Inject scripts and styles into the DOM with duplicate prevention and completion callback support

A lightweight, developer-friendly Node.js package to streamline visitor check-ins with powerful validation, duplicate prevention, and MongoDB/Mongoose support. Ideal for integration with **Meteor.js**, **Express**, or any **Node.js** backend.

Compile objects with duplicate keys to valid strict ES5

Compile regular expressions using duplicate named groups to index-based groups.

A lightweight cache for file metadata, ideal for processes that work on a specific set of files and only need to reprocess files that have changed since the last run

Parser for Github, GitLab and Bitbucket issues actions, references and mentions

TypeScript reactive library for Google Tag Manager with configurable priority system, RxJS, and automatic duplicate prevention in Frontend and SSR environments.

Compile objects with duplicate keys to valid strict ES5

remark-lint rule to warn on duplicate definitions

Webpack plugin that warns you when multiple versions of the same package exist in a build.

remark-lint rule to warn on duplicate headings

Webpack plugin that warns you when multiple versions of the same package exist in a build.

rehype plugin to remove duplicates in attribute values with unique tokens

A Gherkin linter/validator written in javascript

[](https://www.npmjs.com/package/ts-proto) [](https://github.com/stephenh/ts-proto/actions)

remark-lint rule to warn on duplicate headings in a section

A React component for Rutter Link

Discard duplicate rules in your CSS files with PostCSS.

ESLint plugin for Angular Templates

AI-native quality gate engine with local Bayesian learning. AST analysis, drift detection, Fix Packet generation, and agent self-healing across TypeScript, JavaScript, Python, Go, Ruby, and C#.