const regex = /(?<year>[\d]{4})-(?<month>0[1-9]|1[1-2])-(?<day>0[1-9]|[1-2][0-9]|3[0-1])T(?<hour>[0-1][0-9]|2[0-3]):(?<minute>[0-5][0-9]):(?<second>[0-5][0-9])(?:Z|.(?<millisecond>[0-9]{2,3}))/gmi;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(?<year>[\\d]{4})-(?<month>0[1-9]|1[1-2])-(?<day>0[1-9]|[1-2][0-9]|3[0-1])T(?<hour>[0-1][0-9]|2[0-3]):(?<minute>[0-5][0-9]):(?<second>[0-5][0-9])(?:Z|.(?<millisecond>[0-9]{2,3}))', 'gmi')
const str = `2021-03-31T19:52:52.01
2021-03-31T19:52:52Z
2021-11-31T19:52:52.010
2021-12-31T19:52:52Z
2021-12-31T23:52:52Z`;
// 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