JSPM

Helps with complex printf-style formatting

A Typescript formatting library inspired by c# string.format("My {0} string", "Hello World")

Dead simple string formatting

Utilities for transforming and formatting text (i.e. strings)

Python string formatting mini-language, transcoded from Jython.

Functional-ish JavaScript string formatting, with inspirations from Python.

Modify strings, generate sourcemaps

Esoteric string formatting

Simple Python-style string formatting for JS

Apply flexible numeric masks to any string. Perfect for phone numbers, documents, and custom input formatting.

A collection of useful string formatting utilities

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

Java's String.format() compatible string formatting library for JavaScript.

Wordwrap a string with ANSI escape codes

A comprehensive collection of TypeScript/JavaScript utility functions for common programming tasks. Includes validation, object manipulation, date handling, string formatting, and more. Zero dependencies, fully typed, and optimized for performance.

ANSI escape codes for manipulating the terminal

Slice a string with 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).

String Formatting for JavaScript

Opinionated HTML formatter focused towards making HTML diffs readable.

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

A collection of personal utilities to live a happier life

Easy string formatting script

A lightweight and powerful utility library for advanced string manipulation, case conversion, and formatting.

Simple micro templating

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

Terminal string styling with tagged template literals

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

Escape RegExp special characters

Get the native type of a value.

The color gray, in ansi.

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

The string_decoder module from Node core

Newline character converter

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`

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

Beautiful color gradients in terminal output

Returns true if a string has an extglob.

Strip the final newline character from a string or Uint8Array

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

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

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.

Indent each line in a string

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.

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

The color red, in ansi.

The color cyan, in ansi.

`JsSimpleDateFormat` is for formatting and parsing date-time and duration. It formats a `Date` object to be a string as the defined pattern. It can also parse a string to be a `Date` object based on the defined pattern. It supports the pattern which is

Parse String to Number based on configuration

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

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

ES5 spec-compliant shim for String.prototype.trim

Measure the difference between two strings using the Levenshtein distance algorithm

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

Querystringify - Small, simple but powerful query string parser.

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

Normalize a URL

Strip redundant indentation and indent the string

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.

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

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

Generate a unique random string

Strips ANSI Control Characters from string or stream

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

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

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.

Detect the indentation of code

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

Determine the East Asian Width of a Unicode character

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

Check if a string has ANSI escape codes

mdast utility to get the plain text content of a node

Functions for dealing with a PostgresSQL connection string

a few common utility template tags for ES2015

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

Fastest Levenshtein distance implementation in JS.

Parse regular expressions' unicodeSets (v) flag.

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

Wildcard matching tools

LZ-based compression algorithm

Convert object keys to camel case

Parse and stringify URL query strings

Generate string from a token array by interpolating values.

Check if a character is hexadecimal

Check if a character is decimal

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.

Convert a string to pascal case (upper camelcase).

Check if a character is alphabetical

Math and string formula parser.

Convert object keys from camel case

micromark utility to decode markdown strings

Strip ANSI color codes from a string. No dependencies.

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

Library of miscellaneous formatting and helper functions

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.

Isomorphic, functional type-checking for Javascript

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

The color green, in ansi.

Split a string on the first occurance of a given separator

The color grey, in ansi.

The color dim, in ansi.

Get the system locale

Cross-platform success symbol.

The color yellow, in ansi.

The color bgmagenta, in ansi.

The color blue, in ansi.

The color bgcyan, in ansi.

Cross-platform error symbol.

Convert a string index to its line and column position

The color bgred, in ansi.

The color bgwhite, in ansi.

The color inverse, in ansi.

Cross-platform warning symbol.

Convert a string to a valid safe filename

The color bold, in ansi.

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

The color bgblue, in ansi.

The color italic, in ansi.

The color bgyellow, in ansi.

Remove wrapping quotes from a string.

The color underline, in ansi.

The color bggreen, in ansi.

The color hidden, in ansi.

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

Formattable string with the same API as an intrinsic string

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

The color magenta, in ansi.

The color reset, in ansi.

The color black, in ansi.

The color white, in ansi.

The color strikethrough, in ansi.

The color bgblack, in ansi.

Cross-platform info symbol.

Functional errors with formatted output

Various helper utilities

Useful utilities for working with Uint8Array (and Buffer)

Convert a value to a ReadableStream

Multi-colour console output from chalk with added awesome

ES2017 spec-compliant String.prototype.padEnd shim.

Repeat a string - fast

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

Returns `true` if the value is a primitive.

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

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

Customizable String Formatter

Simple wildcard matching

Strip a substring from the start/end of a string

Remove the trailing spaces from a string.

generic javascript number/string formatting (bytes, milliseconds, ...)

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

Check if a string is a URL

Stringify Object as tree structure

Escape strings for use as JavaScript string literals

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

Remove leading indentation from ES6 template literals.

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.

Serializes any DOM node into a String

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

Pluralize a word

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

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

Terminal string styling done right

A simple string template function based on named or indexed arguments

A string formatter and validator based on masks

Returns true if a windows file path has invalid characters.

A TypeScript port of the Java StringTemplate 4 library

A javascript library for formatting and manipulating text (strings).

fast string hashing function

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.

String manipulation extensions for Underscore.js javascript library.

Check if a character is a whitespace character

Native JS murmur hash implementation

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

Check if a string is SVG

Check if a character is a word character

Find multiple RegExp matches in a string

Elegant spinner for interactive CLI apps

Regular expression for matching HTML comments

Reduce function calls in a string, using a callback

DOMParser.parseFromString for XML with IE8 fallback

Jest snapshot serializer that beautifies HTML.

Pure-JS printf

Convert Unicode characters to Latin characters using transliteration

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

Slugify a string

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

Remove any existing casing from a string.

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

sprintf parser and basic formatter

Various helper utilities for working with buffers and binary data

ES2019 spec-compliant String.prototype.trimLeft shim.

Check if a string is an IP address

ES2017 spec-compliant String.prototype.padStart shim.

Returns true if the value passed is all whitespace.

Extensible string utility for converting, identifying and flipping string case

remove diacritics from strings

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.

ES2019 spec-compliant String.prototype.trimLeft shim.

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

Math and string formula parser.

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().

Check if a string only contains alphanumeric characters

Write data to a random temporary file

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A lightweight package for formatting strings with parameter interpolation

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

Convert a string to camel case.

strings comparison matchers for chai

Zero-dependency unicode-aware string tools

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)

Replace search occurrences with a replacement string.

Check if a string is HTML

Appends a bullet before string (to mimick lists in ASCII)

A tiny and fast package for adding colors to your terminal output.

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

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

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

Test if a value is a string.

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

Insert supplied variable values into a format string.

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

Escape a regular expression string or pattern.

Test if a value is a regular expression string.

Iterator over lines in a string