tegwick
642163a1ed
Assistant: codex Assistant-Model: gpt-6-astra Assistant-Session: 01a0cffe-206f-7323-89d3-b20ca4cf4bf9
2.3 KiB
| title | status | maturity | families | scales | admission | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Progressive Enhancement | draft | hypothesis |
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research-candidate-only |
Progressive Enhancement
Context: essential reading/navigation or submission should work before optional scripts arrive. Problem: delayed or failed client execution can block a usable server-delivered interface. Resilience competes with interaction richness and the cost of maintaining equivalent behavior across paths.
Proposed solution: give the essential task a usable HTML/link/form contract first; add client behavior that preserves its meaning and authoritative validation. Define which controls are essential and what enhanced behavior adds. Test absent, late and partially failing scripts separately. Server-rendered text alone does not establish a functional no-script task.
For enhanced navigation, preserve route, history, loading/error feedback and focus semantics. For writes, avoid duplicate submission when falling back after an uncertain response: reconcile the original operation before resubmitting it. Keyboard operation, labels, status announcements and recovery focus need explicit verification in both paths. Native elements help but are not an accessibility proof.
Consequences: initial tasks depend on fewer client capabilities, while parity and failure recovery add design work. No-script support is not offline support. A client-only rich editor may deliberately require scripts; name that requirement instead of promising a fallback that cannot perform the task.
Evidence: navigation review N03–N05 locates htmx and SvelteKit mechanisms with specific link/form/action prerequisites. These are two documentation families, not two verified deployments of this complete contract. Full-pattern recurrence and decision benefit remain unknown. This develops an existing seed; hypothesis only, no canonical identity or admitted relations.
Proposed connections: URL-addressable State supports shared view selection; Mutation Outcome Tracking matters when an enhanced write becomes uncertain. Neither is a universal dependency. VC-03 explores a read-only core.