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This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for usage in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the specification changes.
TextEncoder takes a stream of code points as input and emits a stream of bytes. For a more scalable, non-native library, see StringView
– a C-like representation of strings based on typed arrays.
Note: Firefox, Chrome and Opera had support for encoding types other than utf-8 (such as: utf-16, iso-8859-2, koi8, cp1261, and gbk). As of Firebox 48 (ticket), Chrome 54 (ticket) and Opera 41, no other encoding types are available other than utf-8, in order to match the spec. In all cases, passing in an encoding type to the constructor will be ignored and a utf-8 TextEncoder will be created (Note: the TextDecoder still allows for other decoding types).
There is a polyfill implementation to support all the legacy encoding in github.
Properties
The TextEncoder
interface doesn't inherit any property.
TextEncoder.encoding
Read only- Is a
DOMString
containing the name of the encoder, that is a string describing the method theTextEncoder
will use.
Constructor
TextEncoder()
- Returns a newly constructed
TextEncoder
that will generate a byte stream with utf-8 encoding.
Methods
The TextEncoder
interface doesn't inherit any method.
TextEncoder.encode()
- Returns a
Uint8Array
containing utf-8 encoded text.
Specifications
Specification | Status | Comment |
---|---|---|
Encoding The definition of 'TextEncoder' in that specification. |
Candidate Recommendation | Initial definition. |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|
Basic support | 38 | 19.0 (19.0) [1] | No support | 25 | No support |
Available in Web Workers | 38 | 20.0 (20.0) | No support | 25 | No support |
Feature | Android | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | No support | 19.0 (19.0) [1] | 1.0.1 (19.0) | No support | ? | No support |
Available in Web Workers | No support | 20.0 (20.0) | 1.0.1 (20.0) | No support | ? | No support |
[1] An earlier, and slightly different, version of the specification was implemented in Firefox 18.
[2] As of Firefox 48, Chrome 54 and Opera 41, no other encoding types are allowed other than utf-8.
See also
- The
TextDecoder
interface describing the inverse operation. StringView
– a C-like representation of strings based on typed arrays- A shim allowing to use this interface in browsers that don't support it.
- Components.utils.importGlobalProperties