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nielslange/isValidIPv4.js

Last active January 6, 2021 12:32
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JavaScript: Validate IPv4 address
Raw
isValidIPv4.js
// Validate IPv4 address
function isValidIPv4(string) {
const octet = '(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]?|0)';
const regex = new RegExp(`^${octet}\\.${octet}\\.${octet}\\.${octet}$`);
return regex.test(string) ? true : false;
}
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