JavaScript - hours, minutes, seconds, millisecond to floating point seconds for html audio

Question

I need to convert a string with hours, minutes, seconds and milliseconds "hh:mm:ss:mil" to the floating-point number that HTML audio player uses for currentTime.

I can't find any conversion algorithm that does this! The closest I've found converts to seconds as integers, while I need something like this

"00:00:38:000" -> 38.0 (NOT 2280)

"01:15:02:773" -> 4502.773

My Code so far - but it's wrong

function time2secs(time) {
    // 00:03:30 -> 3.5 seconds
    var t = time.split(':');
    if (t.length < 4) t[3] = 0; // if a missing millisecs, then set it to 0

    var seconds = parseInt(t[0]) * 60 * 60 + parseInt(t[1]) * 60 + parseInt(t[2]) + parseInt(t[3]) / 1000;

    return seconds / 60;
}

Answer 1

try this

function timeToSec(time){
    var arr=time.split(":");
  return parseInt(arr[0])*3600+ parseInt(arr[1])*60+ parseInt(arr[2])+ parseInt(arr[3])*0.1000
}
console.log(timeToSec("00:00:38:000" ))
console.log(timeToSec("01:15:02:773" ))