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# IPv6 Support
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Specialized support for IPv6 address handling and normalization with optimal text representation.
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## Capabilities
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### IPv6 Address Normalization
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```javascript { .api }
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/**
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 * Convert IPv6 address to best text representation
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 * @param address - IPv6 address string to normalize
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 * @returns Optimized IPv6 address representation
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 */
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IPv6.best(address: string): string;
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/**
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 * Restore previous IPv6 variable
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 * @returns Previous IPv6 variable value
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 */
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IPv6.noConflict(): any;
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```
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**Usage Examples:**
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```javascript
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// Import IPv6 module
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import IPv6 from 'urijs/src/IPv6';
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// Normalize IPv6 addresses
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const longForm = '2001:0db8:0000:0000:0000:0000:0000:0001';
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const optimized = IPv6.best(longForm);
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console.log(optimized); // '2001:db8::1'
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// Handle zero compression
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const withZeros = '2001:db8:0:0:1:0:0:1';
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const compressed = IPv6.best(withZeros);
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console.log(compressed); // '2001:db8::1:0:0:1'
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// Mixed IPv4-IPv6 addresses
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const mixed = '::ffff:192.168.1.1';
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const mixedOpt = IPv6.best(mixed);
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console.log(mixedOpt); // '::ffff:192.168.1.1' (already optimal)
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// Use with URI.js
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const uri = new URI('http://[2001:db8::1]:8080/path');
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console.log(uri.hostname()); // '2001:db8::1'
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console.log(uri.is('ip6')); // true
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```