Question

Is it possible to prototype the File object? I currently have the problem that the File object in Firefox 7+ does not have the fileName attribute any more, but the name attribute.

My code relies extensively on fileName and I would like to find an easier way than changing all occurrences.

Answer 1

Try this:

(function(File){

    if( !File ) {
    return;
    }


    function getFileName(){
    return this.name;
    }

 File.prototype.__defineGetter__( "fileName", getFileName );

})(window.File)

It should have no effect on browsers that have fileName because the prototype is only looked at if it’s not found in a File instance object itself.

jsfiddle: http://jsfiddle.net/Sj3B2/2/ (tested in firefox, chrome and opera)

Edited because opera didn’t support Object.defineProperty