Invert Selection #code_aeft

invert.jsx

// Inverts selected layers in the Active Comp

var active = app.project.activeItem;
if (active && active instanceof CompItem) {
    var layerLen = active.layers.length;
    for (var i = 1; i < layerLen + 1; i++)
        active.layers[i].selected = active.layers[i].selected === false;
}