const regex = /^\d{4}-(((0[13578]|1[02])-(0[1-9]|[12]\d|3[0-1]))|(02-(0[1-9]|[12]\d))|((0[469]|11)-(0[1-9]|[12]\d|30)))$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^\\d{4}-(((0[13578]|1[02])-(0[1-9]|[12]\\d|3[0-1]))|(02-(0[1-9]|[12]\\d))|((0[469]|11)-(0[1-9]|[12]\\d|30)))$', 'gm')
const str = `652015-07-017987987
2051-54-45
2222-12-31
2015-07-01
2015-07-32
2015-06-31
2015-02-30
6542015-07-10654654
6542222-12-31654
^[0-9]{4}-(((0[13578]|(10|12))-(0[1-9]|[1-2][0-9]|3[0-1]))|(02-(0[1-9]|[1-2][0-9]))|((0[469]|11)-(0[1-9]|[1-2][0-9]|30)))\$`;
// 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