const regex = /^(([0-1][0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?)$/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('^(([0-1][0-9]|2[0-3]):[0-5][0-9](:[0-5][0-9])?)$', 'gm')
const str = `17:30
24:00
19:11:07
00:00
00:00:00
23:59
5:50
29:01:02
01:02:03
00:00:59
00:00:60
60:60:60`;
// 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