index.js

module.exports = (int, string) => {
    if (!int || !string) {
        throw "Int or String not provided";
        return
    }
    if (string === 'seconds' || string === 'second') {
        return int * 1000
    }
    if (string === 'minutes' || string === 'minute') {
        return int * 60000
    }
    if (string === 'hours' || string === 'hour') {
        return int * 3600000
    }
    if (string === 'days' || string === 'day') {
        return int * 86400000
    }
    if (string === 'months' || string === 'month') {
        var hoursInAMonth = 730.001 // according to the tome of Google
        var millisecondsInAMonth = hoursInAMonth * 3600000
        return int * millisecondsInAMonth
    }
    if (string === 'years' || string === 'year') {
        var hoursInAYear = 8760 // according to the tome of Google
        var millisecondsInAYear = hoursInAYear * 3600000
        return int * millisecondsInAYear
    }
    throw new Error(`Time '${string}' not supported.`)
}