Move the content of the active artboard to a new layer in Adobe Illustrator

ArtboardToNewLayer.jsx

/*
  Move the content of the active artboard to a new layer
  Discussion: https://community.adobe.com/t5/illustrator-discussions/move-layers-groups-and-masks-to-new-layer/td-p/13256473
  Author: Sergey Osokin, email: [email protected]
  Check my other scripts: https://github.com/creold
  
  Donate (optional):
  If you find this script helpful, you can buy me a coffee
  - via Buymeacoffee https://www.buymeacoffee.com/aiscripts
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  - via QIWI https://qiwi.com/n/OSOKIN
*/

//@target illustrator
app.preferences.setBooleanPreference('ShowExternalJSXWarning', false); // Fix drag and drop a .jsx file

// Main function
function main() {
  if (!/illustrator/i.test(app.name)) {
    alert('Error\nRun script from Adobe Illustrator');
    return false;
  }

  if (!documents.length) {
    alert('Error\nOpen a document and try again');
    return false;
  }

  var doc = activeDocument;
  
  selection = null;
  redraw();
  doc.selectObjectsOnActiveArtboard();
  
  if (selection.length) {
    var idx = doc.artboards.getActiveArtboardIndex(),
        lyr = doc.layers.add();
    lyr.name = doc.artboards[idx].name;
    lyr.color = selection[0].layer.color;
    for (var i = 0; i < selection.length; i++) {
      selection[i].move(lyr, ElementPlacement.PLACEATEND);
    }
    selection = null;
    redraw();
  }
}

// Run script
try {
  main();
} catch (e) {}

More about script in Telegram channel.

Alexander Ladygin has a similar script artboardItemsMoveToNewLayer, which has additional options in the dialog mode.