I have to sum some hours and show total above 24hours.
example:
const result = moment('00:00:00', 'HH:mm:ss');
result.add(moment.duration('10:00:00'))
result.add(moment.duration('10:00:00'))
result.add(moment.duration('06:00:00'))
console.log(result.format('HH:mm:ss'));
the output is 02:00:00 and i want it to be 26:00:00.
Sounds like you want a duration as a result, not a date. So use a duration instead:
const result = moment.duration();
result.add(moment.duration('10:00:00'))
result.add(moment.duration('10:00:00'))
result.add(moment.duration('06:00:00'))
console.log(result.asHours());
// print 26
console.log(`${result.asHours()}:${result.minutes}:${result.seconds}`);
// print 26:00:00