nosir/cleave.js · error · Error

Invalid region code:

Error message

Invalid region code: 

What it means

The Kuwait (KW) addon's embedded libphonenumber resolver throws "Invalid region code: <code>" when the formatter's region code cannot be matched in the bundled metadata map (phone-type-formatter.kw.js:64).

Source

Thrown at src/addons/phone-type-formatter.kw.js:64

 Copyright (C) 2010 The Libphonenumber Authors.

 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
 You may obtain a copy of the License at

 http://www.apache.org/licenses/LICENSE-2.0

 Unless required by applicable law or agreed to in writing, software
 distributed under the License is distributed on an "AS IS" BASIS,
 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.
*/
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View on GitHub (pinned to a966c95cf5)

Solutions

1. Pair phone-type-formatter.kw.js with phoneRegionCode 'KW'.
2. Validate the region code (2-letter A-Z) before passing it to Cleave.
3. Import all country addons your app supports.
4. Catch and fall back: on init failure, use the field without phone formatting.

Example fix

// before
new Cleave(el, { phone: true, phoneRegionCode: code });
// after
if (!/^[A-Za-z]{2}$/.test(code || '')) code = 'KW';
require('cleave.js/dist/addons/phone-type-formatter.kw.js');
new Cleave(el, { phone: true, phoneRegionCode: code.toUpperCase() });

function assertRegion(code) {
  if (typeof code !== 'string' || !/^[A-Za-z]{2}$/.test(code.trim())) {
    throw new Error('Invalid phoneRegionCode: ' + code);
  }
  return code.trim().toUpperCase();
}

function isKwRegion(code) {
  return typeof code === 'string' && code.trim().toUpperCase() === 'KW';
}

try {
  new Cleave(el, { phone: true, phoneRegionCode: assertRegion(code) });
} catch (e) {
  if (e.message.includes('Invalid region code')) {
    console.warn('Unsupported region, disabling phone formatting');
  } else { throw e; }
}

When it happens

Trigger: AsYouTypeFormatter (via Cleave phone option) initialized with a region code unsupported by the KW metadata bundle — typically any code other than 'KW', or an invalid/empty string.

Common situations: Region code supplied from user input or route params without validation; addon for one country paired with another region in config; stale addon files after upgrading cleave.js.

Related errors

• Invalid region code:
• Invalid region code:
• Invalid region code:
• Invalid region code:
• [cleave.js] Please include phone-type-formatter.{country}.js

AI-assisted analysis of nosir/cleave.js@a966c95cf5 (2026-09-02). Data as JSON: /api/errors/1cb4a8b9cbee205b. Report an issue: GitHub.