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

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

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

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

Get the native type of a value.

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

Parse JSON with more helpful errors

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

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

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

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

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.

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

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

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.

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

ES5 spec-compliant shim for String.prototype.trim

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

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).

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

Normalize a URL

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

Compile regular expressions' unicodeSets (v) flag.

Check if array contains unique stringified values

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

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 unique random string

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

Generate a cryptographically strong random string

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

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

Detect the indentation of code

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

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

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

Determine the East Asian Width of a Unicode character

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

mdast utility to get the plain text content of a node

Parse regular expressions' unicodeSets (v) flag.

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

Wildcard matching tools

a few common utility template tags for ES2015

Check if a string has ANSI escape codes

LZ-based compression algorithm

Fastest Levenshtein distance implementation in JS.

Convert object keys to camel case

Parse and stringify URL query strings

Compute ripemd160 of bytes or strings.

Check if a character is decimal

Get the gzipped size of a string or buffer

Check if a character is hexadecimal

Check if a character is alphanumerical

Check if a character is alphabetical

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

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

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

micromark utility to decode markdown strings

Math and string formula parser.

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

Convert object keys from camel case

Convert a string to pascal case (upper camelcase).

Formatting Date objects as strings since 2013

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

Create an array by repeating the given value n times.

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

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

Split a string on the first occurance of a given separator

Isomorphic, functional type-checking for Javascript

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

Convert a string to a valid safe filename

Simple micro templating

Remove wrapping quotes from a string.

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

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

Functional errors with formatted output

Various helper utilities

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

Convert a value to a ReadableStream

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

ES2017 spec-compliant String.prototype.padEnd shim.

Useful utilities for working with Uint8Array (and Buffer)

Terminal string styling with tagged template literals

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

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

Repeat a string - fast

Returns `true` if the value is a primitive.

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

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

Strip a substring from the start/end of a string

Simple wildcard matching

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

The string_decoder module from Node core

Remove the trailing spaces from a string.

UTF-safe string operations

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

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

Check if a string is a URL

Escape strings for use as JavaScript string literals

Remove leading indentation from ES6 template literals.

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

Stringify Object as tree structure

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

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

Serializes any DOM node into a String

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.

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

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

Pluralize a word

A simple string template function based on named or indexed arguments

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.

Advanced URL Connection String parser + generator.

String manipulation extensions for Underscore.js javascript library.

Native JS murmur hash implementation

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

Check if a character is a whitespace character

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

Check if a character is a word character

Elegant spinner for interactive CLI apps

Check if a string is SVG

Find multiple RegExp matches in a string

Reduce function calls in a string, using a callback

Predicate that returns true if collection contains unique values.

DOMParser.parseFromString for XML with IE8 fallback

Simple Module for generating Random Strings

Beautiful color gradients in terminal output

Jest snapshot serializer that beautifies HTML.

Various helper utilities for working with buffers and binary data

Regular expression for matching HTML comments

Opinionated HTML formatter focused towards making HTML diffs readable.

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

Pure-JS printf

Convert Unicode characters to Latin characters using transliteration

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

Remove any existing casing from a string.

Slugify a string

sprintf parser and basic formatter

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

The color cyan, in ansi.

Check if a string is an IP address

ES2017 spec-compliant String.prototype.padStart shim.

Extensible string utility for converting, identifying and flipping string case

The color red, in ansi.

Regular expression for matching email addresses

nlcst utility to transform a tree to a string

Convert a string to space case.

Returns true if the value passed is all whitespace.

ES2019 spec-compliant String.prototype.trimLeft shim.

remove diacritics from strings

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

String encoding utilitlies extracted from TweetNaCl.js

sprintf formatting targetted for CLI

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

Math and string formula parser.

ES2019 spec-compliant String.prototype.trimLeft shim.

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

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

Test whether a string contains only alphanumeric characters.

Serialises error object to normal object

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

Regular expression for matching JavaScript comments

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

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Convert a string to camel case.

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

Custom formatter that converts any string into Title Case

Test whether a string contains only hexadecimal digits.

strings comparison matchers for chai

Write data to a random temporary file

Zero-dependency unicode-aware string tools

Check if a string is HTML

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.

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)

Similar to String#trim() but removes only newlines

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

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

Test if a value is a regular expression string.

Escapes and Unescapes strings into safe literals.

Test if a value is a string.

Insert supplied variable values into a format string.

Escape a regular expression string or pattern.

Iterator over lines in a string

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

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

A set of string utilities for parsing and assembly

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

Parse parentheses from a string

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

Convert between POSIX and Windows paths.

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

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

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

Generate string from a token array by interpolating values.

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

Pad strings to a given length

slugifies even utf-8 chars!

Create a regular expression from a regular expression string.

Get the length of unicode strings

The fast way to check if a string is blank

Return a regular expression to parse a regular expression string.

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

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

Allocate a buffer containing a provided string.

Tagged template literal for Sanity.io GROQ-queries

Regular expression for matching URLs

Strip ANSI color codes from a string. No dependencies.

parse a css color string

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