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.

ANSI escape codes for styling strings in the terminal

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

Regular expression for matching ANSI escape codes

Strip ANSI escape codes from a string

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

Terminal string styling done right

Wordwrap a string with ANSI escape codes

Escape RegExp special characters

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

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

Parse JSON with more helpful errors

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.

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.

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

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

Indent each line in a string

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

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

Measure the difference between two strings using the Levenshtein distance algorithm

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

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

Parse String to Number based on configuration

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 robust HTML entities encoder/decoder with full Unicode support.

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

Truncate a string to a specific width in the terminal

Querystringify - Small, simple but powerful query string parser.

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

Normalize a URL

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

Strip redundant indentation and indent the string

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.

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

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.

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

Parse regular expressions' unicodeSets (v) flag.

Fastest Levenshtein distance implementation in JS.

Detect the indentation of code

LZ-based compression algorithm

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

Determine the East Asian Width of a Unicode character

Check if a character is decimal

Check if a string has ANSI escape codes

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

mdast utility to get the plain text content of a node

Compute ripemd160 of bytes or strings.

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

a few common utility template tags for ES2015

Wildcard matching tools

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

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.

Math and string formula parser.

Check if a character is alphabetical

Parse and stringify URL query strings

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

Check if a character is hexadecimal

Get the gzipped size of a string or buffer

micromark utility to decode markdown strings

Check if a character is alphanumerical

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 object keys from camel case

Convert a string to pascal case (upper camelcase).

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.

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

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

Get the system locale

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

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

Various helper utilities

Convert a string to a valid safe filename

Useful utilities for working with Uint8Array (and Buffer)

Simple micro templating

Functional errors with formatted output

Remove wrapping quotes from a string.

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

Repeat a string - fast

Convert a value to a ReadableStream

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Check if array contains unique stringified values

ES2017 spec-compliant String.prototype.padEnd shim.

Terminal string styling with tagged template literals

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

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

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

Remove the trailing spaces from a string.

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

Simple wildcard matching

Stringify Object as tree structure

Check if a string is a URL

UTF-safe string operations

Escape strings for use as JavaScript string literals

The string_decoder module from Node core

Remove leading indentation from ES6 template literals.

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

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

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

fast string hashing function

Serializes any DOM node into a String

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

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

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

Pluralize a word

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

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

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

String manipulation extensions for Underscore.js javascript library.

The color gray, in ansi.

Returns true if a windows file path has invalid characters.

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.

Newline character converter

A simple string template function based on named or indexed arguments

Elegant spinner for interactive CLI apps

Native JS murmur hash implementation

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

Check if a character is a whitespace character

Simple Module for generating Random Strings

DOMParser.parseFromString for XML with IE8 fallback

Advanced URL Connection String parser + generator.

Check if a character is a word character

Jest snapshot serializer that beautifies HTML.

Check if a string is SVG

Beautiful color gradients in terminal output

Find multiple RegExp matches in a string

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.

Check if a string is an IP address

Various helper utilities for working with buffers and binary data

Convert Unicode characters to Latin characters using transliteration

Slugify a string

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

Pure-JS printf

ES2017 spec-compliant String.prototype.padStart shim.

remove diacritics from strings

Remove any existing casing from a string.

sprintf parser and basic formatter

nlcst utility to transform a tree to a string

Convert a string to space case.

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

The color cyan, in ansi.

Math and string formula parser.

The color red, in ansi.

Returns true if the value passed is all whitespace.

Extensible string utility for converting, identifying and flipping string case

ES2019 spec-compliant String.prototype.trimLeft shim.

ES2019 spec-compliant String.prototype.trimLeft shim.

String encoding utilitlies extracted from TweetNaCl.js

Regular expression for matching email addresses

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

sprintf formatting targetted for CLI

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

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

Regular expression for matching JavaScript comments

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

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

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Serialises error object to normal object

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 hexadecimal digits.

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

Zero-dependency unicode-aware string tools

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.

Escapes and Unescapes strings into safe literals.

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)

Replace search occurrences with a replacement string.

Convert between POSIX and Windows paths.

A set of string utilities for parsing and assembly

Create a regular expression from a regular expression string.

Predicate that returns true if collection contains unique values.

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

Pad strings to a given length

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

Tagged template literal for Sanity.io GROQ-queries

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

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

Regular expression for matching URLs

The fast way to check if a string is blank

Escape a regular expression string or pattern.

Iterator over lines in a string

Test if a value is a string.

Insert supplied variable values into a format string.

Test if a value is a regular expression string.

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

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

Generate string from a token array by interpolating values.

Parse parentheses from a string

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

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

Get the length of unicode strings

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.

slugifies even utf-8 chars!

Convert a string to lowercase.

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

Allocate a buffer containing a provided string.

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

Return a regular expression to parse a regular expression string.

Simple implmentation of Stream.Readable and Stream.Writable holding the data in memory.

Converts a Buffer/String into a readable stream