snippet

function checkIfFormIsFullyFilled(e) {
    e.preventDefault();
    console.log('button clicked');
    if (startDate.value !== '' && startTime.value !== '' && endDate.value !== '' && endTime.value !== '' && count.value !== '' && interval.value !== '') {
        getValuesAndPlotChart();
    } else {
        warning.style.display = 'block';
    }
}