script that rasterizes selected elements to a single image in Illustrator

I used what I found on the web and managed to make a script that works the way I wanted. It's not the most beautiful, kind of Frankenstein 🙂
If anyone would like to simplify it - I'd be happy to learn something.

// removes everything out of the artboard

app.executeMenuCommand ("selectallinartboard");
app.executeMenuCommand ("Inverse menu item");
app.executeMenuCommand ("clear");

// select all

app.executeMenuCommand("selectall");

// group
app.executeMenuCommand("group");

// rasterize
var Rasterizer = function (resolution) {
this.doc = app.activeDocument;
this.selection = this.doc.selection;
this.options = new RasterizeOptions();
this.options.resolution = resolution || 200;
this.options.transparency = true;
this.options.antiAliasingMethod = AntiAliasingMethod.ARTOPTIMIZED;
};
Rasterizer.prototype.run = function () {
var n = this.selection.length;
for (var i = 0; i < n; i++) {
var sourceArt = this.selection[i];
var clipBounds = sourceArt.visibleBounds;
this.doc.rasterize(sourceArt, clipBounds, this.options);
}
};
var rasterizer = new Rasterizer();
rasterizer.run();