Text Toolbox [WIP]

A high-performance TypeScript library for string similarity and distance algorithms—complete with robust utilities for string cleaning, normalization, and format transformation.

• Fully tree-shakeable
• Zero dependencies

Installation

# pnpm
pnpm add text-toolbox

# npm
npm install text-toolbox

# yarn
yarn add text-toolbox

Algorithms

Distance

• levenshtein() - Calculates the Levenshtein distance between two strings.
• damerauLevenshtein() - Calculates the Damerau-Levenshtein distance between two strings.
• diceCoefficient() - Calculates the Dice coefficient between two strings.
• cosineDistance() - Calculates the cosine distance between two strings.

Similarity

• cosineSimilarity() - Calculates the cosine similarity between two strings.
• jaroWinkler() - Calculates the Jaro-Winkler similarity between two strings.

Metaphonics

• metaphoneThree() - Implements the Metaphone 3 algorithm for phonetic encoding.
• doubleMetaphone() - Implements the Double Metaphone algorithm for phonetic encoding.

String Cleaning Utilities

A set of helper functions to normalize and sanitize strings before comparison.

Whitespace Normalizers

Clean up inconsistent or unwanted whitespace:

• ensureSpaceAfterPunctuation() - Ensures there is exactly one space after punctuation marks like . , : ; ! ? (if followed by a word character).
• normalizePunctuationSpacing() - Normalizes spaces around punctuation by removing spaces before, ensuring one space after, optionally removing extra spaces, and allowing custom tight spacing for specific characters (e.g., -, ').
• normalizeWhitespace() - Trims leading/trailing whitespace and collapses all internal whitespace (spaces, tabs, newlines) to a single space.
• removeAllWhitespace() - Removes all whitespace characters (spaces, tabs, newlines) from the string.
• removeExtraSpaces() - Replaces multiple consecutive spaces with a single space (ignores tabs/newlines).
• removeLeadingWhitespace() - Removes whitespace at the beginning of the string.
• removeTrailingWhitespace() - Removes whitespace at the end of the string.
• removeWhitespaceBeforePunctuation() - Removes any whitespace directly before punctuation like . , : ; ! ?.

Special Character Cleaners

Remove or replace problematic characters and formatting:

• removeCombiningMarks() - Removes all types of combining marks from a string.
• removeModifiers() - Removes modifier letters and symbols from a string.
• removeDiacritics() - Removes diacritic marks (accents) from characters in a string.
• removeHtmlTags() - Strips HTML tags from the input string.
• removeIllegalCharacters() - Removes illegal or non-printable characters from the string.
• removeNewLineCharacters() - Removes newline (\n) and carriage return (\r) characters from the string.
• removeNonASCII() - Removes all non-ASCII characters from the string.
• removeControlCharacters() - Strips control characters from the string.
• removePunctuation() - Removes punctuation characters from the string.
• replaceCompatibilityCharacters() - Normalizes text by converting non-ASCII characters (like æ, ø, ß) to their closest ASCII representation (ae, oe, ss).
• replaceSmartTypography() - Converts smart typography characters (like curly quotes and em-dashes) to their standard ASCII equivalents.
• stripEmoji() - Removes all emoji characters from the string.

Text Transformers

• removeDuplicateWords() - Removes duplicate words that appear consecutively in a string.
• removeTitlePrefix() - Removes common prefixes from titles (e.g., "The", "A", "An").
• removeTitleSuffix() - Removes common suffixes from titles.

String Case Formatters

• camelCase() - Converts a string to camel case, where the first word is lowercase and each subsequent word starts with an uppercase letter, with no spaces or punctuation.
• constantCase() - Converts a string to constant case, where each word is capitalized and separated by underscores.
• dotCase() - Converts a string to dot case, where each word is lowercase and separated by periods.
• kebabCase() - Converts a string to kebab case, where each word is lowercase and separated by hyphens.
• pascalCase() - Converts a string to Pascal case, where each word starts with an uppercase letter and there are no spaces or punctuation.
• pathCase() - Converts a string to path case, where each word is lowercase and separated by slashes.
• sentanceCase() - Converts a string to sentence case, where only the first letter of the first word is capitalized.
• snakeCase() - Converts a string to snake case, where each word is lowercase and separated by underscores.
• titleCase() - Converts a string to title case, where the first letter of each word is capitalized.

String Tokenizers

• fingerprint() - Normalizes text by removing special characters, creating sorted unique word lists.

Presets

• normalizeName() - Normalizes names by applying a series of transformations to standardize formatting.

Security

This package is safe :)

License

MIT