javascript FileReader - parsing long file in chunks

I have long file I need to parse. Because it's very long I need to do it chunk by chunk. I tried this:

function parseFile(file){
    var chunkSize = 2000;
    var fileSize = (file.size - 1);

    var foo = function(e){
        console.log(e.target.result);
    };

    for(var i =0; i < fileSize; i += chunkSize)
    {
        (function( fil, start ) {
            var reader = new FileReader();
            var blob = fil.slice(start, chunkSize + 1);
            reader.onload = foo;
            reader.readAsText(blob);
        })( file, i );
    }
}

After running it I see only the first chunk in the console. If I change 'console.log' to jquery append to some div I see only first chunk in that div. What about other chunks? How to make it work?