A script meant to run from a browser's console, on a Udemy course page; to calculate the total time of the course.

udemyCourseTimeCalculator.js

(() => {
    let totalMinutes = 0;
    let totalSeconds = 0;
    Array
        .from(document.querySelectorAll('.lecture__item__link__time'))
        .map(item => item.innerHTML)
        .forEach(itemTime => {
            totalMinutes += parseInt(itemTime.split(':')[0]);
            totalSeconds += parseInt(itemTime.split(':')[1]);
        });
    const totalTimeInMinutes = totalMinutes + (totalSeconds / 60);
    const totalTimeInHours = (totalTimeInMinutes / 60);

    console.log('Total Time (in minutes):', totalTimeInMinutes, 'minutes');
    console.log('Total Time (in hours):', totalTimeInHours, 'hours');
})();