Does InDesign support EPS files?

Solved it by using this javascript script:

// Open a file dialog to select files, allowing multiple selections
var selectFiles = File.openDialog("Select your files", function(file){ return file instanceof File; }, true);

// Check if files were selected
if (selectFiles) {
    // Open or create a new document in InDesign
    var doc;
    if (app.documents.length === 0) {
        doc = app.documents.add();
    } else {
        doc = app.activeDocument;
    }

    // Iterate over each selected file and place it on a new page
    for (var i = 0; i < selectFiles.length; i++) {
        if (i !== 0) { // Create a new page for all files except the first one
            doc.pages.add();
        }

        // Activate the page where the file will be placed
        var currentPage = doc.pages[i];

        // Place the file on the current page
        currentPage.place(File(selectFiles[i]));

        // Adjust page view
        app.activeWindow.activePage = currentPage;
    }
} else {
    throw new Error("No files were selected!");
}

which involves fetching an EPS file and adding/placing it into the active document...

When attempting to open an EPS file using InDesign...

There seems to be some confusion about whether you are placing or opening—maybe show your code? With JS an example would be something like this:

var f = File.openDialog("Select the file", "");
var p = app.activeWindow.activePage.place(File(f));
alert("Placed File Format: " + p[0].constructor.name);

InDesign can open all native InDesign types, like INDD, IDML, INDT, INDB, INDL, etc and in the beta also PDF. Many others, also EPS are supported via Import/Place. But EPS is an old file type and should be avoided. It is used for old files and some company sell graphics as EPS. Internal InDesign uses EPS for some functiuonality, like the QR codes, but it is not really visible for users. EPS has no future. What should your plugin make, which advantage will it have for the users. Many plugins are for experienced ID users useless and loose with the next update their functionality. I avoid those plugins.

@Karomi0D4D

What your extension is supposed to be doing?

And no offence, but before you start building extensions - you should learn how InDesign works. 

Otherwise, you'll be asking a lot of questions like this - completely avoidable. 

As Steve says.

InDesign opens InDesign files only including INDD, INDT, IDML. Anything else must be placed in the current document using the File > Place command.

Hi @Karomi0D4D , InDesign supports placing and exporting EPS. Have you tested an EPS saved out of either Illustrator or Photoshop?

EPS is a very old graphic format. 

You said, "When attempting to open an EPS file using InDesign,..." but InDesign cannot OPEN an EPS. It can only PLACE an EPS file.