Try this code...
#target photoshop
if (app.documents.length > 0) {
var docRef = app.activeDocument;
var theName = docRef.name.match(/(.*)\.[^\.]+$/)[1];
var docPath = docRef.path;
var theLayer = docRef.layers.getByName('YOUR CASE'); ;
// check if layer is smart object;
if (theLayer.kind != "LayerKind.SMARTOBJECT") {
alert("selected layer is not a smart object")
} else {
// select files;
var theFolder = Folder.selectDialog("select folder");
if (theFolder) {
var theFiles = theFolder.getFiles(/\.(jpg|tif|eps|psd|png)$/i);
// work through the array;
for (var m = 0; m < theFiles.length; m++) {
// replace smart object;
theLayer = replaceContents(theFiles, theLayer);
var theNewName = theFiles.name.match(/(.*)\.[^\.]+$/)[1];
//save jpg;
OutFoldJPG(docPath,theNewName+".jpg",true,12,FormatOptions.STANDARDBASELINE,Extension.LOWERCASE,"JPG");
}
};
}
};
function replaceContents(newFile, theSO) {
app.activeDocument.activeLayer = theSO;
var idplacedLayerReplaceContents = stringIDToTypeID("placedLayerReplaceContents");
var desc3 = new ActionDescriptor();
var idnull = charIDToTypeID("null");
desc3.putPath(idnull, new File(newFile));
var idPgNm = charIDToTypeID("PgNm");
desc3.putInteger(idPgNm, 1);
executeAction(idplacedLayerReplaceContents, desc3, DialogModes.NO);
return app.activeDocument.activeLayer
};
function OutFoldJPG(docPath,dnme,cProfile,jpegQuality,MType,fCase,flagFormat){ //OutFoldTIFF(filePath,fileName,true,TIFFEncoding.TIFFLZW,Extension.LOWERCASE)
var outfolder = new Folder(docPath+"/"+flagFormat);
if (outfolder.exists == false){
outfolder.create();
var saveFile = new File(outfolder + "/" + dnme);
SaveJPG(saveFile,cProfile,jpegQuality,MType,fCase);}
else{
var saveFile = new File(outfolder + "/" + dnme);
SaveJPG(saveFile,cProfile,jpegQuality,MType,fCase);}
}
function SaveJPG(saveFile, jpegQuality,cProfile,formaType,fCase){//12,true,MatteType.NONE
//alert(saveFile+"\n"+cProfile+"\n"+jpegQuality+"\n"+fCase+"\n"+formaType);
jpgSaveOptions = new JPEGSaveOptions();
jpgSaveOptions.embedColorProfile=cProfile;
jpgSaveOptions.formatOptions = formaType//FormatOptions.STANDARDBASELINE;
jpgSaveOptions.matte = MatteType.NONE
jpgSaveOptions.quality = jpegQuality; //1-12
activeDocument.saveAs(saveFile, jpgSaveOptions, true,fCase);
}
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