js how to change string encoding?

Question

Character encoding

Hello.
Always use encoding:
var file = evt.target.files[0];
varreader = new FileReader();
reader.readAsText(file,"CP1251");
reader.onload = function(event) {
var csvData = event.target.result;
}

Answer 1

reader.readAsText(file, 'CP1251') - doesn't help?