The method date.getDate() is not defined. (The expression 'date.getDate()' returns undefined) This issue is related to using FullCalendar in an Ionic 3 project

Currently, I am working on an Ionic 3 project where I have integrated a FullCalendar plugin to display a calendar UI. However, I encountered an issue while trying to change the background color of a specific day on the calendar within the page module. To address this problem, I utilized the dayRender function provided by FullCalendar.

$('#calendar').fullCalendar({

            dayRender: function (date, cell) {
              var today = new Date('2017-09-11T00:40Z')
              if (date.getDate() == today.getFullYear()) {
                  this.cell.css("background-color", "red");
              }
            },
});

Upon running the code, I received the following runtime error:

'date.getDate()' is not a function. Within the context of 'date.getDate()', 'date.getDate()' is undefined in FullCalendar for Ionic 3.

I find this perplexing as the variable 'date' should be recognized as a Date object which is already defined in the FullCalendar library.

Can anyone provide any potential solutions?

Note: Excuse my poor English proficiency.

javascriptcordovaionic-frameworkfullcalendarfullcalendar-3

Answer №1

The explanation provided in the dayRender callback documentation on this website https://fullcalendar.io/docs/v3/dayRender states

date represents the specific day as a Moment object.

Therefore, in your code, date is a momentJS object, not a Date object. This explains why the getDate method is unavailable for use. It would be more appropriate to also define today as a momentJS object so you can directly compare them:

$('#calendar').fullCalendar({
  dayRender: function (date, cell) {
    var today = moment('2017-09-11T00:00Z');
    if (date.isSame(today, "day")) {
      cell.css("background-color", "red");
    }
  },
  //...
});

For further information on the code snippet I've shared, please refer to http://momentjs.com/docs/#/parsing/string/ for parsing details supported by the moment constructor, and http://momentjs.com/docs/#/query/is-same/ for information on date comparison method.

You can view a live demonstration of the given example here: http://jsfiddle.net/sbxpv25p/22/

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