var BlobBuilder = window.BlobBuilder || window.MozBlobBuilder || window.WebKitBlobBuilder || window.MSBlobBuilder;

var bb = new BlobBuilder();

bb.append(arr.stString());

0

down vote

accepted

Got it working with your code. I only had to change some little detail:

if(e.name == 'TypeError' && window.BlobBuilder){

        var bb = new BlobBuilder();

        bb.append(data);

        out = bb.getBlob(datatype);

        console.debug("case 2");

    }

bb.append(data); // data must be with no brackets

My function(constructor) that works now for all browsers:

var NewBlob = function(data, datatype)

{

    var out;

    try {

        out = new Blob([data], {type: datatype});

        console.debug("case 1");

    }

    catch (e) {

        window.BlobBuilder = window.BlobBuilder ||

                window.WebKitBlobBuilder ||

                window.MozBlobBuilder ||

                window.MSBlobBuilder;

        if (e.name == 'TypeError' && window.BlobBuilder) {

            var bb = new BlobBuilder();

            bb.append(data);

            out = bb.getBlob(datatype);

            console.debug("case 2");

        }

        else if (e.name == "InvalidStateError") {

            // InvalidStateError (tested on FF13 WinXP)

            out = new Blob([data], {type: datatype});

            console.debug("case 3");

        }

        else {

            // We're screwed, blob constructor unsupported entirely

            console.debug("Errore");

        }

    }

    return out;

}