Web Components are native browser APIs: Custom Elements, Shadow DOM, and HTML Templates. They let you build reusable UI parts like <modal-dialog> or <accordion-panel> that work in React, Vue, Svelte, Angular, or plain HTML. No build tools, no framework lock-in. With 98% browser support in 2026, they’re the most portable component format around. Write it once, ship it anywhere.
The Three APIs That Make Up Web Components
Web Components is an umbrella term for three browser APIs that work together. You can use each one on its own. Custom Elements without Shadow DOM, Shadow DOM without Templates. But the combination is where they shine.
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