function getDays(startDate) {
    
    
    const sDate = Date.parse(startDate);
    const eDate = new Date();
    if (sDate > eDate) {
    
    
        return 0
    }
    if (sDate === eDate) {
    
    
        return 1
    }
    const days = (eDate - sDate) / (1 * 24 * 60 * 60 * 1000)
    return parseInt(days)
}
console.log("与当前时间相差    "+getDays("2022-08-13 14:15:21")+"    天");