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

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.

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

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

Parse JSON with more helpful errors

Given some data, jsesc returns the shortest possible stringified & ASCII-safe representation of that data.

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`

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.

Strip the final newline character from a string or Uint8Array

Returns true if a string has an extglob.

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

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

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

Slice a string with ANSI escape codes

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

Indent each line in a string

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.

ES5 spec-compliant shim for String.prototype.trim

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

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

Parse String to Number based on configuration

Measure the difference between two strings using the Levenshtein distance algorithm

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

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

Querystringify - Small, simple but powerful query string parser.

Check if array contains unique stringified values

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 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

Strip redundant indentation and indent the string

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

Normalize a URL

Generate a unique random 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 cryptographically strong random string

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.

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.

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

Determine the East Asian Width of a Unicode character

mdast utility to get the plain text content of a node

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

Parse regular expressions' unicodeSets (v) flag.

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

a few common utility template tags for ES2015

LZ-based compression algorithm

Wildcard matching tools

Check if a string has ANSI escape codes

Fastest Levenshtein distance implementation in JS.

Parse and stringify URL query strings

Check if a character is decimal

Compute ripemd160 of bytes or strings.

Convert object keys to camel case

Check if a character is hexadecimal

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

Math and string formula parser.

Get the gzipped size of a string or buffer

Check if a character is alphabetical

Check if a character is alphanumerical

micromark utility to decode markdown strings

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).

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

Create an array by repeating the given value n times.

Formatting Date objects as strings since 2013

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

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

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

Get the system locale

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

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

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

Various helper utilities

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Functional errors with formatted output

Useful utilities for working with Uint8Array (and Buffer)

Convert a value to a ReadableStream

Repeat a string - fast

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

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

Returns `true` if the value is a primitive.

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

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

The string_decoder module from Node core

Strip a substring from the start/end of a string

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

Remove the trailing spaces from a string.

UTF-safe string operations

Simple wildcard matching

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

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

Stringify Object as tree structure

Check if a string is a URL

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

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

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

Escape strings for use as JavaScript string literals

The color gray, in ansi.

Remove leading indentation from ES6 template literals.

Returns true if a windows file path has invalid characters.

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

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

Pluralize a word

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

Serializes any DOM node into a String

fast string hashing function

Newline character converter

A simple string template function based on named or indexed arguments

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

String manipulation extensions for Underscore.js javascript library.

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.

Check if a character is a whitespace character

Native JS murmur hash implementation

Elegant spinner for interactive CLI apps

Advanced URL Connection String parser + generator.

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

Reduce function calls in a string, using a callback

Check if a string is SVG

Find multiple RegExp matches in a string

Beautiful color gradients in terminal output

Regular expression for matching HTML comments

Check if a character is a word character

DOMParser.parseFromString for XML with IE8 fallback

Simple Module for generating Random Strings

Jest snapshot serializer that beautifies HTML.

Pure-JS printf

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

Opinionated HTML formatter focused towards making HTML diffs readable.

Convert Unicode characters to Latin characters using transliteration

Remove any existing casing from a string.

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

sprintf parser and basic formatter

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

Various helper utilities for working with buffers and binary data

Check if a string is an IP address

The color cyan, in ansi.

Slugify a string

The color red, in ansi.

Extensible string utility for converting, identifying and flipping string case

ES2017 spec-compliant String.prototype.padStart shim.

remove diacritics from strings

ES2019 spec-compliant String.prototype.trimLeft shim.

Regular expression for matching email addresses

Returns true if the value passed is all whitespace.

nlcst utility to transform a tree to a string

Convert a string to space case.

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

sprintf formatting targetted for CLI

String encoding utilitlies extracted from TweetNaCl.js

Math and string formula parser.

ES2019 spec-compliant String.prototype.trimLeft shim.

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

Test whether a string contains only alphanumeric characters.

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

Regular expression for matching JavaScript comments

Serialises error object to normal object

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

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

Test whether a string contains only hexadecimal digits.

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

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

Custom formatter that converts any string into Title Case

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.

Zero-dependency unicode-aware string tools

Write data to a random temporary file

Convert a string to camel case.

strings comparison matchers for chai

Check if a string is HTML

Replace search occurrences with a replacement string.

Similar to String#trim() but removes only newlines

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

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

Test if a value is a string.

Insert supplied variable values into a format string.

Test if a value is a regular expression string.

Escape a regular expression string or pattern.

A set of string utilities for parsing and assembly

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

Escapes and Unescapes strings into safe literals.

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

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

Convert between POSIX and Windows paths.

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

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

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.

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.

Pad strings to a given length

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

Create a regular expression from a regular expression string.

Predicate that returns true if collection contains unique values.

Iterator over lines in a string

slugifies even utf-8 chars!

The fast way to check if a string is blank

Parse parentheses from a string

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

Tagged template literal for Sanity.io GROQ-queries

Get the length of unicode strings

Regular expression for matching URLs

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

Generate string from a token array by interpolating values.

Allocate a buffer containing a provided string.

Detect the indentation of code (commonjs fork)

Strip ANSI color codes from a string. No dependencies.

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

Return a regular expression to parse a regular expression string.