LitElement 2.x is a lightweight base class for building fast, reusable Web Components using lit-html templating. It provides a reactive property system with attribute reflection, lifecycle hooks, and a declarative style API via tagged template literals. The library is published by Google and was the foundation for the Lit library (now in a monorepo). This repository contains the source code for version 2.x, which is in maintenance mode; active development has moved to the Lit monorepo. The codebase demonstrates solid engineering with TypeScript, comprehensive tests, and benchmarks, but relies on older dependencies (lit-html v1, TSLint, Web Component Tester) and includes legacy polyfill workarounds. It is not a data research project; it is a UI component library.
This is a Nuxt module that integrates Swiper.js into Nuxt 3 applications using Web Components. It provides automatic registration of `<swiper-container>` and `<swiper-slide>` custom elements, a Vue composable (`useSwiper`) for reactive Swiper instance control, and support for both bundled and individual Swiper module imports. The module is minimal, well-typed, and leverages Nuxt's module system for configuration. It includes a playground and test fixture but no complex business logic. The codebase is clean and modern, with proper TypeScript types and a structured setup, though the test suite is practically empty. The composable is well-crafted and could be extracted as a standalone utility.
This repository defines a schema for describing custom elements manifest files. It provides a TypeScript definition file (schema.d.ts) that serves as the single source of truth for the schema, and a generated JSON Schema file (schema.json) for validation. The schema captures metadata about custom elements including their attributes, events, methods, and CSS properties. The repository includes build scripts to generate the JSON Schema from TypeScript definitions, tests to validate the schema against an example manifest, and CI/CD workflows. While the schema itself is well-designed and reusable, the project shows signs of technical drift due to outdated dependencies.
This repository is a web component library focused on accessibility, providing custom HTML elements for building inclusive web applications. It implements alternative input methods including standard mouse/keyboard/touch and pose/body tracking using TensorFlow's PoseNet model. The architecture follows web component principles using LitElement and Polymer, with a clear hierarchy of base classes (AbstractInputElement, AbstractUIElement) and specialized components for various UI patterns. The library emphasizes accessibility features like ARIA support, keyboard navigation, and screen reader compatibility. The codebase demonstrates strong craftsmanship in its utility implementations, particularly in coordinate transformation handling (mouse-position.ts), vector mathematics (vec2.ts), and general-purpose helper functions (utils.ts). The webcam integration (webcam.ts) shows proper resource management and lifecycle handling. However, the library suffers from significant technical drift due to outdated dependencies (lit-element 0.5.2, tfjs 0.13.0, typescript 3.1.6), which would require substantial updates for modern use. While the core architectural patterns are sound, the dependency versions limit practical reusability without migration work.