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

The string_decoder module from Node core

Contains some util methods for converting numbers into words, ordinal words and ordinal numbers.

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.

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

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

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

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

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

ANSI escape codes for manipulating the terminal

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

Strip the final newline character from a string or Uint8Array

Returns true if a string has an extglob.

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

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

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

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.

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

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.

ES5 spec-compliant shim for String.prototype.trim

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.

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

Truncate a string to a specific width in the terminal

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

Compile regular expressions' unicodeSets (v) flag.

Strip redundant indentation and indent the string

Normalize a URL

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

Generate a unique random string

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

Generate a cryptographically strong 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

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

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.

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

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

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

Determine the East Asian Width of a Unicode character

mdast utility to get the plain text content of a node

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

Check if a string has ANSI escape codes

Fastest Levenshtein distance implementation in JS.

a few common utility template tags for ES2015

Parse regular expressions' unicodeSets (v) flag.

Wildcard matching tools

LZ-based compression algorithm

Parse and stringify URL query strings

Check if a character is decimal

Convert object keys to camel case

Check if a character is hexadecimal

Compute ripemd160 of bytes or strings.

Get the gzipped size of a string or buffer

Check if a character is alphanumerical

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.

Check if a character is alphabetical

Convert a string to pascal case (upper camelcase).

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

Convert object keys from camel case

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

micromark utility to decode markdown strings

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

Formatting Date objects as strings since 2013

Create an array by repeating the given value n times.

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

Split a string on the first occurance of a given separator

Get the system locale

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

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

Convert a string index to its line and column position

Simple micro templating

Convert a string to a valid safe filename

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

Functional errors with formatted output

Useful utilities for working with Uint8Array (and Buffer)

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Convert a value to a ReadableStream

Repeat a string - fast

ES2017 spec-compliant String.prototype.padEnd shim.

Check if array contains unique stringified values

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

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.

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

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

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

Strip a substring from the start/end of a string

UTF-safe string operations

Remove the trailing spaces from a string.

The string_decoder module from Node core

Simple wildcard matching

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

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

Stringify Object as tree structure

Fuzzy filtering and string similarity scoring - compatible with fuzzaldrin

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

Check if a string is a URL

Escape strings for use as JavaScript string literals

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

The color gray, in ansi.

Remove leading indentation from ES6 template literals.

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

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

Returns true if a windows file path has invalid characters.

Serializes any DOM node into a String

Pluralize a word

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

A simple string template function based on named or indexed arguments

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

Newline character converter

fast string hashing function

String manipulation extensions for Underscore.js javascript library.

Check if a character is a whitespace character

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

Advanced URL Connection String parser + generator.

Check if a string is SVG

Elegant spinner for interactive CLI apps

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

Find multiple RegExp matches in a string

Check if a character is a word character

Regular expression for matching HTML comments

Reduce function calls in a string, using a callback

Simple Module for generating Random Strings

Opinionated HTML formatter focused towards making HTML diffs readable.

Beautiful color gradients in terminal output

DOMParser.parseFromString for XML with IE8 fallback

Jest snapshot serializer that beautifies HTML.

Pure-JS printf

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

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.

Slugify a string

The color cyan, in ansi.

ES2019 spec-compliant String.prototype.trimLeft shim.

ES2017 spec-compliant String.prototype.padStart shim.

Check if a string is an IP address

The color red, in ansi.

Extensible string utility for converting, identifying and flipping string case

Various helper utilities for working with buffers and binary data

remove diacritics from strings

Regular expression for matching email addresses

Returns true if the value passed is all whitespace.

ES2019 spec-compliant String.prototype.trimLeft shim.

String encoding utilitlies extracted from TweetNaCl.js

Convert a string to space case.

nlcst utility to transform a tree to a string

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

sprintf formatting targetted for CLI

Math and string formula parser.

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

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

Serialises error object to normal object

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

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

Regular expression for matching JavaScript comments

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

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

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

Write data to a random temporary file

Test whether a string contains only hexadecimal digits.

Convert a string to camel case.

Custom formatter that converts any string into Title Case

Zero-dependency unicode-aware string tools

Similar to String#trim() but removes only newlines

strings comparison matchers for chai

A set of string utilities for parsing and assembly

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

Check if a string is HTML

Replace search occurrences with a replacement string.

Test whether a string contains only alphanumeric characters.

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.

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

Test if a value is a string.

Test if a value is a regular expression string.

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

Insert supplied variable values into a format string.

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

Predicate that returns true if collection contains unique values.

Escape a regular expression string or pattern.

Convert between POSIX and Windows paths.

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

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

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

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

Escape a string for use in AppleScript

Iterator over lines in a string

Get the length of unicode strings

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

Create a regular expression from a regular expression string.

Parse parentheses from a string

slugifies even utf-8 chars!

Generate string from a token array by interpolating values.

Regular expression for matching URLs

The fast way to check if a string is blank

Allocate a buffer containing a provided string.

Pad strings to a given length

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

Tagged template literal for Sanity.io GROQ-queries

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

Return a regular expression to parse a regular expression string.

Strip ANSI color codes from a string. No dependencies.

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

Detect the indentation of code (commonjs fork)

Convert a string into a stream (streams2)