UXP Script to select the layer directly above/under the currently selected layer including hidden?

Continued here:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/how-to-improve-this-script-performance-get-all-layers-id/m-p/14784442

I don't know if this is possible with UXP DOM code, however, with UXP batchPlay, it should, in theory, be the same as when using an action:

Perhaps you could tidy this up (I don't know UXP):

// Select Forward Invisible Layer.psjs

async function selectForwardInvisibleLayer() {
    let result;
    let psAction = require("photoshop").action;

    let command = [
        // Show current layer
        { "_obj": "show", "null": [{ "_enum": "ordinal", "_ref": "layer", "_value": "targetEnum" }], "toggleOptionsPalette": true },
        // Select forward layer
        { "_obj": "select", "_target": [{ "_enum": "ordinal", "_ref": "layer", "_value": "forwardEnum" }], "makeVisible": false },
        // Show current layer
        { "_obj": "show", "null": [{ "_enum": "ordinal", "_ref": "layer", "_value": "targetEnum" }], "toggleOptionsPalette": true }
    ];
    result = await psAction.batchPlay(command, {});
}

async function runModalFunction() {
    await require("photoshop").core.executeAsModal(selectForwardInvisibleLayer, { "commandName": "Action Commands" });
}

await runModalFunction();

// Select Backward Invisible Layer.psjs

async function selectBackwardInvisibleLayer() {
    let result;
    let psAction = require("photoshop").action;

    let command = [
        // Show current layer
        { "_obj": "show", "null": [{ "_enum": "ordinal", "_ref": "layer", "_value": "targetEnum" }], "toggleOptionsPalette": true },
        // Select backward layer
        { "_obj": "select", "_target": [{ "_enum": "ordinal", "_ref": "layer", "_value": "backwardEnum" }], "makeVisible": false },
        // Show current layer
        { "_obj": "show", "null": [{ "_enum": "ordinal", "_ref": "layer", "_value": "targetEnum" }], "toggleOptionsPalette": true }
    ];
    result = await psAction.batchPlay(command, {});
}

async function runModalFunction() {
    await require("photoshop").core.executeAsModal(selectBackwardInvisibleLayer, { "commandName": "Action Commands" });
}

await runModalFunction();

I'm sure that there are better ways!