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.

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

Strip ANSI escape codes from a string

ANSI escape codes for styling strings in the terminal

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.

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

Parse JSON with more helpful errors

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

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

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

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.

Modify strings, generate sourcemaps

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

ANSI escape codes for manipulating the terminal

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

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

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

Slice a string with ANSI escape codes

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

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.

Check if array contains unique stringified values

Parse String to Number based on configuration

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

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.

Querystringify - Small, simple but powerful query string parser.

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

ES5 spec-compliant shim for String.prototype.trim

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

Compile regular expressions' unicodeSets (v) flag.

Truncate a string to a specific width in the terminal

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

Generate a unique random string

Normalize a URL

Strip redundant indentation and indent the string

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

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

Detect the indentation of code

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

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

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

Parse regular expressions' unicodeSets (v) flag.

Determine the East Asian Width of a Unicode character

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

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

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

Wildcard matching tools

LZ-based compression algorithm

Check if a string has ANSI escape codes

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

Fastest Levenshtein distance implementation in JS.

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

mdast utility to get the plain text content of a node

Check if a character is decimal

Compute ripemd160 of bytes or strings.

a few common utility template tags for ES2015

Convert object keys to camel case

Check if a character is alphabetical

Check if a character is hexadecimal

Parse and stringify URL query strings

Get the gzipped size of a string or buffer

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

Math and string formula parser.

micromark utility to decode markdown strings

Check if a character is alphanumerical

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

Create an array by repeating the given value n times.

Formatting Date objects as strings since 2013

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

Get the system locale

Isomorphic, functional type-checking for Javascript

Split a string on the first occurance of a given separator

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

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

Convert a string index to its line and column position

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

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

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

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

Various helper utilities

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

Convert a string to a valid safe filename

Simple micro templating

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

Functional errors with formatted output

Remove wrapping quotes from a string.

Repeat a string - fast

Convert a value to a ReadableStream

Useful utilities for working with Uint8Array (and Buffer)

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

Returns `true` if the value is a primitive.

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

Strip a substring from the start/end of a string

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

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

Remove the trailing spaces from a string.

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

Simple wildcard matching

UTF-safe string operations

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

Check if a string is a URL

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

Escape strings for use as JavaScript string literals

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

The color gray, in ansi.

Stringify Object as tree structure

Remove leading indentation from ES6 template literals.

The string_decoder module from Node core

Returns true if a windows file path has invalid characters.

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

Pluralize a word

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

fast string hashing function

Serializes any DOM node into a String

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

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

Newline character converter

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

String manipulation extensions for Underscore.js javascript library.

A simple string template function based on named or indexed arguments

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.

Elegant spinner for interactive CLI apps

Native JS murmur hash implementation

Reduce function calls in a string, using a callback

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

Check if a character is a whitespace character

Beautiful color gradients in terminal output

Advanced URL Connection String parser + generator.

DOMParser.parseFromString for XML with IE8 fallback

Regular expression for matching HTML comments

Simple Module for generating Random Strings

Check if a character is a word character

Check if a string is SVG

Find multiple RegExp matches in a string

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

Jest snapshot serializer that beautifies HTML.

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

Remove any existing casing from a string.

sprintf parser and basic formatter

Opinionated HTML formatter focused towards making HTML diffs readable.

Check if a string is an IP address

Various helper utilities for working with buffers and binary data

The color cyan, in ansi.

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

ES2017 spec-compliant String.prototype.padStart shim.

Convert Unicode characters to Latin characters using transliteration

Slugify a string

Pure-JS printf

nlcst utility to transform a tree to a string

Convert a string to space case.

remove diacritics from strings

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

Regular expression for matching email addresses

ES2019 spec-compliant String.prototype.trimLeft shim.

Math and string formula parser.

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

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

sprintf formatting targetted for CLI

Regular expression for matching JavaScript comments

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)

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

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.

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

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

Zero-dependency unicode-aware string tools

Test whether a string contains only hexadecimal digits.

Custom formatter that converts any string into Title Case

Write data to a random temporary file

Convert a string to camel case.

Check if a string is HTML

Similar to String#trim() but removes only newlines

strings comparison matchers for chai

A set of string utilities for parsing and assembly

Replace search occurrences with a replacement string.

Test whether a string contains only alphanumeric characters.

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

Escapes and Unescapes strings into safe literals.

Test if a value is a regular expression string.

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

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

Predicate that returns true if collection contains unique values.

Escape a string for use in AppleScript

Pad strings to a given length

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

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

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

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

Convert between POSIX and Windows paths.

The fast way to check if a string is blank

Iterator over lines in 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.

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

Insert supplied variable values into a format string.

Create a regular expression from a regular expression string.

Test if a value is a string.

Escape a regular expression string or pattern.

Parse parentheses from a string

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

Strip ANSI color codes from a string. No dependencies.

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

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

Regular expression for matching URLs

Tagged template literal for Sanity.io GROQ-queries

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

More than 130 Handlebars helpers in ~20 categories. Helpers can be used with Assemble, Generate, Verb, Ghost, gulp-handlebars, grunt-handlebars, consolidate, or any node.js/Handlebars project.

Allocate a buffer containing a provided string.

Convert a string to lowercase.

slugifies even utf-8 chars!