const regex = new RegExp('^((?:[01][0-9]{0,2}|(?:2(?:5[0-5]{0,1}|[0-4][0-9]{0,1}|[6-9]{0,1}))|[3-9][0-9]{0,1})\\.){3}(?:[01][0-9]{0,2}|(?:2(?:5[0-5]{0,1}|[0-4][0-9]{0,1}|[6-9]{0,1}))|[3-9][0-9]{0,1})$', 'gm')
const str = `000.12.12.034
01.1.1.1
121.234.12.12
23.45.12.56
000.12.234.23.23
666.666.23.23
.213.123.23.32
23.45.22.32.
I.Am.not.an.ip
1.1.1.1
0.0.0.0
255.2.2.255
256.0.0.33
199.200.0.22
000
111
0
00
1
00
11
99
90
2
3
4
292
999
255
266
299
256
199
244
000.12.12.034
121.234.12.12
23.45.12.56
00.12.123.123123.123
122.23
Hello.IP
`;
// 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