JSPM

Test if an array-like value contains a search value.

Check if a string only contains alphanumeric characters

Contains some util methods for converting numbers into words, ordinal words and ordinal numbers.

string contains methods that aren't included in the vanilla JavaScript string such as escaping html, decoding html entities, stripping tags, etc.

Throws an error if a string is found.

qsu is a utility library that contains useful and frequently used functions. Start with your preferred language and the modern development environment.

A simple validation to check if a string or array contains a know first name

The string_decoder module from Node core

Contains some util methods for converting numbers into words, ordinal words and ordinal numbers.

Functions for dealing with a PostgresSQL connection string

A plain text serializer for Slate editors.

This is a runtime library for [TypeScript](https://www.typescriptlang.org/) that contains all of the TypeScript helper functions.

This is a runtime library for [TypeScript](https://www.typescriptlang.org/) that contains all of the TypeScript helper functions.

An easy, semantic and reliable way to split a string into characters in JavaScript, even when it contains emojis, flags and diacritics

ANSI escape codes for styling strings in the terminal

Strip ANSI escape codes from a string

Terminal string styling done right

Regular expression for matching ANSI escape codes

Get the visual width of a string - the number of columns required to display it

Escape RegExp special characters

Wordwrap a string with ANSI escape codes

Get the native type of a value.

Check if the character represented by a given Unicode code point is fullwidth

Get a stream as a string, Buffer, ArrayBuffer or array

Convert a dash/dot/underscore/space separated string to camelCase or PascalCase: `foo-bar` → `fooBar`

Strip UTF-8 byte order mark (BOM) from a string

React library to safely render HTML, filter attributes, autowrap text, autolink, and much more.

Parse JSON with more helpful errors

Given some data, jsesc returns the shortest possible stringified & ASCII-safe representation of that data.

Returns `true` if the given string looks like a glob pattern or an extglob pattern. This makes it easy to create code that only uses external modules like node-glob when necessary, resulting in much faster code execution and initialization time, and a bet

Modify strings, generate sourcemaps

Matches strings against configurable strings, globs, regular expressions, and/or functions

ANSI escape codes for manipulating the terminal

Returns true if a string has an extglob.

Strip the final newline character from a string or Uint8Array

Slice a string with ANSI escape codes

prelude.ls is a functionally oriented utility library. It is powerful and flexible. Almost all of its functions are curried. It is written in, and is the recommended base library for, LiveScript.

Efficient implementation of Levenshtein algorithm with locale-specific collator support.

Compare strings containing a mix of letters and numbers in the way a human being would in sort order.

Indent each line in a string

ECMAScript “ToPrimitive” algorithm. Provides ES5 and ES2015 versions.

Check if a string contains only numeric emoji characters (0️⃣-9️⃣)

Is this value a JS String object or primitive? This module works cross-realm/iframe, and despite ES6 @@toStringTag.

Parse String to Number based on configuration

Convert a camelized string into a lowercased one with a custom separator: unicornRainbow → unicorn_rainbow

A JavaScript library for escaping CSS strings and identifiers while generating the shortest possible ASCII-only output.

Strip leading whitespace from each line in a string

ES5 spec-compliant shim for String.prototype.trim

Get the real length of a string - by correctly counting astral symbols and ignoring ansi escape codes

Measure the difference between two strings using the Levenshtein distance algorithm

A robust HTML entities encoder/decoder with full Unicode support.

Easily add ANSI colors to your text and symbols in the terminal. A faster drop-in replacement for chalk, kleur and turbocolor (without the dependencies and rendering bugs).

Querystringify - Small, simple but powerful query string parser.

Normalize a URL

Small footprint URL parser that works seamlessly across Node.js and browser environments

Truncate a string to a specific width in the terminal

Strip redundant indentation and indent the string

Compile regular expressions' unicodeSets (v) flag.

Get the shortest leading whitespace from lines in a string

Robustly get an object's own property keys (strings and symbols), including non-enumerables when possible

Generate a cryptographically strong random string

Returns true if any values exist, false if empty. Works for booleans, functions, numbers, strings, nulls, objects and arrays.

Generate a unique random string

A robust polyfill for the `CSS.escape` utility method as defined in CSSOM.

A robust & optimized `String.prototype.repeat` polyfill, based on the ECMAScript 6 specification.

Parse regular expressions' unicodeSets (v) flag.

Returns true if a value exists, false if empty. Works with deeply nested values using object paths.

LZ-based compression algorithm

Detect the indentation of code

Repeat the given string n times. Fastest implementation for repeating a string.

