How to select the last history state

[mauricior6328708]

Hello!

This script selects the first history state.

var doc = app.activeDocument;
doc.activeHistoryState = doc.historyStates [0];

independently of the quandity of historical states, how do I select only the last one?

Thank you.

[SuperMerlin · Accepted solution]

var doc = app.activeDocument;  
doc.activeHistoryState = doc.historyStates[doc.historyStates.length-1]; 

[mauricior6328708]

Perfect! Thank you SuperMerlin

[wckdTall-2]

Any way to add logic to find out what the active history state is? I want to make a conditional toggle, to go from 0 to Max. But it doesn't look like activeHistoryState shows that info.

app.activeDocument.activeHistoryState
------------------------
1) name=Deselect
2) parent=[Document example.psd]
3) snapshot=false
4) typename=HistoryState

[wckdTall-2]

This seems to function the way I want, it's just a little more binary since I can't lookup the number, but I guess that's not necessarily a bad thing.

//History State 0 is open document
aD = app.activeDocument;
aH = aD.activeHistoryState;
aHL = aD.historyStates.length;
if(aH != aD.historyStates[aHL-1]) aD.activeHistoryState = aD.historyStates[aHL-1];
else{aD.activeHistoryState = aD.historyStates[0]}