Save Layers to SVG.jsx

if(app.documents.length > 0)
{
    var docRef = app.activeDocument;
    var myDestination = Folder.selectDialog("Choose a save destination");
    if(myDestination){
        saveLayersToFolder(myDestination);
    }
}

function copyDocument(doc){
    var preset = new DocumentPreset();
    preset.width = doc.width;
    preset.height = doc.height;
    preset.colorMode = doc.documentColorSpace;
    preset.units = doc.rulerUnits;

    var copy = app.documents.addDocument(doc.documentColorSpace, preset);
    return copy;
}

function copyLayer(from, to){
    to.artworkKnockout = from.artworkKnockout;
    to.blendingMode = from.blendingMode;
    to.color = from.color;
    to.dimPlacedImages = from.dimPlacedImages;
    to.isIsolated = from.isIsolated;
    to.name = from.name;
    to.opacity = from.opacity;
    to.preview = from.preview;
    to.printable = from.printable;
    to.sliced = from.sliced;
    to.typename = from.typename;

    var items = from.pageItems;
    copyLayerItems(items, to);

    return to;
}

function copyLayerItems(items, to){
    for(var i=0; i<items.length; ++i){
        var item = items[i].duplicate(to, ElementPlacement.PLACEATEND);
    }
}

function saveLayersToFolder(folder){
    hideAllLayers(docRef);
    
    var totalLayers = docRef.layers.length;
    var layerIndex;
    var layer;
    for(layerIndex = 0; layerIndex < totalLayers; layerIndex++)
    {
        layer = docRef.layers[layerIndex];        
        layer.visible = true;

        var copyDoc = copyDocument(docRef);
        var copyDocLayer = copyLayer(layer, copyDoc.layers.add());
        
        var saveAsFileName = folder.fullName + "/" + layer.name + ".svg";
        var saveOpts = new ExportOptionsSVG();
        var saveType = ExportType.SVG;
        var saveFile = new File(saveAsFileName);
        
        saveOpts.DTD = SVGDTDVersion.SVG1_0;
        saveOpts.documentEncoding = SVGDocumentEncoding.UTF8;
        saveOpts.cssProperties = SVGCSSPropertyLocation.PRESENTATIONATTRIBUTES;
        
        copyDoc.exportFile(saveFile, saveType, saveOpts);
        layer.visible = false;
        copyDoc.close();
        copyDoc = null;
    }
}

function hideAllLayers(document){    
    var totalLayers = document.layers.length;
    var layerIndex;
    var layer;
    for(layerIndex = 0; layerIndex < totalLayers; layerIndex++)
    {
        layer = document.layers[layerIndex];
        layer.visible = false;
    }
}