Pls correct my script for script label creation

Question

Hi,
I want to add the script label name in Masterpages only which was in 'Text thread' options. Is this possible by script?
This is my code
var myTextFrame=app.selection[0];
myTextFrame.label="textpage";
var myNextFrame=myTextFrame.nextTextFrame;
while(myNextFrame !=null)
    myNextFrame.label="textpage";
    myNextFrame=myNextFrame.nextTextFrame;
Instead of first line I want to create this script label "textpage" for master page 'text thread' text frame only
Instead of first line I want to create this script label "textpage" for master page 'text thread' text frame only. How to change my script pls help me?
FYI:
by
hasvi

Answer 1

@hasvi – I don't know if I understand you right. Do you want to label every text frame of a story with the same label value? As a starting point you want to work with a selected text frame of that story?
If yes, select a text frame, could be any, and run that snippet:
var textContainersOfStoryArray = app.selection[0].parentStory.textContainers;
for(var n=0;n<textContainersOfStoryArray.length;n++){
    textContainersOfStoryArray[n].label = "textpage";
Or do you mean you want to label the primaryTextFrame of the applied master spread, if you selected something on a "normal" page?
That would be:
//Object selected on "normal" page:
var myPrimeryTextFrame = app.selection[0].parentPage.appliedMaster.primaryTextFrame;
myPrimeryTextFrame.label = "textpage";
Uwe