Accordion

Overview

Progressively disclose secondary detail. It establishes reading order and decision grouping before visual decoration.

When to use

Use HE/Accordion when you need to progressively disclose secondary detail. Keep its role distinct from transport freshness, animal-health severity and model confidence.

Example

<details class="he-accordion" open><summary>Adaptive sampling</summary><div class="he-accordion__content">Sampling slows when the signal remains stable and increases when change is detected.</div></details>

Anatomy

Anatomy stays identical in Pasture and Atlantic. A responsive layout may wrap or stack parts, but reading order and focus order remain equivalent.

Variants and states

Accessibility

The trigger is a button with expanded and controls relationships.

• Maintain a visible keyboard focus indicator and a logical focus sequence.
• Never rely on colour alone for operational, freshness or severity state.
• Keep touch targets at least 44 × 44 px unless the target is an inline text link.

Cross-platform contract

Related components