Converting Youtube Data API V3 video duration format to seconds in JavaScript/Node.js

Question

I\'m trying to convert ISO 8601 string to seconds in JS/Node. The best I could come up with was:

function convert_time(duration) {
    var a = duration.match         


        

Answer 1

If you're using moment.js you can simply call...

moment.duration('PT15M33S').asMilliseconds();

= 933000 ms

Answer 2

My solution:

function convert_time(duration) {
  var total = 0;
  var hours = duration.match(/(\d+)H/);
  var minutes = duration.match(/(\d+)M/);
  var seconds = duration.match(/(\d+)S/);
  if (hours) total += parseInt(hours[1]) * 3600;
  if (minutes) total += parseInt(minutes[1]) * 60;
  if (seconds) total += parseInt(seconds[1]);
  return total;
}

Fiddle

Answer 3

ES6:

const durationToSec = formatted =>
  formatted
    .match(/PT(?:(\d*)H)?(?:(\d*)M)?(?:(\d*)S)?/)
    .slice(1)
    .map(v => (!v ? 0 : v))
    .reverse()
    .reduce((acc, v, k) => (acc += v * 60 ** k), 0);

Answer 4

Assuming the input is valid, we can use the regex exec method to iterate on the string and extract the group sequentially:

const YOUTUBE_TIME_RE = /(\d+)([HMS])/g;
const YOUTUBE_TIME_UNITS = {
    'H': 3600,
    'M': 60,
    'S': 1
}

/**
 * Returns the # of seconds in a youtube time string
 */
function parseYoutubeDate(date: string): number {
    let ret = 0;
    let match: RegExpExecArray;
    while (match = YOUTUBE_TIME_RE.exec(date)) {
        ret += (YOUTUBE_TIME_UNITS[match[2]]) * Number(match[1]);
    }
    return ret;
}

Answer 5

I think using moment.js will be an easier solution. But if someone is looking for a custom solution, here is a simple regex one for you:

var regex = /PT(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?/;
var regex_result = regex.exec("PT1H11S"); //Can be anything like PT2M23S / PT2M / PT28S / PT5H22M31S / PT3H/ PT1H6M /PT1H6S
var hours = parseInt(regex_result[1] || 0);
var minutes = parseInt(regex_result[2] || 0);
var seconds = parseInt(regex_result[3] || 0);
var total_seconds = hours * 60 * 60 + minutes * 60 + seconds;

Answer 6

I realize eval is unpopular, but here's the easiest and fastest approach I can imagine. Enjoy.

function formatDuration(x) {
   return eval(x.replace('PT','').replace('H','*3600+').replace('M','*60+').replace('S', '+').slice(0, -1));
}