JavaScript: IPv6 validator

validator.js

Implement and export as default the predicate function isValidIPv6() that checks if IPv6 addresses (the sixth version of the Internet Protocol) are valid. The function takes a string with an IPv6 address as input and returns true if the address is valid, otherwise false.

Additional conditions:

• The function does not depend on the case of characters
• Leading zeros in digit groups are optional
• The longest sequence of groups of zeros, for example, :0:0:0: can be replaced with two colons ::. Such a substitution can be made only once
• One group of zeros :0: cannot be replaced by ::

Examples

isValidIPv6('10:d3:2d06:24:400c:5ee0:be:3d'); // true
isValidIPv6('0B0:0F09:7f05:e2F3:0D:0:e0:7000'); // true
isValidIPv6('000::B36:3C:00F0:7:937'); // true
isValidIPv6('::1'); // true

isValidIPv6('2607:G8B0:4010:801::1004'); // false
isValidIPv6('1001:208:67:4f00:e3::2c6:0'); // false
isValidIPv6('2.001::'); // false
isValidIPv6('9f8:0:69S0:9:9:d9a:672:f90d'); // false

Tips

• IPv6
• To check for borderline cases, carefully examine the list of IP addresses in the file with tests