ladybird/Libraries/LibWeb/FileAPI/File.idl

// https://w3c.github.io/FileAPI/#file-section
[Exposed=(Window,Worker), Serializable]
interface File : Blob {
    constructor(sequence<BlobPart> fileBits, USVString fileName, optional FilePropertyBag options = {});

    readonly attribute DOMString name;
    readonly attribute long long lastModified;
};

dictionary FilePropertyBag : BlobPropertyBag {
    long long lastModified;
};