const regex = /(\d{4})-(\d{2})-(\d{2})(?:[T ](\d{2}):(\d{2}):(\d{2})(?:\.(\d{0,7}))?(?:([+-])(\d{2}):(\d{2}))?)?/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('(\\d{4})-(\\d{2})-(\\d{2})(?:[T ](\\d{2}):(\\d{2}):(\\d{2})(?:\\.(\\d{0,7}))?(?:([+-])(\\d{2}):(\\d{2}))?)?', 'gm')
const str = `2020-01-01T00:00:00.000000+04:07
2020-01-01 00:00:00.000000-04:07
2020-01-01 00:00:00.000000Z
2020-01-01
2020-01`;
// 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