Access dateTimePicker elsewhere in javascript

[cwolcott]

Is there any other way to access the dateTimePicker later in javascript other than the global variable?

seriesDate = new tempusDominus.TempusDominus(document.getElementById('datetimepicker1'));

We define a modal once in the code based on the code above. When we click an Edit button we need to populate the value of the dateTimePicker, but how can we access the already created element?

I know how to populate the value, but not how to access the element other than through the global variable.

[Eonasdan]

This is being tracked #2792