files/en-us/web/api/textdecoderstream/writable/index.md
{{APIRef("Encoding API")}}{{AvailableInWorkers}}
The writable read-only property of the {{domxref("TextDecoderStream")}} interface returns a {{domxref("WritableStream")}} that accepts binary data, in the form of {{jsxref("ArrayBuffer")}}, {{jsxref("TypedArray")}}, or {{jsxref("DataView")}} chunks ({{jsxref("SharedArrayBuffer")}} and its views are also allowed), to be decoded into strings.
A {{domxref("WritableStream")}}.
This example creates a TextDecoderStream that decodes UTF-8 encoded binary data. It writes some encoded binary data to the writable stream, then reads the decoded text from the readable stream.
const stream = new TextDecoderStream();
// Write data to be decoded
const data = Uint8Array.fromBase64("5L2g5aW95LiW55WM");
const writer = stream.writable.getWriter();
writer.write(data);
writer.close();
// Read decoded data
const reader = stream.readable.getReader();
let done = false;
let output = "";
while (!done) {
const result = await reader.read();
if (result.value) {
output += result.value;
}
done = result.done;
}
console.log(output);
{{Specifications}}
{{Compat}}