ENCODING API

The Encoding API allows for converting between strings and typed arrays. The specification introduces four global classes for performing these conversions: TextEncoder, TextEncoderStream, TextDecoder, and TextDecoderStream.

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NOTE   Support for stream encoding/decoding is much narrower than bulk encoding/decoding.

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Encoding Text

The Encoding API affords two ways of converting a string into its typed array binary equivalent: a bulk encoding, and a stream encoding. When going from string to typed array, the encoder will always use UTF-8.

Bulk Encoding

The bulk designation means that the JavaScript engine will synchronously encode the entire string. For very long strings, this can be a costly operation. Bulk encoding is accomplished using an instance of a TextEncoder:

const textEncoder = new TextEncoder();

This instance exposes an encode() method, which accepts a string and returns each character's UTF-8 encoding inside a freshly created Uint8Array...