isIPV4

The isIPV4 function checks if a string matches the format of a valid IPv4 address, with or without a port.

Syntax

isIPV4(value)

Parameters

Parameter	Type	Description
value	string	Address to be checked.

Return

Type	Description
boolean	Returns true if the string matches the format of a valid IPv4, otherwise returns false.

Examples

isIPV4('192.168.0.1');        // true
isIPV4('255.255.255.255');    // true
isIPV4('10.0.0.1:8080');      // true
isIPV4('256.0.0.1');          // false
isIPV4('192.168.0');          // false
isIPV4('abc.def.ghi.jkl');    // false
isIPV4('192.168.0.1:99999');  // false

Notes

• Throws a TypeError if the provided value is not a string.
• Supports addresses with or without port (e.g., 192.168.0.1:8080).

References

• MDN: String.prototype.test()
• Wikipedia: Endereço IPv4