{
  "id": "F50",
  "rulePrefix": "F50",
  "variant": null,
  "ruleType": "w3c-failure",
  "scanScope": "specimen",
  "synthetic": false,
  "status": "current",
  "title": "Failure of Success Criterion 2.2.2 due to a script that causes a blink effect without a\n                    mechanism to stop the blinking at 5 seconds or less",
  "summary": "a script that causes a blink effect without a\n                    mechanism to stop the blinking at 5 seconds or less",
  "whyItFails": "This page reproduces the F50 failure pattern so auditors can verify detection against 2.2.2.",
  "principles": [
    "operable"
  ],
  "guidelines": [
    "2.2"
  ],
  "successCriteria": [
    {
      "id": "2.2.2",
      "name": "Pause, Stop, Hide",
      "level": "A",
      "slug": "pause-stop-hide"
    }
  ],
  "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/pause-stop-hide"
    ],
    "quickref": [
      "https://www.w3.org/WAI/WCAG22/quickref/#pause-stop-hide"
    ],
    "technique": "https://www.w3.org/WAI/WCAG22/Techniques/failures/F50"
  },
  "specimen": {
    "html": "<p id=\"f50-text\">Processing your request…</p>",
    "css": "",
    "js": "setInterval(() => {\n  const el = document.getElementById('f50-text');\n  if (el) el.style.visibility = el.style.visibility === 'hidden' ? 'visible' : 'hidden';\n}, 500);",
    "assets": [],
    "demoHint": "The status text blinks continuously with no control to stop it within five seconds."
  },
  "expectedFindings": [
    {
      "sc": "2.2.2",
      "outcome": "fail",
      "note": "Specimen demonstrates failure of 2.2.2."
    }
  ],
  "mustNotFlag": [],
  "manualCheck": "Confirm the specimen demonstrates the documented F50 failure in isolation.",
  "generated": {
    "url": "https://wcagfail.patternd.io/specimens/F50/",
    "lastmod": "2026-10-08"
  }
}