Setting "Number of Pages" for a Parent Page via javascript

[TestriteVisual]

Greetings,

How can I set the "Number of Pages" for a Parent Page to equal 1 or any number via javascript?

Thanks for any help on this 🙂

[m1b · Accepted solution]

To alter the "number of pages" of a parent spread is adjusted by adding or removing the spread's pages. For example:

var doc = app.activeDocument;
$.writeln('Number of pages of first parent spread: ' + doc.masterSpreads[0].pages.length);
doc.masterSpreads[0].pages.add();
$.writeln('Number of pages of first parent spread: ' + doc.masterSpreads[0].pages.length);
doc.masterSpreads[0].pages.lastItem().remove();
$.writeln('Number of pages of first parent spread: ' + doc.masterSpreads[0].pages.length);

[TestriteVisual]

Thanks @m1b , I was able to just add the code below for setting the Parent to 1 page based on your snippet.

graphicTemplate.masterSpreads[0].pages.lastItem().remove();

[Loic.Aigon]

For the info:

doc.masterSpreads[0].pages.lastItem()

can be replaced by

doc.masterSpreads[0].pages[-1];