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kind-of
Get the native type of a value.
arguments array boolean check date function is is-type is-type-of kind kind-of number object of
fill-range
Fill in a range of numbers or letters, optionally passing an increment or `step` to use, or create a regex-compatible range with `options.toRegex`
alpha alphabetical array bash brace expand expansion fill glob match matches matching number numerical
braces
Bash-like brace expansion, implemented in JavaScript. Safer than other brace expansion libs, with complete support for the Bash 4.3 braces specification, without sacrificing speed.
alpha alphabetical bash brace braces expand expansion filepath fill fs glob globbing letter match
to-regex-range
Pass two numbers, get a regex-compatible source string for matching ranges. Validated against more than 2.78 million test assertions.
bash date expand expansion expression glob match match date match number match numbers match year matches matching number
is-number
Returns true if a number or string value is a finite number. Useful for regex matches, parsing, user input, etc.
cast check coerce coercion finite integer is isnan is-nan is-num is-number isnumber isfinite istype
es-to-primitive
ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.
primitive abstract ecmascript es5 es6 es2015 toPrimitive coerce type object string number boolean symbol
normalized-number
Rescales a number (min-max normalization)
normalization scaling normalize number range
decimal.js
An arbitrary-precision Decimal type for JavaScript.
arbitrary precision arithmetic big number decimal float biginteger bigdecimal bignumber bigint bignum
big.js
A small, fast, easy-to-use library for arbitrary-precision decimal arithmetic
arbitrary precision arithmetic big number decimal float biginteger bigdecimal bignumber bigint bignum
has-value
Returns true if a value exists, false if empty. Works with deeply nested values using object paths.
array boolean check deep empty function has hasOwn is-empty nested null number object object path
has-values
Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.
array boolean empty find function has hasOwn javascript js key keys node.js null number
is-negative-zero
Is this value negative zero? === will lie to you
is negative zero negative zero number positive 0 -0
strnum
Parse String to Number based on configuration
string number parse convert
bignumber.js
A library for arbitrary-precision decimal and non-decimal arithmetic
arbitrary precision arithmetic big number decimal float biginteger bigdecimal bignumber bigint bignum
micromark-util-decode-numeric-character-reference
micromark utility to decode numeric character references
micromark util utility decode numeric number character reference
libphonenumber-js
A simpler (and smaller) rewrite of Google Android's libphonenumber library in javascript
telephone phone number input mobile libphonenumber
is-nan
ES2015-compliant shim for Number.isNaN - the global isNaN returns false positives.
is NaN not a number number isNaN ES6 ES2015 shim polyfill es-shim API
pretty-ms
Convert milliseconds to a human readable string: `1337000000` → `15d 11h 23m 20s`
pretty prettify human humanize humanized readable time ms milliseconds duration period range text string
decimal.js-light
An arbitrary-precision Decimal type for JavaScript.
arbitrary precision arithmetic big number decimal float biginteger bigdecimal bignumber bigint bignum
typical
Isomorphic, functional type-checking for Javascript
type checking check value valid is detect number object plainobject array like defined string

Search npm for packages to use with Deno

kind-of

fill-range

braces

to-regex-range

is-number

es-to-primitive

normalized-number

decimal.js

big.js

has-value

has-values

is-negative-zero

strnum

bignumber.js

micromark-util-decode-numeric-character-reference

libphonenumber-js

is-nan

pretty-ms

decimal.js-light

typical