Illustrator Script - Batch Export Symbols as SVGs

ExportSymbolsAsSVG.jsx

var doc = app.activeDocument;
var symbolCount = doc.symbols.length;

if (symbolCount >= 1) {

    if (confirm("Are all your layers hidden?")) {

        // choose directory
        var dest = Folder(doc.path).selectDlg();

        // folder chosen
        if (dest) {
          
            // create temp layer
            doc.layers.add();
            
            // create temp artboard
            doc.artboards.add(doc.artboards[0].artboardRect);
            
            // get temp artboard
            var tempAB = doc.artboards.getActiveArtboardIndex();

            // loop through symbols
            for (var i = 0; i < doc.symbols.length; i++) {

                // place a symbol instance - temp
                var symbol = doc.symbolItems.add(doc.symbols[i]);
                
                // resize artboard
                doc.artboards[tempAB].artboardRect = doc.visibleBounds;
                app.redraw();

                // choose directory
                var filename = doc.symbols[i].name;

                // export symbols
                saveSVG(dest, filename);

                // delete temp symbol instance
                symbol.remove();
            }
            // remove temp layer
            doc.layers[0].remove();
            
            // remove temp artboard
            doc.artboards[tempAB].remove();
        }
    }

    function saveSVG(dest, filename) {
        // save options
        var type = ExportType.SVG;
        var options = new ExportOptionsSVG();

        // file
        var file = new File(dest + "/" + filename);

        // export
        doc.exportFile(file, type, options);
    }

} else {
    alert("You don't have any symbols in this document");
}

Note: Any images seem to be repeatedly copied over with the svgs for some reason.. The only fix at the moment is to ensure you don't have any images in the document

Note: This script seems to have issues since Illustrator added dynamic symbols. I wouldn't recommend using it.