F Kitchen Sink

Accessibility audit rules

Viewport

Accessibility rule handbook metadata

Rule
DET.A11Y.GENERIC.VIEWPORT · lane deterministic · scope generic
Page status
current
page_version
1ceebbbf934953cf933e81cb1f0a00d2ca8695aab64a86f5fff229c14bb1b270
generated_at
2026-05-26T08:51:23.000Z
registry_fingerprint
e11a2939d018a45bae7d6e23364aba2ae4e13f190d942f49891c89ea84c44c46

How this rule is checked

Deterministic lane — scope generic. Detected by det-a11y-generic-*.check.js or the axe lane for WCAG-tagged violations.

  • Harness: auditor-tests/invoke-a11y-ruleset-harness.sh on the Before fixture.
  • Audit: analyze-website-a11y.mjs --only-deterministic-rule-ids DET.A11Y.GENERIC.VIEWPORT

Module: docs/design/a11y-audit/deterministic-a11y-rules.md#det-a11y-generic-viewport. See Before / After below.

Purpose

Deterministic accessibility check (generic scope).

Passing signals

  • DOM and/or repo signals satisfy the rule implementation in tools/website-a11y-auditor.
  • For axe-backed WCAG criteria, use --lanes axe,det with an appropriate --standard preset.

Failing signals

  • Auditor emits a finding with ruleId DET.A11Y.GENERIC.VIEWPORT on the crawled URL.
  • Harness: auditor-tests/invoke-a11y-ruleset-harness.sh DET.A11Y.GENERIC.VIEWPORT expects ≥1 finding on the Before fixture.

Before example

Before (failing example)

Placeholder failing state for DET.A11Y.GENERIC.VIEWPORT (generic).

After example

After (passing example)

Placeholder passing state for DET.A11Y.GENERIC.VIEWPORT.

Evidence and remediation

  1. Reproduce with analyze-website-a11y.mjs --only-deterministic-rule-ids DET.A11Y.GENERIC.VIEWPORT when lane is deterministic.
  2. Apply the After markup pattern (or fix generator source for KS rules).
  3. Re-run harness or audit until the rule is clean on the target URL.