projects implement some build pipeline, where high-level JS constructs are downleveled to an older target (e.g. ES6) at build time.

In contrast, Nodash leverages bleeding edge native API implementations where available:

export const toPairs = Object.entries;

This allows each project to individually target as high a JS target as necessary, taking advantage of native browser API calls and their superior debugging experience.

Happy Case First

Lodash is highly tolerant to nullish input, which can be a benefit for JS projects without strong static typing.

However, this can be a frustrating source of bugs, where undefined or null data sources are silently handled.

_.forEach(undefined, (i) => console.log(i));
// *crickets*

It's also often a source of unnecessary inefficiency, where nil checks need to be run before iterating your well-behaved data source.

Nodash has a truthy API, where methods expect a well behaved data source. This forces you to explictly guard your input data.

Nodash.forEach(undefined, (i) => console.log(i));
// Uncaught TypeError: Cannot read properties of undefined (reading 'forEach')

Immutability

Many of Lodash's methods are mutable, meaning that they perform in-place operations on their data source.

const myArray = [1, 2, 3];

console.log(_.reverse(myArray)); // => [3, 2, 1]
console.log(myArray); // => [3, 2, 1]

Nodash has an immutable-first API, unless the method expliclty declares otherwise.

const myArray = [1, 2, 3];

console.log(Nodash.reverse(myArray)); // => [3, 2, 1]
console.log(myArray); // => [1, 2, 3]

First Class TypeScript Support

Nodash is written in TypeScript, and ships with its own type definitions. No need for @types/nodash!

Lodash API Checklist

The following table lists all methods of the Lodash API, along with their Nodash implementation, testing, and coverage status.

Method	Implemented?	Tested?	Coverage?
add	✅
after
ary
assign	✅
assignIn
assignInWith
assignWith
at
attempt	✅
before
bind
bindAll
bindKey
camelCase	✅
capitalize
castArray	✅
ceil	✅
chain
chunk	✅
clamp	✅
clone
cloneDeep
cloneDeepWith
cloneWith
commit
compact	✅
concat
cond
conforms
conformsTo
constant	✅
countBy
create
curry
curryRight
date	✅
debounce
deburr
defaultTo
defaults
defaultsDeep
defer
delay
difference	✅
differenceBy	✅
differenceWith
divide	✅
drop
dropRight	✅
dropRightWhile	✅
dropWhile	✅
each	✅
eachRight	✅
endsWith	✅
entries	✅
entriesIn
eq	✅
escape
escapeRegExp
every
extend
extendWith
fill	✅
filter
find
findIndex	✅
findKey
findLast
findLastIndex	✅
findLastKey
first	✅
flatMap
flatMapDeep
flatMapDepth
flatten	✅
flattenDeep
flattenDepth	✅
flip
floor	✅
flow
flowRight
forEach	✅
forEachRight	✅
forIn
forInRight
forOwn
forOwnRight
fromPairs	✅
functions
functionsIn
get
groupBy
gt	✅
gte	✅
has
hasIn
head	✅
identity	✅
inRange	✅
includes
indexOf	✅
initial	✅
intersection	✅
intersectionBy
intersectionWith
invert
invertBy
invoke
invokeMap
isArguments
isArray	✅
isArrayBuffer
isArrayLike
isArrayLikeObject
isBoolean	✅
isBuffer	✅
isDate	✅
isElement
isEmpty	✅
isEqual
isEqualWith
isError	✅
isFinite	✅
isFunction
isInteger	✅
isLength
isMap	✅
isMatch
isMatchWith
isNaN
isNative
isNil	✅
isNull	✅
isNumber
isObject
isObjectLike
isPlainObject
isRegExp	✅
isSafeInteger
isSet
isString	✅
isSymbol
isTypedArray
isUndefined	✅
isWeakMap
isWeakSet
iteratee
join	✅
kebabCase
keyBy
keys	✅
keysIn
last	✅
lastIndexOf	✅
wrapperLodash
lowerCase
lowerFirst	✅
lt	✅
lte	✅
map
mapKeys
mapValues
matches
matchesProperty
max	✅
maxBy	✅
mean	✅
meanBy	✅
memoize
merge
mergeWith
method
methodOf
min	✅
minBy	✅
mixin
multiply	✅
negate
next
noop	✅
now
nth	✅
nthArg	✅
omit
omitBy
once
orderBy
over	✅
overArgs
overEvery	✅
overSome	✅
pad
padEnd	✅
padStart	✅
parseInt	✅
partial
partialRight
partition
pick
pickBy
plant
property
propertyOf
pull	✅
pullAll	✅
pullAllBy
pullAllWith
pullAt	✅
random	✅
range	✅
rangeRight	✅
rearg
reduce
reduceRight
reject
remove	✅
repeat	✅
replace	✅
rest
result
reverse	✅
round	✅
sample	✅
sampleSize
set
setWith
shuffle
size	✅
slice	✅
snakeCase
some
sortBy
sortedIndex
sortedIndexBy
sortedIndexOf
sortedLastIndex
sortedLastIndexBy
sortedLastIndexOf
sortedUniq
sortedUniqBy
split	✅
spread
startCase
startsWith	✅
stubArray	✅
stubFalse	✅
stubObject	✅
stubString
stubTrue	✅
subtract	✅
sum
sumBy
tail	✅
take	✅
takeRight	✅
takeRightWhile
takeWhile
tap
template
templateSettings
throttle
thru
times	✅
toArray
toFinite
toInteger
toIterator
toJSON
toLength
toLower	✅
toNumber	✅
toPairs	✅
toPairsIn
toPath	✅
toPlainObject
toSafeInteger
toString	✅
toUpper	✅
transform
trim	✅
trimEnd	✅
trimStart	✅
truncate	✅
unary
unescape
union	✅
unionBy	✅
unionWith
uniq	✅
uniqBy	✅
uniqWith
uniqueId
unset
unzip	✅
unzipWith
update
updateWith
upperCase
upperFirst	✅
value	✅
valueOf
values
valuesIn
without
words
wrap
xor	✅
xorBy
xorWith
zip	✅
zipObject	✅
zipObjectDeep
zipWith