Format duration
JavaScript, Date, Math, String · Oct 22, 2020
Returns the human-readable format of the given number of milliseconds.
- Divide
mswith the appropriate values to obtain the appropriate values forday,hour,minute,secondandmillisecond. - Use
Object.entries()withArray.prototype.filter()to keep only non-zero values. - Use
Array.prototype.map()to create the string for each value, pluralizing appropriately. - Use
Array.prototype.join()to combine the values into a string.
const formatDuration = ms => {
if (ms < 0) ms = -ms;
const time = {
day: Math.floor(ms / 86400000),
hour: Math.floor(ms / 3600000) % 24,
minute: Math.floor(ms / 60000) % 60,
second: Math.floor(ms / 1000) % 60,
millisecond: Math.floor(ms) % 1000
};
return Object.entries(time)
.filter(val => val[1] !== 0)
.map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`)
.join(', ');
};formatDuration(1001); // '1 second, 1 millisecond'
formatDuration(34325055574);
// '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'
