function isIP
Usage in Deno
```typescript import { isIP } from "node:node__net.d.ts"; ```
isIP(input: string): number
Returns `6` if `input` is an IPv6 address. Returns `4` if `input` is an IPv4
address in [dot-decimal notation](https://en.wikipedia.org/wiki/Dot-decimal_notation) with no leading zeroes. Otherwise, returns`0`.
```js
net.isIP('::1'); // returns 6
net.isIP('127.0.0.1'); // returns 4
net.isIP('127.000.000.001'); // returns 0
net.isIP('127.0.0.1/24'); // returns 0
net.isIP('fhqwhgads'); // returns 0
```
number