{
  "id": "F12",
  "rulePrefix": "F12",
  "variant": null,
  "ruleType": "w3c-failure",
  "scanScope": "specimen",
  "synthetic": false,
  "status": "current",
  "title": "Failure of Success Criterion 2.2.5 due to having a session time limit without a mechanism\n                    for saving user's input and re-establishing that information upon\n                    re-authentication",
  "summary": "having a session time limit without a mechanism\n                    for saving user's input and re-establishing that information upon\n                    re-authentication",
  "whyItFails": "This page reproduces the F12 failure pattern so auditors can verify detection against 2.2.5.",
  "principles": [
    "operable"
  ],
  "guidelines": [
    "2.2"
  ],
  "successCriteria": [
    {
      "id": "2.2.5",
      "name": "Re-authenticating",
      "level": "AAA",
      "slug": "re-authenticating"
    }
  ],
  "versions": [
    "2.0",
    "2.1",
    "2.2"
  ],
  "automatable": "no",
  "requires": [
    "html",
    "js",
    "timed"
  ],
  "isolated": true,
  "pairWith": [],
  "w3c": {
    "understanding": [
      "https://www.w3.org/WAI/WCAG22/Understanding/re-authenticating"
    ],
    "quickref": [
      "https://www.w3.org/WAI/WCAG22/quickref/#re-authenticating"
    ],
    "technique": "https://www.w3.org/WAI/WCAG22/Techniques/failures/F12"
  },
  "specimen": {
    "html": "<p>Your session will expire without warning.</p>\n<p id=\"f12-countdown\">Time remaining: calculating…</p>",
    "css": "",
    "js": "setTimeout(() => { window.location.href = 'about:blank'; }, 120000);\nconst el = document.getElementById('f12-countdown');\nlet s = 120;\nsetInterval(() => { if (el) el.textContent = 'Time remaining: ' + (--s) + 's'; }, 1000);",
    "assets": []
  },
  "expectedFindings": [
    {
      "sc": "2.2.5",
      "outcome": "fail",
      "note": "Specimen demonstrates failure of 2.2.5."
    }
  ],
  "mustNotFlag": [],
  "manualCheck": "Confirm the specimen demonstrates the documented F12 failure in isolation.",
  "generated": {
    "url": "https://wcagfail.patternd.io/specimens/F12/",
    "lastmod": "2026-10-08"
  }
}