const regex = /^(?:[4-9]|\d\d+)(?:\.\d+){3}|3\.[2-9]\d(?:\.\d+){2}|3\.1[1-9](?:\.\d+){2}|3\.10\.[1-9]\d?\.\d+$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?:[4-9]|\\d\\d+)(?:\\.\\d+){3}|3\\.[2-9]\\d(?:\\.\\d+){2}|3\\.1[1-9](?:\\.\\d+){2}|3\\.10\\.[1-9]\\d?\\.\\d+$', 'gm')
const str = `3.10.1.0
3.10.2.0
3.10.13.1
3.11.0.0
3.11.2.0
3.20.0.0
4.0.0.0
5.0.0.0
10.0.0.0
3.10.0.0
3.9.0.0
3.1.0.0
3.0.0.0
2.0.0.0
1.0.0.0`;
// 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