const regex = /^(?:(?:(0?[1-9]|1\d|2[0-8])[\/](0?[1-9]|1[0-2])|(29|30)[\/](0?[13-9]|1[0-2])|(31)[\/](0?[13578]|1[02]))[\/](0{2,3}[1-9]|0{1,2}[1-9]\d|0?[1-9]\d{2}|[1-9]\d{3})|(29)[\/](0?2)[\/](\d{1,2}(?:0[48]|[2468][048]|[13579][26])|(?:0?[48]|[13579][26]|[2468][048])00))$/mg;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(?:(?:(0?[1-9]|1\\d|2[0-8])[\\\/](0?[1-9]|1[0-2])|(29|30)[\\\/](0?[13-9]|1[0-2])|(31)[\\\/](0?[13578]|1[02]))[\\\/](0{2,3}[1-9]|0{1,2}[1-9]\\d|0?[1-9]\\d{2}|[1-9]\\d{3})|(29)[\\\/](0?2)[\\\/](\\d{1,2}(?:0[48]|[2468][048]|[13579][26])|(?:0?[48]|[13579][26]|[2468][048])00))$', 'mg')
const str = `19/6/2003
23/4/2003
25/12/2022
15/7/2026
30/2/2004
32/11/2005
0/5/2001`;
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