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

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

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

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.

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

Modify strings, generate sourcemaps

ANSI escape codes for manipulating the terminal

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

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

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

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

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.

Indent each line in a string

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

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.

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

Parse String to Number based on configuration

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

ES5 spec-compliant shim for String.prototype.trim

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).

Measure the difference between two strings using the Levenshtein distance algorithm

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

Querystringify - Small, simple but powerful query string parser.

Strip leading whitespace from each line in a string

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

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

Normalize a URL

Truncate a string to a specific width in the terminal

Strip redundant indentation and indent the string

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

Compile regular expressions' unicodeSets (v) flag.

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

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

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

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

Detect the indentation of code

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

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

Determine the East Asian Width of a Unicode character

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

Check if a string has ANSI escape codes

mdast utility to get the plain text content of a node

Parse regular expressions' unicodeSets (v) flag.

Fastest Levenshtein distance implementation in JS.

LZ-based compression algorithm

a few common utility template tags for ES2015

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

Wildcard matching tools

Compute ripemd160 of bytes or strings.

Convert object keys to camel case

Check if a character is decimal

Parse and stringify URL query strings

Check if a character is hexadecimal

Get the gzipped size of a string or buffer

Check if a character is alphanumerical

micromark utility to decode markdown strings

Check if a character is alphabetical

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

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

Math and string formula parser.

Convert a string to pascal case (upper camelcase).

Convert object keys from camel case

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

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

Create an array by repeating the given value n times.

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.

Split a string on the first occurance of a given separator

Isomorphic, functional type-checking for Javascript

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

Get the system locale

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

Convert a string index to its line and column position

Simple micro templating

Convert a string to a valid safe filename

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

Remove wrapping quotes from a string.

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

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

Functional errors with formatted output

Various helper utilities

Convert a value to a ReadableStream

ES2017 spec-compliant String.prototype.padEnd shim.

Useful utilities for working with Uint8Array (and Buffer)

Repeat a string - fast

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

Terminal string styling with tagged template literals

Returns `true` if the value is a primitive.

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

Check if array contains unique stringified values

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

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

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

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

Strip a substring from the start/end of a string

UTF-safe string operations

Simple wildcard matching

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

Escape strings for use as JavaScript string literals

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

Remove leading indentation from ES6 template literals.

Stringify Object as tree structure

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

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

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

Serializes any DOM node into a String

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.

Pluralize a word

The color gray, in ansi.

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

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

A simple string template function based on named or indexed arguments

Returns true if a windows file path has invalid characters.

fast string hashing function

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.

String manipulation extensions for Underscore.js javascript library.

Native JS murmur hash implementation

Check if a character is a whitespace character

Advanced URL Connection String parser + generator.

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

Elegant spinner for interactive CLI apps

Check if a string is SVG

Simple Module for generating Random Strings

Check if a character is a word character

Find multiple RegExp matches in a string

DOMParser.parseFromString for XML with IE8 fallback

Regular expression for matching HTML comments

Jest snapshot serializer that beautifies HTML.

Beautiful color gradients in terminal output

Opinionated HTML formatter focused towards making HTML diffs readable.

Reduce function calls in a string, using a callback

Pure-JS printf

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

Convert Unicode characters to Latin characters using transliteration

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

Slugify a string

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

Remove any existing casing from a string.

sprintf parser and basic formatter

Various helper utilities for working with buffers and binary data

Check if a string is an IP address

ES2017 spec-compliant String.prototype.padStart shim.

ES2019 spec-compliant String.prototype.trimLeft shim.

The color cyan, in ansi.

Convert a string to space case.

nlcst utility to transform a tree to a string

The color red, in ansi.

Regular expression for matching email addresses

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

Returns true if the value passed is all whitespace.

Extensible string utility for converting, identifying and flipping string case

remove diacritics from strings

String encoding utilitlies extracted from TweetNaCl.js

ES2019 spec-compliant String.prototype.trimLeft shim.

sprintf formatting targetted for CLI

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

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

Math and string formula parser.

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

Serialises error object to normal object

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

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

Regular expression for matching JavaScript comments

Write data to a random temporary file

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

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

Test whether a string contains only hexadecimal digits.

Convert a string to camel case.

Custom formatter that converts any string into Title Case

Similar to String#trim() but removes only newlines

strings comparison matchers for chai

Check if a string is HTML

Zero-dependency unicode-aware string tools

A set of string utilities for parsing and assembly

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

Replace search occurrences with a replacement string.

Test whether a string contains only alphanumeric characters.

Escapes and Unescapes strings into safe literals.

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.

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

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

Predicate that returns true if collection contains unique values.

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

Test if a value is a string.

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

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

Insert supplied variable values into a format string.

Escape a regular expression string or pattern.

Test if a value is a regular expression string.

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

Convert between POSIX and Windows paths.

Iterator over lines in a string

Get the length of unicode strings

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

Parse parentheses from a string

Generate string from a token array by interpolating values.

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

Create a regular expression from a regular expression string.

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

Escape a string for use in AppleScript

Pad strings to a given length

The fast way to check if a string is blank

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

slugifies even utf-8 chars!

Allocate a buffer containing a provided string.

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

Regular expression for matching URLs

Tagged template literal for Sanity.io GROQ-queries

Return a regular expression to parse a regular expression string.

Converts a Buffer/String into a readable stream

Convert a string into a stream (streams2)

parse a css color string

Convert a string to lowercase.