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.

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

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

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

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.

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

Modify strings, generate sourcemaps

Strip the final newline character from a string or Uint8Array

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

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.

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

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

Indent each line in a string

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.

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

Measure the difference between two strings using the Levenshtein distance algorithm

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

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

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 robust HTML entities encoder/decoder with full Unicode support.

Querystringify - Small, simple but powerful query string parser.

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

ES5 spec-compliant shim for String.prototype.trim

Truncate a string to a specific width in the terminal

Strip redundant indentation and indent the string

Compile regular expressions' unicodeSets (v) flag.

Normalize a URL

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

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

Detect the indentation of code

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

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

Parse regular expressions' unicodeSets (v) flag.

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

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

Fastest Levenshtein distance implementation in JS.

LZ-based compression algorithm

Determine the East Asian Width of a Unicode character

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

Wildcard matching tools

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

Check if a character is decimal

Check if a string has ANSI escape codes

Check if a character is hexadecimal

mdast utility to get the plain text content of a node

Convert object keys to camel case

Compute ripemd160 of bytes or strings.

a few common utility template tags for ES2015

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

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

Get the gzipped size of a string or buffer

Parse and stringify URL query strings

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

Check if a character is alphanumerical

micromark utility to decode markdown strings

Convert a string to pascal case (upper camelcase).

Convert object keys from camel case

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.

Formatting Date objects as strings since 2013

Split a string on the first occurance of a given separator

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

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

Get the system locale

Isomorphic, functional type-checking for Javascript

Convert a string index to its line and column position

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

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

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

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

Various helper utilities

Useful utilities for working with Uint8Array (and Buffer)

Convert a string to a valid safe filename

Simple micro templating

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

Functional errors with formatted output

Remove wrapping quotes from a string.

Repeat a string - fast

Convert a value to a ReadableStream

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

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

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

Returns `true` if the value is a primitive.

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

Strip a substring from the start/end of a string

Remove the trailing spaces from a string.

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

UTF-safe string operations

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

Simple wildcard matching

Stringify Object as tree structure

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

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

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

Remove leading indentation from ES6 template literals.

The string_decoder module from Node core

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

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

The color gray, in ansi.

Returns true if a windows file path has invalid characters.

A simple string template function based on named or indexed arguments

Serializes any DOM node into a String

fast string hashing function

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

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

Pluralize a word

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

String manipulation extensions for Underscore.js javascript library.

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.

Native JS murmur hash implementation

Elegant spinner for interactive CLI apps

Check if a string is SVG

Find multiple RegExp matches in a string

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

Advanced URL Connection String parser + generator.

Check if a character is a whitespace character

Check if a character is a word character

Opinionated HTML formatter focused towards making HTML diffs readable.

Reduce function calls in a string, using a callback

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.

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.

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

Various helper utilities for working with buffers and binary data

Remove any existing casing from a string.

sprintf parser and basic formatter

Check if a string is an IP address

Slugify a string

ES2017 spec-compliant String.prototype.padStart shim.

Convert Unicode characters to Latin characters using transliteration

The color cyan, in ansi.

Pure-JS printf

remove diacritics from strings

Returns true if the value passed is all whitespace.

Regular expression for matching email addresses

nlcst utility to transform a tree to a string

String encoding utilitlies extracted from TweetNaCl.js

Convert a string to space case.

Math and string formula parser.

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.

ES2019 spec-compliant String.prototype.trimLeft shim.

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

Regular expression for matching JavaScript comments

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

Serialises error object to normal object

sprintf formatting targetted for CLI

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

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

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

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

Test whether a string contains only hexadecimal digits.

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

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.

Write data to a random temporary file

Custom formatter that converts any string into Title Case

Zero-dependency unicode-aware string tools

Convert a string to camel case.

Test whether a string contains only alphanumeric characters.

strings comparison matchers for chai

Similar to String#trim() but removes only newlines

Check if a string is HTML

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

A set of string utilities for parsing and assembly

Replace search occurrences with a replacement string.

Escapes and Unescapes strings into safe literals.

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

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

Convert between POSIX and Windows paths.

Test if a value is a regular expression 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.

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

Predicate that returns true if collection contains unique values.

Create a regular expression from a regular expression string.

Pad strings to a given length

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

Iterator over lines in a string

Get the length of unicode strings

Escape a string for use in AppleScript

The fast way to check if a string is blank

Tagged template literal for Sanity.io GROQ-queries

Regular expression for matching URLs

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

Parse parentheses from a string

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

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

Insert supplied variable values into a format string.

Allocate a buffer containing a provided string.

Generate string from a token array by interpolating values.

Test if a value is a string.

Escape a regular expression string or pattern.

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

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

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

small function to append a query string to a URL

Return a regular expression to parse a regular expression string.

Strip ANSI color codes from a string. No dependencies.

Convert a string to lowercase.

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