create default 12 hours tiem data with difference of 1 hour

timechart.js

const getDatesRangeArray = function(startDate, endDate, unit, step) {
    // console.log("getDatesRangeArray", arguments);
    var interval = {
            unit_: unit || 'hours',
            step_: step || 1
        },
        dateArray = [],
        currentDate = startDate;
    // console.log("currentDate", currentDate);
    while (currentDate <= endDate) {
        // console.log('dateArray', dateArray);
        dateArray.push(currentDate);
        currentDate = moment(currentDate).add(interval.step_, interval.unit_).utc().valueOf(); // in milliseconds
        // console.log("new currentDate in while", currentDate);
    }
    // console.log("final dateArray", dateArray);
    return dateArray;
};

const createDefaultTimeChart = function() {
    //console.log("createDefaultLineChart");
    let endHour = moment().utc().valueOf(); // current timestamp
    let startHour = moment(endHour).subtract(11, 'hours').utc().valueOf(); // current timestamp - 12 hours
    getDatesRangeArray(startHour, endHour, 'hours', 1).then(function(timeSheet) {
        console.log("timeSheet", timeSheet);
        // vm.lineGraph.create(timeSheet);
    });
};