const regex = /^(?!(192\.168\.))^(?!(172\.(1[6-9]|2[0-9]|3[0-1])\.))^((([1-9]|1[1-9]|[2-9][0-9]|1[0-9]{2}|2[0-1][0-9]|22[0-3])\.)((0|1[0-9]{0,2}|[2-9][0-9]|2[0-4][0-9]|25[0-5])\.){2}(1[0-9]{0,2}|[2-9][0-9]|2[0-4][0-9]|25[0-4]))$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?!(192\\.168\\.))^(?!(172\\.(1[6-9]|2[0-9]|3[0-1])\\.))^((([1-9]|1[1-9]|[2-9][0-9]|1[0-9]{2}|2[0-1][0-9]|22[0-3])\\.)((0|1[0-9]{0,2}|[2-9][0-9]|2[0-4][0-9]|25[0-5])\\.){2}(1[0-9]{0,2}|[2-9][0-9]|2[0-4][0-9]|25[0-4]))$', 'gm')
const str = `0.0.0.0
1.0.0.0
1.0.0.1
01.0.0.1
1.00.0.1
1.0.00.1
1.0.0.01
1.0.0.254
1.0.0.255
10.0.0.1
11.0.0.1
11.20.0.1
11.99.0.1
11.100.0.1
172.15.255.254
172.16.0.1
172.19.254.254
172.31.255.254
172.32.0.1
192.168.0.1
192.169.0.1
223.0.0.1
223.255.255.254
223.255.255.255
224.0.0.1
255.0.0.0
255.0.0.1
255.255.0.1
`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions