Stencil
Stencil is a compiler that generates Web Components (custom HTML elements) by combining the best concepts of popular frameworks into a simple build-time tool. It allows developers to create reusable UI components that work across any framework (React, Angular, Vue) or with no framework at all, using TypeScript and JSX syntax. The output is standards-based Web Components that are highly performant and framework-agnostic.
Developers should learn Stencil when building design systems, component libraries, or applications that need to work across multiple frameworks or be future-proofed against framework changes. It's particularly valuable for enterprise applications, large-scale projects, or teams supporting diverse tech stacks, as it enables creating reusable components without framework lock-in while maintaining excellent performance and developer experience.