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๐Ÿ—‚๏ธ Telephone Number Validator ๐Ÿ“žโ˜Ž๏ธ

โžก๏ธ Key Concepts :

โœ… regex

โœ… regex.test( )

โœ… addEventListener( )

โœ… getElementById( )

โ„น๏ธ In the US, phone numbers can be formatted in many ways. Here are some examples of valid formats for US phone numbers:

โ˜Ž๏ธ 1 555-555-5555

โ˜Ž๏ธ 1 (555) 555-5555

โ˜Ž๏ธ 1(555)555-5555

โ˜Ž๏ธ 1 555 555 5555

โ˜Ž๏ธ 5555555555

โ˜Ž๏ธ 555-555-5555

โ˜Ž๏ธ (555)555-5555

Note that the area code is required. Also, if the country code is provided, you must confirm that the country code is 1.