Determine the East Asian Width of a Unicode character

Trim newlines from the start and/or end of a string

Get the visual width of the widest line in a string - the number of columns required to display it

Check if a string has ANSI escape codes

mdast utility to get the plain text content of a node

Fastest Levenshtein distance implementation in JS.

Check if a character is alphabetical

A robust & optimized `String.prototype.includes` polyfill, based on the ECMAScript 6 specification.

a few common utility template tags for ES2015

Convert object keys to camel case

Wildcard matching tools

Parse and stringify URL query strings

Compute ripemd160 of bytes or strings.

Check if a character is decimal

Check if a character is hexadecimal

Get the gzipped size of a string or buffer

Check if a character is alphanumerical

Create an array by repeating the given value n times.

CommonJS version - The smallest and fastest command-line coloring package on the internet

micromark utility to decode markdown strings

Math and string formula parser.

Easy way to split a string on a given character unless it's quoted or escaped.

string contains methods that aren't included in the vanilla JavaScript string such as escaping html, decoding html entities, stripping tags, etc.

Convert a string to pascal case (upper camelcase).

Convert milliseconds to a human readable string: `1337000000` → `15d 11h 23m 20s`

Convert object keys from camel case

A module that parses a string as regular expression and returns the parsed value.

Formatting Date objects as strings since 2013

Compare strings containing a mix of letters and numbers in the way a human being would in sort order.

Isomorphic, functional type-checking for Javascript

Split a string on the first occurance of a given separator

Hashing made simple. Get the hash of a buffer/string/stream/file.

Get the system locale

Various helper utilities

Colorized string diff ideal for text/code that spans through multiple lines

Convert a string index to its line and column position

Compare alphanumeric strings the same way a human would, using a natural order algorithm

Simple micro templating

Repeat a string - fast

Convert a string to a valid safe filename

Remove wrapping quotes from a string.

The most efficient JS implementation calculating the Levenshtein distance, i.e. the difference between two strings.

Check if array contains unique stringified values

Mapping between standard locale identifiers and Windows locale identifiers (LCID)

Functional errors with formatted output

Convert a value to a ReadableStream

Useful utilities for working with Uint8Array (and Buffer)

ES2017 spec-compliant String.prototype.padEnd shim.

Strip a substring from the start/end of a string

Skiff is a privacy-first, end-to-end encrypted workspace with Mail, Calendar, Pages, and Drive product. Sign up for a free Skiff Mail account at [skiff.com](https://skiff.com). This monorepo contains all Skiff apps, libraries, and more. You can sign up, u

Terminal string styling with tagged template literals

Trim a consecutively repeated substring: foo--bar---baz → foo-bar-baz

The smallest and fastest command-line coloring package on the internet

Returns `true` if the value is a primitive.

Convert a string/promise/array/iterable/asynciterable/buffer/typedarray/arraybuffer/object into a stream

Functions that surround a string with ansicolor codes so it prints in color.

A tiny (305B) browser utility for stringifying a query Object.

Simple wildcard matching

UTF-safe string operations

Remove the trailing spaces from a string.

The string_decoder module from Node core

A robust & optimized `String.prototype.startsWith` polyfill, based on the ECMAScript 6 specification.

Check if a string is a URL

Capitalize every word in a string: `unicorn cake` → `Unicorn Cake`

Escape strings for use as JavaScript string literals

Stringify Object as tree structure

Remove leading indentation from ES6 template literals.

fast string hashing function

Iterate any iterable JS value. Works robustly in all environments, all versions.

Serializes any DOM node into a String

Pluralize a word

Get the line and column number of a specific character in a string

hast utility to get the plain-text value of a node

String manipulation extensions for Underscore.js javascript library.

Lightweight and performant natural sorting of arrays and collections by differentiating between unicode characters, numbers, dates, etc.

Strip a byte order mark (BOM) from a string.

Newline character converter

The color gray, in ansi.

Stringify is to `eval` as `JSON.stringify` is to `JSON.parse`

Returns true if a windows file path has invalid characters.

A simple string template function based on named or indexed arguments

Elegant spinner for interactive CLI apps

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

Parse JavaScript one character at a time to look for snippets in Templates. This is not a validator, it's just designed to allow you to have sections of JavaScript delimited by brackets robustly.

Native JS murmur hash implementation

Advanced URL Connection String parser + generator.

hast utility to get the plain-text value of a node according to the `innerText` algorithm

Check if a character is a whitespace character

Check if a string is SVG

Check if a character is a word character

Simple Module for generating Random Strings

Right pad a string with zeros or a specified string. Fastest implementation.

