How to run any script on selected layers only? (not all layers)

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@Stephen Marsh wrote:

There are many examples of such scripts in the forum if you search, I'll post an example later.

 

EDIT: Here you go!

 

#target photoshop

/* Start Process selected layers - from jazz-y */
var s2t = stringIDToTypeID;
(r = new ActionReference()).putProperty(s2t('property'), p = s2t('targetLayersIDs'));
r.putEnumerated(s2t('document'), s2t('ordinal'), s2t('targetEnum'));
var lrs = executeActionGet(r).getList(p),
    sel = new ActionReference();

for (var i = 0; i < lrs.count; i++) {
    sel.putIdentifier(s2t('layer'), p = lrs.getReference(i).getIdentifier(s2t('layerID')));
    (r = new ActionReference()).putIdentifier(s2t('layer'), p);
    (d = new ActionDescriptor()).putReference(s2t("target"), r);
    executeAction(s2t('select'), d, DialogModes.NO);
/* End Process selected layers - from jazz-y */

// Your code here:
alert(activeDocument.activeLayer.name);

}

P.S. You will have to rework the original code to replace the code which affects all layers with the code for the selected layers.

Edit: And another option...

#target photoshop

if (app.documents.length > 0) {
    var myDocument = app.activeDocument;
    myDocument.suspendHistory("Undo script...", "main(myDocument)");
}

function main() {
    var theLayers = getSelectedLayersIdx();
    for (var p = 0; p < theLayers.length; p++) {
        selectLayerByIndex(theLayers[p], false);

        // Your code here
        alert(activeDocument.activeLayer.name);

    }
}


///// Functions /////

function selectLayerByIndex(index, add) {
    add = undefined ? add = false : add
    var ref = new ActionReference();
    ref.putIndex(charIDToTypeID("Lyr "), index);
    var desc = new ActionDescriptor();
    desc.putReference(charIDToTypeID("null"), ref);
    if (add) desc.putEnumerated(stringIDToTypeID("selectionModifier"), stringIDToTypeID("selectionModifierType"), stringIDToTypeID("addToSelection"));
    desc.putBoolean(charIDToTypeID("MkVs"), false);
    try {
        executeAction(charIDToTypeID("slct"), desc, DialogModes.NO);
    } catch (e) {
        alert(e.message);
    }
}

// by paul mr
function getSelectedLayersIdx() {
    var selectedLayers = new Array;
    var ref = new ActionReference();
    ref.putEnumerated(charIDToTypeID("Dcmn"), charIDToTypeID("Ordn"), charIDToTypeID("Trgt"));
    var desc = executeActionGet(ref);
    if (desc.hasKey(stringIDToTypeID('targetLayers'))) {
        desc = desc.getList(stringIDToTypeID('targetLayers'));
        var c = desc.count
        var selectedLayers = new Array();
        for (var i = 0; i < c; i++) {
            try {
                activeDocument.backgroundLayer;
                selectedLayers.push(desc.getReference(i).getIndex());
            } catch (e) {
                selectedLayers.push(desc.getReference(i).getIndex() + 1);
            }
        }
    } else {
        var ref = new ActionReference();
        ref.putProperty(charIDToTypeID("Prpr"), charIDToTypeID("ItmI"));
        ref.putEnumerated(charIDToTypeID("Lyr "), charIDToTypeID("Ordn"), charIDToTypeID("Trgt"));
        try {
            activeDocument.backgroundLayer;
            selectedLayers.push(executeActionGet(ref).getInteger(charIDToTypeID("ItmI")) - 1);
        } catch (e) {
            selectedLayers.push(executeActionGet(ref).getInteger(charIDToTypeID("ItmI")));
        }
    }
    return selectedLayers;
}

sir, if you see my message notification please provide similar code that works with CS6 in following post for answer. i will test your answer and accept soon. 

https://community.adobe.com/t5/photoshop-ecosystem-discussions/fix-quot-the-command-get-is-not-currently-available-quot-in-cs6/m-p/13931549#M743823