Using the HTML5 FileWriter truncate() method?

Question

I\'m experimenting with the HTML5 File API, and I\'m needing to use a method which I don\'t know enough about (simply because it\'s hardly documented anywhere).

I\'m tal

Answer 1

Something like this might be a little more to the point:

truncate Changes the length of the file to that specified

fileEntry.createWriter(function(fileWriter) {
    var truncated = false;
    fileWriter.onwriteend = function(e) {
        if (!truncated) {
            truncated = true;
            this.truncate(this.position);
            return;
        }
        console.log('Write completed.');
    };
    fileWriter.onerror = function(e) {
        console.log('Write failed: ' + e.toString());
    };
    var blob = new Blob(['helo'], {type: 'plain/text'});
    fileWriter.write(blob);
}, errorHandler);