validCctld top-level constant

String const validCctld

validCctld is a constant RegExp pattern string constructed to match a wide range of valid country code top-level domains (ccTLDs). The string encompasses an extensive list of ccTLDs representing various countries and territories, utilizing different scripts and alphabets.

The pattern is designed to match against:

• Latin script ccTLDs: such as .uk, .eu, .us.
• Non-Latin script ccTLDs: including Internationalized Domain Names (IDNs) like .中国, .ไทย.
• Special characters: ccTLDs containing special characters like hyphens, e.g., .co.uk.

Implementation

const validCctld = '(?:(?:'
    '한국|香港|澳門|新加坡|台灣|台湾|中國|中国|გე|ລາວ|ไทย|ලංකා|ഭാരതം|ಭಾರತ|భారత్|சிங்கப்பூர்|இலங்கை|இந்தியா|ଭାରତ|'
    'ભારત|ਭਾਰਤ|ভাৰত|ভারত|বাংলা|भारोत|भारतम्|भारत|ڀارت|پاکستان|موريتانيا|مليسيا|مصر|قطر|فلسطين|عمان|'
    'عراق|سورية|سودان|تونس|بھارت|بارت|ایران|امارات|المغرب|السعودية|الجزائر|البحرين|الاردن|հայ|қаз|'
    'укр|срб|рф|мон|мкд|ею|бел|бг|ευ|ελ|zw|zm|za|yt|ye|ws|wf|vu|vn|vi|vg|ve|vc|va|uz|uy|us|um|uk|'
    'ug|ua|tz|tw|tv|tt|tr|tp|to|tn|tm|tl|tk|tj|th|tg|tf|td|tc|sz|sy|sx|sv|su|st|ss|sr|so|sn|sm|sl|'
    'sk|sj|si|sh|sg|se|sd|sc|sb|sa|rw|ru|rs|ro|re|qa|py|pw|pt|ps|pr|pn|pm|pl|pk|ph|pg|pf|pe|pa|om|'
    'nz|nu|nr|np|no|nl|ni|ng|nf|ne|nc|na|mz|my|mx|mw|mv|mu|mt|ms|mr|mq|mp|mo|mn|mm|ml|mk|mh|mg|mf|'
    'me|md|mc|ma|ly|lv|lu|lt|ls|lr|lk|li|lc|lb|la|kz|ky|kw|kr|kp|kn|km|ki|kh|kg|ke|jp|jo|jm|je|it|'
    'is|ir|iq|io|in|im|il|ie|id|hu|ht|hr|hn|hm|hk|gy|gw|gu|gt|gs|gr|gq|gp|gn|gm|gl|gi|gh|gg|gf|ge|'
    'gd|gb|ga|fr|fo|fm|fk|fj|fi|eu|et|es|er|eh|eg|ee|ec|dz|do|dm|dk|dj|de|cz|cy|cx|cw|cv|cu|cr|co|'
    'cn|cm|cl|ck|ci|ch|cg|cf|cd|cc|ca|bz|by|bw|bv|bt|bs|br|bq|bo|bn|bm|bl|bj|bi|bh|bg|bf|be|bd|bb|'
    'ba|az|ax|aw|au|at|as|ar|aq|ao|an|am|al|ai|ag|af|ae|ad|ac'
    r')(?=[^0-9a-zA-Z@+-]|$))';