{"record":{"id":"60f8554035930227","repo":"nosir/cleave.js","slug":"invalid-region-code-60f855","errorCode":null,"errorMessage":"Invalid region code: ","messagePattern":"Invalid region code: ","errorType":"exception","errorClass":"Error","httpStatus":null,"severity":"error","filePath":"src/addons/phone-type-formatter.lc.js","lineNumber":112,"sourceCode":" Copyright (C) 2010 The Libphonenumber Authors.\n\n Licensed under the Apache License, Version 2.0 (the \"License\");\n you may not use this file except in compliance with the License.\n You may obtain a copy of the License at\n\n http://www.apache.org/licenses/LICENSE-2.0\n\n Unless required by applicable law or agreed to in writing, software\n distributed under the License is distributed on an \"AS IS\" BASIS,\n WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.\n See the License for the specific language governing permissions and\n limitations under the License.\n*/\nfunction M(){this.a={}}M.b=function(){return 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This is thrown from the formatter's constructor (R is called in the Q constructor) before any formatting can occur.","triggerScenarios":"Instantiating the lc formatter with '' or undefined as the region; or re-initializing with a region value that is not a 2-letter code present in the bundle's metadata.","commonSituations":"Empty default option in a country <select> submitted as the region; geo-IP service failing in dev/offline environments and returning ''; automated tests constructing the formatter without fixture data; SSR where the client-only region lookup returns nothing.","solutions":["Pass 'LC' explicitly (trimmed, uppercase) when using this addon.","Validate region presence with a small guard before calling the formatter.","Give the region source (dropdown/detector/API) a valid default so it never yields ''.","Catch the error and degrade gracefully (return the raw phone string) instead of crashing the UI."],"exampleFix":"// before\nconst fmt = new phoneFormatter(detectedRegion); // '' when detection fails\n// after\nconst fmt = detectedRegion\n  ? new phoneFormatter(String(detectedRegion).trim().toUpperCase())\n  : new phoneFormatter('LC');","handlingStrategy":"fallback","validationCode":"const region = (detectedRegion || '').trim().toUpperCase() || 'LC';\nif (!/^[A-Z]{2}$/.test(region)) return input; // bail out before touching the formatter","typeGuard":"function isTwoLetterCode(v) {\n  return typeof v === 'string' && v.trim().length === 2 && /^[A-Za-z]{2}$/.test(v);\n}","tryCatchPattern":"function formatSafe(phone, region) {\n  try {\n    return new phoneFormatter(region).format(phone);\n  } catch (e) {\n    if (/Invalid region code/.test(e.message)) return new phoneFormatter('LC').format(phone);\n    throw e;\n  }\n}","preventionTips":["Fail geo-IP detection loudly in dev so '' never reaches the formatter in production.","In SSR/bootstrapping, don't construct region-dependent formatters until client data is ready.","Prefer explicit region constants over dynamic values where the country is fixed per addon file.","Include the region value in error monitoring payloads to catch empty-region regressions fast."],"tags":["libphonenumber","phone-formatting","region-code","invalid-argument"],"backgroundTag":"invalid-region-code","analyzedSha":"a966c95cf5193f223485a10eec8405bb32b8f6dd","analyzedAt":"2026-09-02T23:44:35.488Z","contentChangedAt":null,"schemaVersion":2},"datasetVersion":"2026-09-10T02:17:09.455Z"}