Essential content remains available when scripts or styles fail.

Expectations and evidence

Required inputs (protocol identifiers)

html, render, intent

When it applies

Flows whose essential content and navigation are defined.

How to check

Test source HTML, disabled JavaScript and degraded network conditions.

Expectation

Blocked-script and degraded-style scenarios preserve declared functions or an actually tested fallback.

Evidence to retain

Primary information and navigation remain available, or a fallback is documented.

Non-applicability

No relevant web flow, with a justification.

Limitations

Acceptable degradation depends on the component’s function.

Outcome clarification

C requires all expectations across the declared scope. NC requires evidenced contradiction; otherwise NT. NA requires evidence of non-applicability.

Reference scope

Technical reference; the TSEP acceptance rule remains an editorial proposal.