How to Build CSS-Only UI Components
Create interactive UI elements like toggles, accordions, tabs, and tooltips using only CSS — no JavaScript required.
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CSS-Only UI Components
Many interactive UI patterns traditionally built with JavaScript can be implemented with CSS alone, reducing bundle size and improving performance. These solutions use native HTML elements enhanced with modern CSS.
Accordions with details/summary
The HTML and elements create native accordions without any CSS or JavaScript. The browser handles the open/close interaction, keyboard navigation, and accessibility. Style with CSS: the [open] attribute selector targets the expanded state. For custom chevron animation, hide the default marker with list-style: none and add a rotating pseudo-element.
Tabs with Radio Buttons
Use hidden radio inputs with associated labels as tab headers. The :checked pseudo-class on each radio input controls which tab panel is visible. The labels function as clickable tab buttons. This approach is accessible with keyboard navigation (arrow keys switch between radios in a group) and requires zero JavaScript.
Tooltips with CSS
Use the ::after pseudo-element on a parent element, with content pulled from a data-tooltip attribute. The tooltip is hidden by default (opacity: 0; pointer-events: none) and shown on :hover and :focus-within. Position with CSS transforms. Add transition: opacity 0.2s for smooth appearance. For touch devices, use :focus-within rather than :hover.
Toggle Switches
Style a checkbox as a toggle: hide the default checkbox, style the label as a track with a sliding circle, and use :checked + label to move the circle and change the track color. Include focus styles for keyboard accessibility. Ensure the toggle has an accessible name via the label text or aria-label.
Limitations
CSS-only solutions have limitations: state doesn't persist across page loads, complex conditional logic is impractical, and accessibility may require additional ARIA attributes. For simple interactive patterns, CSS-only is excellent. For complex interactive applications, JavaScript provides better control and accessibility.
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