Save Active Layer Name As File

Answers have already been given; I just wanted to point out that you can now drag a layer, say, directly to the Desktop (or any other folder in the File Explorer / macOS Finder) to simulate the Quick Export as PNG.

(It is insane that Adobe doesn't monitor this community to supply direct solutions to questions like this). @gangeek  you can use the built-in feature called "Image Assets" under the File > Generate menu in Photoshop. Here is more about the feature, including the ability to export files to specific directories: https://helpx.adobe.com/photoshop/using/generate-assets-layers.html

I have composites built with individual pictures I want saved out as the layer name.  So a background will show up behind each layer of a kids photo.... Is there a way to save the shown layer as a file, or even to automate the process so that layer saves, turns off the layer, turns on the next layer, saves as that layer name, turns off the layer, turns on the next layer,.....  But the background won't change and other layers won't change either.  Does that make sense?

Success!

Thanks you to both JJMack and c.pfaffenbichler, you both contribute to the forums are most helpful and invaluable, each and every time. 

Here is final code which will save current layer to jpeg in specified folder:

// save jpg of active layer;
// 2020, use it at your own risk;
if (app.documents.length > 0) {
var myDocument = app.activeDocument;

var theName = myDocument.name;
var thePath = "/c/MyFolder"
 
var theName = myDocument.activeLayer.name;
// duplicate;
var myDocument = app.activeDocument.duplicate("theCopy", false);
hideOthers ();
// jpg options;
var jpgopts = new JPEGSaveOptions();
jpgopts.embedProfile = true;
jpgopts.formatOptions = FormatOptions.STANDARDBASELINE;
jpgopts.matte = MatteType.NONE;
jpgopts.quality = 10;
myDocument.saveAs((new File(thePath+"/"+theName+".jpg")),jpgopts,true);
// close;
myDocument.close(SaveOptions.DONOTSAVECHANGES);
};
////// hide others //////
function hideOthers () {
	// =======================================================
	var idShw = charIDToTypeID( "Shw " );
		var desc2 = new ActionDescriptor();
		var idnull = charIDToTypeID( "null" );
			var list1 = new ActionList();
				var ref1 = new ActionReference();
				var idLyr = charIDToTypeID( "Lyr " );
				var idOrdn = charIDToTypeID( "Ordn" );
				var idTrgt = charIDToTypeID( "Trgt" );
				ref1.putEnumerated( idLyr, idOrdn, idTrgt );
			list1.putReference( ref1 );
		desc2.putList( idnull, list1 );
		var idTglO = charIDToTypeID( "TglO" );
		desc2.putBoolean( idTglO, true );
	executeAction( idShw, desc2, DialogModes.NO );
	};

// save jpg of active layer;
// 2020, use it at your own risk;
if (app.documents.length > 0) {
var myDocument = app.activeDocument;
try {
var theName = myDocument.name.match(/(.*)\.[^\.]+$/)[1];
var thePath = myDocument.path;
}
catch (e) {
var theName = myDocument.name;
var thePath = "~/Desktop"
};
var theName = myDocument.activeLayer.name;
// duplicate;
var myDocument = app.activeDocument.duplicate("theCopy", false);
hideOthers ();
// jpg options;
var jpgopts = new JPEGSaveOptions();
jpgopts.embedProfile = true;
jpgopts.formatOptions = FormatOptions.STANDARDBASELINE;
jpgopts.matte = MatteType.NONE;
jpgopts.quality = 10;
myDocument.saveAs((new File(thePath+"/"+theName+".jpg")),jpgopts,true);
// close;
myDocument.close(SaveOptions.DONOTSAVECHANGES);
};
////// hide others //////
function hideOthers () {
	// =======================================================
	var idShw = charIDToTypeID( "Shw " );
		var desc2 = new ActionDescriptor();
		var idnull = charIDToTypeID( "null" );
			var list1 = new ActionList();
				var ref1 = new ActionReference();
				var idLyr = charIDToTypeID( "Lyr " );
				var idOrdn = charIDToTypeID( "Ordn" );
				var idTrgt = charIDToTypeID( "Trgt" );
				ref1.putEnumerated( idLyr, idOrdn, idTrgt );
			list1.putReference( ref1 );
		desc2.putList( idnull, list1 );
		var idTglO = charIDToTypeID( "TglO" );
		desc2.putBoolean( idTglO, true );
	executeAction( idShw, desc2, DialogModes.NO );
	};

There is a basic problem with your what you want to do.  A layer can contain transparency and be larger or smaller then the document canvas size. Jpeg file format does not support transparency only has support for a background layer. That will crop the layer to canvas size fill empty area with background colored pixels and blend in color into transparent areas.

Hello my dear creator,

You want to save the active layer as a .jpeg file right? First of all select the layer you want to save it as a seperate file then right click on the layer > Export as 

Select the format and click the Export button.

I hope this will helps you.

Thank you my dear creator.