The TextDecoder
interface represents a decoder for a specific text encoding, such as UTF-8
, ISO-8859-2
, KOI8-R
, GBK
, etc. A decoder takes a stream of bytes as input and emits a stream of code points.
The TextDecoder
interface doesn't inherit any properties.
-
TextDecoder.encoding
Read only
-
A string containing the name of the decoder, which is a string describing the method the TextDecoder
will use.
-
TextDecoder.fatal
Read only
-
A Boolean
indicating whether the error mode is fatal.
-
TextDecoder.ignoreBOM
Read only
-
A Boolean
indicating whether the byte order mark is ignored.
The TextDecoder
interface doesn't inherit any methods.
TextDecoder.decode()
-
Returns a string containing the text decoded with the method of the specific TextDecoder
object.
This example shows how to decode a Chinese/Japanese character , as represented by five different typed arrays: Uint8Array
, Int8Array
, Uint16Array
, Int16Array
, and Int32Array
.
let utf8decoder = new TextDecoder();
let u8arr = new Uint8Array([240, 160, 174, 183]);
let i8arr = new Int8Array([-16, -96, -82, -73]);
let u16arr = new Uint16Array([41200, 47022]);
let i16arr = new Int16Array([-24336, -18514]);
let i32arr = new Int32Array([-1213292304]);
console.log(utf8decoder.decode(u8arr));
console.log(utf8decoder.decode(i8arr));
console.log(utf8decoder.decode(u16arr));
console.log(utf8decoder.decode(i16arr));
console.log(utf8decoder.decode(i32arr));
In this example, we decode the Russian text "Привет, мир!", which means "Hello, world." In our TextDecoder()
constructor, we specify the Windows-1251 character encoding, which is appropriate for Cyrillic script.
const win1251decoder = new TextDecoder("windows-1251");
const bytes = new Uint8Array([
207, 240, 232, 226, 229, 242, 44, 32, 236, 232, 240, 33,
]);
console.log(win1251decoder.decode(bytes));