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Strange behavior of Ext.Date.add component

I have a problem with

Ext.Date.add

When I add days: 

var someDate = new Date(2021, 9, 30);
var startDate = Ext.Date.add(someDate, Ext.Date.DAY,  1);
var endDate = Ext.Date.add(someDate, Ext.Date.DAY,  2);

the values start and end are the same. Why this happens?

Solution

  • I just added true and now everything works fine:

    var startDate = Ext.Date.add(someDate, Ext.Date.DAY,  1, true);
var endDate = Ext.Date.add(someDate, Ext.Date.DAY,  2, true);