javascript 将dd / mm / yyyy格式化为qlikDate值，随意重写本机js

Posted 2021-05-03

// Requires plugin -> https://github.com/jsmreese/moment-duration-format

/**
* Format date string "dd/mm/yyyy" as QlikDate value
*/
function formatAsQlikDate(dateString) {
    var startDate = moment('1899-12-30'); // excel start date
    var selectedDate = moment(dateString);

    // get time difference in seconds
    var dateDifferenceSeconds = selectedDate.diff(startDate);

    // convert to ms to days
    return Math.ceil(moment.duration(dateDifferenceSeconds, 'milliseconds').asDays());
}