F Kitchen Sink

Accessibility audit rules

Error Prevention

Accessibility rule handbook metadata

Rule
DET.A11Y.GENERIC.ERROR_PREVENTION · lane deterministic · scope generic
Page status
current
page_version
c11e75ee0785a026394759e18801722697d239b0268b0bb721ccc7bdc9765ea4
generated_at
2026-05-28T05:09:12.000Z
registry_fingerprint
b3797010c3ca988bb0d21d5e85d4efece0b9e83f311c2d4981ebbf402df7a7c2

Related WCAG success criteria

Indicative mapping for compliance reporting — not a conformance claim. Criteria: 3.3.4, 3.3.6

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.ERROR_PREVENTION

Module: docs/design/a11y-audit/deterministic-a11y-rules.md#det-a11y-generic-error-prevention. 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.ERROR_PREVENTION on the crawled URL.
  • Harness: auditor-tests/invoke-a11y-ruleset-harness.sh DET.A11Y.GENERIC.ERROR_PREVENTION expects ≥1 finding on the Before fixture.

Before example

Before (failing example)

Checkout

Enter payment card details to complete your purchase.

After example

After (passing example)

Checkout

Enter payment card details to complete your purchase.

Evidence and remediation

  1. Reproduce with analyze-website-a11y.mjs --only-deterministic-rule-ids DET.A11Y.GENERIC.ERROR_PREVENTION 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.