https://efficiencydesign.booth.pm/items/3814234

RenameLayer.jsx

//----------------------------------------------------
//ダイアログ設定
//----------------------------------------------------
setDialog = function(inputText){
    var win = new Window("dialog", "レイヤー名変更");
    var myText = win.add("edittext", [0, 0, 400, 300], "", {multiline: true});
    myText.text = inputText;
    myText.active = true;

    win.add ("button", undefined, "OK");
    win.add ("button", undefined, "Cancel");

    if (win.show () == 1){
        myName = myText.text;
        changeName(layers_obj);//アートボード名変更
    }
    else{
        return;
    }
}
//----------------------------------------------------

var layers_obj = activeDocument.layers;

checkName(layers_obj);

var old_Name = set_Name.join("\n");
setDialog(old_Name);

function checkName(target)
{
    set_Name = [];
    var n = target.length;
    for (var i=0; i<n; i++)
    {
        var set_old_Name = target[i].name;
        set_Name.push(set_old_Name);
    }
}

function changeName(target)
{
    var new_Name = [];
    new_Name = myName.split("\n");
    var n = target.length;
    for (var i=0; i<n; i++)
    {
        var set_new_Name = new_Name[i];
        target[i].name = set_new_Name;
    }
}

RenameObject.jsx

//----------------------------------------------------
//ダイアログ設定
//----------------------------------------------------
setDialog = function(inputText){
    var win = new Window("dialog", "オブジェクト名一括変更");
    var myText = win.add("edittext", [0, 0, 400, 300], "", {multiline: true});
    myText.text = inputText;
    myText.active = true;

    win.add ("button", undefined, "OK");
    win.add ("button", undefined, "Cancel");

    if (win.show () == 1){
        myName = myText.text;
        changeName(selObj);
    }
    else{
        return;
    }
}
//----------------------------------------------------

var selObj = activeDocument.selection;

checkName(selObj);

var old_Name = set_Name.join("\n");
setDialog(old_Name);

function checkName(target)
{
    set_Name = [];
    var n = target.length;
    for (var i=0; i<n; i++)
    {
        var set_old_Name = target[i].name;
        set_Name.push(set_old_Name);
    }
}

function changeName(target)
{
    var new_Name = [];
    new_Name = myName.split("\n");
    var n = target.length;
    for (var i=0; i<n; i++)
    {
        var set_new_Name = new_Name[i];
        target[i].name = set_new_Name;
    }
}