overwrite a file with HTML5 FileWriter

Question

I\'m using HTML5 FileWriter API to save the state of my webapp. I have bit of JS that periodically calls FileWriter.write to do that (so , over time, the

Answer 1

Here is a correct code that won't waste 500ms on waiting

fileWriter.onwriteend = function() {
    if (fileWriter.length === 0) {
        //fileWriter has been reset, write file
        fileWriter.write(blob);
    } else {
        //file has been overwritten with blob
        //use callback or resolve promise
    }
};
fileWriter.truncate(0);