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is-cidr

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is-cidr

Check if a string is an IP address in CIDR notation

  • 5.1.0
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  • npm
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What is is-cidr?

The is-cidr npm package is a utility for validating and parsing CIDR (Classless Inter-Domain Routing) notations. It helps in determining whether a given string is a valid CIDR notation for IPv4 or IPv6 addresses.

What are is-cidr's main functionalities?

Validate IPv4 CIDR

This feature allows you to check if a given string is a valid IPv4 CIDR notation. The function returns true if the input is a valid IPv4 CIDR and false otherwise.

const isCidr = require('is-cidr');
console.log(isCidr.v4('192.168.0.1/24')); // true
console.log(isCidr.v4('192.168.0.1')); // false

Validate IPv6 CIDR

This feature allows you to check if a given string is a valid IPv6 CIDR notation. The function returns true if the input is a valid IPv6 CIDR and false otherwise.

const isCidr = require('is-cidr');
console.log(isCidr.v6('2001:db8::/32')); // true
console.log(isCidr.v6('2001:db8::')); // false

Validate both IPv4 and IPv6 CIDR

This feature allows you to check if a given string is a valid CIDR notation for either IPv4 or IPv6. The function returns 4 for valid IPv4 CIDR, 6 for valid IPv6 CIDR, and 0 for invalid CIDR.

const isCidr = require('is-cidr');
console.log(isCidr('192.168.0.1/24')); // 4
console.log(isCidr('2001:db8::/32')); // 6
console.log(isCidr('invalid-cidr')); // 0

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Package last updated on 23 May 2024

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