big5
Implements the `big5` encoder, as specified by https://encoding.spec.whatwg.org/#big5-encoder
euc-kr
Implements the `euc-kr` encoder, as specified by https://encoding.spec.whatwg.org/#euc-kr-encoder
utf-8
euc-jp
Implements the corresponding encoders, selects the appropriate one when encoding URL search params. If an encoder for the given encoding could not be found, fallback to utf-8.