UTF8 to Shift_JIS in Javascript
Background
The TextEncoder() in js does not support Shift_JIS, which means you may need to find some alternative ways to turn UTF-8 Japanese/Kana character into Shift_JIS encoding format for further handling in your use-case (such as FeliCa chip personalisation).
To verify whether a pair of hex values is in SJIS format - use this site. [1]
Know more about Japanese Character Set
See this presentation by MySQL.
Half-width Katakana in UTF-8
In Unicode, half-width katakana, which is called as hankaku (半角), is represented from position
U+FF61 to U+FF9F.| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | ||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| FF60 | ｡ | ｢ | ｣ | ､ | ･ | ｦ | ｧ | ｨ | ｩ | ｪ | ｫ | ｬ | ｭ | ｮ | ｯ | ||||
| FF70 | ｰ | ｱ | ｲ | ｳ | ｴ | ｵ | ｶ | ｷ | ｸ | ｹ | ｺ | ｻ | ｼ | ｽ | ｾ | ｿ | |||
| FF80 | ﾀ | ﾁ | ﾂ | ﾃ | ﾄ | ﾅ | ﾆ | ﾇ | ﾈ | ﾉ | ﾊ | ﾋ | ﾌ | ﾍ | ﾎ | ﾏ | |||
| FF90 | ﾐ | ﾑ | ﾒ | ﾓ | ﾔ | ﾕ | ﾖ | ﾗ | ﾘ | ﾙ | ﾚ | ﾛ | ﾜ | ﾝ | ﾞ | ﾟ |
Read this article to learn more.
Existing library
If you cannot use external library for any reason
- Implement yourself - use mapping, you can take reference to this script [2]
References
[1] “Hex to SJIS,” freaka.freehostia.com. http://freaka.freehostia.com/charset_js.html (accessed Sep. 24, 2023).
[2] toracatman, “toracatman/UTF-JIS,” GitHub, Jan. 26, 2023. https://github.com/toracatman/UTF-JIS (accessed Sep. 24, 2023).
[3] “Character Width (Half-width, Full-width) Converter Online,” DenCode. https://dencode.com/en/string/character-width (accessed Sep. 24, 2023).
[1], [2], [3]
[1], [2], [3]