Get UTC hours and minutes from local time format, "08:15"

gistfile1.txt

// parameter hmTime is a string containing 5 characters, 
// first two is hours, last to is minutes, which are divied with ':', 
// e.g., "08:15", "17:43"

const _ = require('lodash');

function localHhMmToUtc(hmTime) {
    const splitted = _.split(hmTime, ':')
    const localHours = splitted[0];
    const localMinutes = splitted[1];
    
    const date = new Date()
    const now = new Date(date.getFullYear(), date.getMonth(), date.getDate(), localHours, localMinutes) // UTC
    const utcHours = now.getUTCHours()
    const utcMinutes = now.getUTCMinutes()
    
    return {utcHours, utcMinutes} // returns an object containing UTC hours and minutes, respectively.
}