const regex = /(?<!\S)(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])(?!\S)/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<!\\S)(?:(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])\\.){3}(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[0-9]?[0-9])(?!\\S)', 'gm')
const str = `1.1.1.1 kaseroi 1.1.1.1 jsoiu 1.1.1.1
1
1
11
123
132132.23213.213213.123213
23.23.23.23 2321321.33.3.3.3 3.3..3.3.3.3.3.
3.3.3.3.3.3
3.3.3.3
34.5.6.7
agdi 123213.44.4.5 12.12.12.12`;
// 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