Find multiple RegExp matches in a string

Jest snapshot serializer that beautifies HTML.

Beautiful color gradients in terminal output

DOMParser.parseFromString for XML with IE8 fallback

Regular expression for matching HTML comments

Opinionated HTML formatter focused towards making HTML diffs readable.

Reduce function calls in a string, using a callback

ES2017 spec-compliant String.prototype.padStart shim.

Check if a string is an IP address

Convert Unicode characters to Latin characters using transliteration

Slugify a string

Various helper utilities for working with buffers and binary data

Pure-JS printf

A robust & optimized `String.fromCodePoint` polyfill, based on the ECMAScript 6 specification.

Returns true if a file path does not contain any invalid characters.

Remove any existing casing from a string.

sprintf parser and basic formatter

The color cyan, in ansi.

ES2019 spec-compliant String.prototype.trimLeft shim.

Returns true if the value passed is all whitespace.

nlcst utility to transform a tree to a string

The color red, in ansi.

Convert a string to space case.

Extensible string utility for converting, identifying and flipping string case

remove diacritics from strings

ES2019 spec-compliant String.prototype.trimLeft shim.

Returns `true` if an array has a glob pattern.

Regular expression for matching email addresses

String encoding utilitlies extracted from TweetNaCl.js

Convert HTML entities to HTML characters, e.g. `>` converts to `>`.

sprintf formatting targetted for CLI

String formatting inspired by Python's str.format()

Math and string formula parser.

[](https://www.npmjs.com/package/levenary) [](https://github.com/tanhauhau/levenary/actions)

Serialises error object to normal object

Lightweight format utility for the browser, based on util.format().

A robust & optimized `String.prototype.codePointAt` polyfill, based on the ECMAScript 6 specification.

Custom formatter that converts any string into Title Case

Convert efficiently index to/from line-column in a string

Regular expression for matching JavaScript comments

Convert a string to camel case.

Returns `true` if a value exists in the given string, array or object.

Test whether a string contains only hexadecimal digits.

A set of string utilities for parsing and assembly

Similar to String#trim() but removes only newlines

Write data to a random temporary file

strings comparison matchers for chai

Zero-dependency unicode-aware string tools

Check if a string is HTML

Replace search occurrences with a replacement string.

Test whether a string contains only alphanumeric characters.

Get a pretty output of the original, minified, gzipped size of a string or buffer: 130 B → 91 B → 53 B (gzip)

This is a temporary package until I can open a pull request on the original. string contains methods that aren't included in the vanilla JavaScript string such as escaping html, decoding html entities, stripping tags, etc.

Predicate that returns true if collection contains unique values.

Pad strings to a given length

Base64 and base64url to string or arraybuffer, and back. Node, Deno or browser.

The fast way to check if a string is blank

Escapes and Unescapes strings into safe literals.

Convert HTML/XML source code or DOM nodes to React elements

Iterator over lines in a string

parses number and unit, '20px' into [20, 'px']

Convert between POSIX and Windows paths.

Consume a stream of data into a binary Buffer as efficiently as possible

Test if a value is a string.

Returns true if the given number is odd, and is an integer that does not exceed the JavaScript MAXIMUM_SAFE_INTEGER.

Insert supplied variable values into a format string.

Tokenize a string into an array of string parts and format identifier objects.

Test if a value is a regular expression string.

Parse parentheses from a string

Escape a regular expression string or pattern.

Convert a camelized/dasherized/underscored string into a humanized one: `fooBar-Baz_Faz` → `Foo bar baz faz`

Generate string from a token array by interpolating values.

Get the length of unicode strings

Get a property from an object using dot (object path) notation.

Convert a string to lowercase.

Create a regular expression from a regular expression string.

A robust & character encoding–agnostic JavaScript implementation of the `Quoted-Printable` content transfer encoding as defined by RFC 2045.

Escape a string for use in AppleScript

easier than regex string matching patterns for urls and other strings. turn strings into data or data into strings.

Allocate a buffer containing a provided string.

Tagged template literal for Sanity.io GROQ-queries

Return a regular expression to parse a regular expression string.

Split string by any separator excluding brackets, quotes and escaped characters

slugifies even utf-8 chars!

Regular expression for matching URLs

parse a css color string

alters a string by replacing multiple range fragments in one fast pass

Convert a string into a stream (streams2)