Stencil
Stencil is a compiler-based toolchain for building reusable, scalable web components and design systems. It combines concepts from popular frameworks like React and Angular to generate standards-compliant custom elements that work across modern browsers without a framework runtime. It uses TypeScript, JSX, and a virtual DOM to create high-performance components that can be integrated into any web project.
Developers should use Stencil when they need to create framework-agnostic web components for design systems, component libraries, or micro-frontend architectures. It's ideal for teams building reusable UI elements that must work in multiple frameworks (e.g., React, Angular, Vue) or vanilla JavaScript projects, as it outputs standard custom elements. Stencil is also valuable for performance-critical applications due to its lazy-loading and tree-shaking capabilities.