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.

Throws an error if a string is found.

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

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

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

The string_decoder module from Node core

Functions for dealing with a PostgresSQL connection string

A plain text serializer for Slate editors.

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

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.

ANSI escape codes for styling strings in the terminal

Strip ANSI escape codes from a string

Regular expression for matching ANSI escape codes

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

Terminal string styling done right

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

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

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

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

ANSI escape codes for manipulating the terminal

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

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

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.

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

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

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

Indent each line in a string

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

Measure the difference between two strings using the Levenshtein distance algorithm

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

Check if array contains unique stringified values

Parse String to Number based on configuration

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

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).

Strip leading whitespace from each line in a string

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

ES5 spec-compliant shim for String.prototype.trim

Querystringify - Small, simple but powerful query string parser.

Truncate a string to a specific width in the terminal

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

Normalize a URL

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

Compile regular expressions' unicodeSets (v) flag.

Get the shortest leading whitespace from lines in a string

Strip redundant indentation and indent the string

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

Generate a cryptographically strong random string

Generate a unique random string

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

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

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.

Detect the indentation of code

Fastest Levenshtein distance implementation in JS.

LZ-based compression algorithm

Determine the East Asian Width of a Unicode character

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

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

Check if a character is decimal

Check if a string has ANSI escape codes

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

Wildcard matching tools

mdast utility to get the plain text content of a node

Convert object keys to camel case

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

a few common utility template tags for ES2015

Compute ripemd160 of bytes or strings.

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

Math and string formula parser.

Check if a character is alphabetical

Get the gzipped size of a string or buffer

Check if a character is hexadecimal

Parse and stringify URL query strings

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

Check if a character is alphanumerical

micromark utility to decode markdown strings

Create an array by repeating the given value n times.

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

Convert a string to pascal case (upper camelcase).

Convert object keys from camel case

Split a string on the first occurance of a given separator

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

Formatting Date objects as strings since 2013

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

Isomorphic, functional type-checking for Javascript

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

Get the system locale

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

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

Convert a string index to its line and column position

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

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

Various helper utilities

Useful utilities for working with Uint8Array (and Buffer)

Convert a string to a valid safe filename

Simple micro templating

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

Functional errors with formatted output

Remove wrapping quotes from a string.

Repeat a string - fast

Convert a value to a ReadableStream

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

ES2017 spec-compliant String.prototype.padEnd shim.

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

Terminal string styling with tagged template literals

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

Returns `true` if the value is a primitive.

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

Strip a substring from the start/end of a string

Remove the trailing spaces from a string.

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

UTF-safe string operations

Simple wildcard matching

Stringify Object as tree structure

Check if a string is a URL

Escape strings for use as JavaScript string literals

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

The string_decoder module from Node core

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

Remove leading indentation from ES6 template literals.

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

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

Serializes any DOM node into a String

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

fast string hashing function

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

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

Pluralize a word

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

The color gray, in ansi.

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

Returns true if a windows file path has invalid characters.

String manipulation extensions for Underscore.js javascript library.

A simple string template function based on named or indexed arguments

Newline character converter

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

Elegant spinner for interactive CLI apps

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

Advanced URL Connection String parser + generator.

Check if a character is a whitespace character

Check if a character is a word character

DOMParser.parseFromString for XML with IE8 fallback

Simple Module for generating Random Strings

Check if a string is SVG

Find multiple RegExp matches in a string

Beautiful color gradients in terminal output

Jest snapshot serializer that beautifies HTML.

Regular expression for matching HTML comments

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

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

Reduce function calls in a string, using a callback

Opinionated HTML formatter focused towards making HTML diffs readable.

Various helper utilities for working with buffers and binary data

Check if a string is an IP address

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

Slugify a string

ES2017 spec-compliant String.prototype.padStart shim.

Convert Unicode characters to Latin characters using transliteration

Pure-JS printf

Remove any existing casing from a string.

remove diacritics from strings

sprintf parser and basic formatter

nlcst utility to transform a tree to a string

The color cyan, in ansi.

Convert a string to space case.

Math and string formula parser.

Returns true if the value passed is all whitespace.

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

The color red, in ansi.

Extensible string utility for converting, identifying and flipping string case

ES2019 spec-compliant String.prototype.trimLeft shim.

String encoding utilitlies extracted from TweetNaCl.js

ES2019 spec-compliant String.prototype.trimLeft shim.

Regular expression for matching email addresses

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

Regular expression for matching JavaScript comments

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

sprintf formatting targetted for CLI

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

Test whether a string contains only hexadecimal digits.

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

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

Serialises error object to normal object

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

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.

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

Custom formatter that converts any string into Title Case

Test whether a string contains only alphanumeric characters.

Convert a string to camel case.

Write data to a random temporary file

strings comparison matchers for chai

Similar to String#trim() but removes only newlines

Check if a string is HTML

Zero-dependency unicode-aware string tools

A set of string utilities for parsing and assembly

Escapes and Unescapes strings into safe literals.

Replace search occurrences with a replacement string.

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

Convert between POSIX and Windows paths.

Predicate that returns true if collection contains unique values.

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

Create a regular expression from a regular expression string.

Pad strings to a given length

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

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

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

Iterator over lines in a string

Tagged template literal for Sanity.io GROQ-queries

Test if a value is a regular expression string.

The fast way to check if a string is blank

Regular expression for matching URLs

Parse parentheses from a string

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

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.

Test if a value is a string.

Escape a regular expression string or pattern.

Generate string from a token array by interpolating values.

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

Escape a string for use in AppleScript

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

Get the length of unicode strings

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

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

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

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

Return a regular expression to parse a regular expression string.

Convert a string to lowercase.

slugifies even utf-8 chars!

Allocate a buffer containing a provided string.

parse a css color string

Converts a Buffer/String into a readable stream