Developers Are Building CSS-Only Web Components Without Any JavaScript

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A growing trend among web developers involves using custom HTML element names styled purely with CSS, bypassing JavaScript entirely — no class definitions, no lifecycle callbacks, and no component bundles. Because browsers treat undefined custom elements as valid HTML, they can be selected and styled like any standard element. This approach offers zero JavaScript overhead, progressive enhancement by default, and a clean API surface through CSS custom properties and attribute selectors. Meaningful tag names also improve readability in dev tools and design handoffs, making a component library's vocabulary visible directly in the DOM. If interactivity is later needed, the same tag name can be registered via customElements.define() without altering existing markup.

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