// encode a string into a typed array given an encoding
var uint8array = TextEncoder(encoding).encode(string);
// decode typed array into a string
var string = TextDecoder(encoding).decode(uint8array);
var string = '';
var decoder = TextDecoder(encoding), buffer;
while (buffer = next_chunk()) {
string += decoder.decode(buffer, { stream:true });
}
string += decoder.decode(); // finish the stream
npm install stringencoding