JS Convert "Kana" one from another (zen-kaku, han-kaku and more)

convert_kana.js

/**
 * Convert "Kana" one from another
 * (zen-kaku, han-kaku and more)
 *
 * @param string str
 * @param string option (optionaly)
 * @return string converted string
 */
function convert_kana (str, option) {
    option = option || "KV";
    if (option.match('K')) {
        if (option.match('V')) {
            // han-kaku katakana (with daku-ten) to zen-kaku kata-kana
            str = str.replace(/([\uff66\uff73\uff76-\uff84\uff8a-\uff8e\uff9c])\uff9e/g, function(m, c){
                var f = {
                    0xff76:0x30ac, 0xff77:0x30ae, 0xff78:0x30b0, 0xff79:0x30b2, 0xff7a:0x30b4,
                    0xff7b:0x30b6, 0xff7c:0x30b8, 0xff7d:0x30ba, 0xff7e:0x30bc, 0xff7f:0x30be,
                    0xff80:0x30c0, 0xff81:0x30c2, 0xff82:0x30c5, 0xff83:0x30c7, 0xff84:0x30c9,
                    0xff8a:0x30d0, 0xff8b:0x30d3, 0xff8c:0x30d6, 0xff8d:0x30d9, 0xff8e:0x30dc,
                    0xff73:0x30f4, 0xff9c:0x30f7, 0xff66:0x30fa
                };
                return String.fromCharCode(f[c.charCodeAt(c)]);
            })
            .replace(/([\uff8a-\uff8e])\uff9f/g, function(m, c){
                var f = {
                    0xff8a:0x30d1, 0xff8b:0x30d4, 0xff8c:0x30d7, 0xff8d:0x30da, 0xff8e:0x30dd
                };
                return String.fromCharCode(f[c.charCodeAt(c)]);
            });
        }
        // han-kaku kata-kana to zen-kaku kata-kana
        str = str.replace(/[\uff61-\uff9d]/g, function(c){
            var m = {
                0xff61:0x3002, 0xff62:0x300c, 0xff63:0x300d, 0xff64:0x3001, 0xff65:0x30fb,
                0xff66:0x30f2, 0xff67:0x30a1, 0xff68:0x30a3, 0xff69:0x30a5, 0xff6a:0x30a7,
                0xff6b:0x30a9, 0xff6c:0x30e3, 0xff6d:0x30e5, 0xff6e:0x30e7, 0xff6f:0x30c3,
                0xff70:0x30fc, 0xff71:0x30a2, 0xff72:0x30a4, 0xff73:0x30a6, 0xff74:0x30a8,
                0xff75:0x30aa, 0xff76:0x30ab, 0xff77:0x30ad, 0xff78:0x30af, 0xff79:0x30b1,
                0xff7a:0x30b3, 0xff7b:0x30b5, 0xff7c:0x30b7, 0xff7d:0x30b9, 0xff7e:0x30bb,
                0xff7f:0x30bd, 0xff80:0x30bf, 0xff81:0x30c1, 0xff82:0x30c4, 0xff83:0x30c6,
                0xff84:0x30c8, 0xff85:0x30ca, 0xff86:0x30cb, 0xff87:0x30cc, 0xff88:0x30cd,
                0xff89:0x30ce, 0xff8a:0x30cf, 0xff8b:0x30d2, 0xff8c:0x30d5, 0xff8d:0x30d8,
                0xff8e:0x30db, 0xff8f:0x30de, 0xff90:0x30df, 0xff91:0x30e0, 0xff92:0x30e1,
                0xff93:0x30e2, 0xff94:0x30e4, 0xff95:0x30e6, 0xff96:0x30e8, 0xff97:0x30e9,
                0xff98:0x30ea, 0xff99:0x30eb, 0xff9a:0x30ec, 0xff9b:0x30ed, 0xff9c:0x30ef,
                0xff9d:0x30f3
            };
            return String.fromCharCode(m[c.charCodeAt(0)]);
        });
    } else if (option.match('H')) {
        if (option.match('V')) {
            // han-kaku kata-kana (with daku-ten) to zen-kaku hira-gana
            str = str.replace(/([\uff73\uff76-\uff84\uff8a-\uff8e])\uff9e/g, function(m, c){
                var f = {
                    0xff73:0x3094,
                    0xff76:0x304c, 0xff77:0x304e, 0xff78:0x3050, 0xff79:0x3052, 0xff7a:0x3054,
                    0xff7b:0x3056, 0xff7c:0x3058, 0xff7d:0x305a, 0xff7e:0x305c, 0xff7f:0x305e,
                    0xff80:0x3060, 0xff81:0x3062, 0xff82:0x3065, 0xff83:0x3067, 0xff84:0x3069,
                    0xff8a:0x3070, 0xff8b:0x3073, 0xff8c:0x3076, 0xff8d:0x3079, 0xff8e:0x307c
                    //0xff9c:0x30f7, 0xff66:0x30fa // vwa vwo
                };
                return String.fromCharCode(f[c.charCodeAt(c)]);
            })
            .replace(/([\uff8a-\uff8e])\uff9f/g, function(m, c){
                var f = {
                    0xff8a:0x3071, 0xff8b:0x3074, 0xff8c:0x3077, 0xff8d:0x307a, 0xff8e:0x307d
                };
                return String.fromCharCode(f[c.charCodeAt(c)]);
            });
        }
        // han-kaku kata-kana to zen-kaku hira-gana
        str = str.replace(/[\uff61-\uff9d]/g, function(c){
            var f = {
                0xff61:0x3002, 0xff62:0x300c, 0xff63:0x300d, 0xff64:0x3001, 0xff65:0x30fb,
                0xff66:0x3092, 0xff67:0x3041, 0xff68:0x3043, 0xff69:0x3045, 0xff6a:0x3047,
                0xff6b:0x3049, 0xff6c:0x3083, 0xff6d:0x3085, 0xff6e:0x3087, 0xff6f:0x3063,
                0xff70:0x30fc, 0xff71:0x3042, 0xff72:0x3044, 0xff73:0x3046, 0xff74:0x3048,
                0xff75:0x304a, 0xff76:0x304b, 0xff77:0x304d, 0xff78:0x304f, 0xff79:0x3051,
                0xff7a:0x3053, 0xff7b:0x3055, 0xff7c:0x3057, 0xff7d:0x3059, 0xff7e:0x305b,
                0xff7f:0x305d, 0xff80:0x305f, 0xff81:0x3061, 0xff82:0x3064, 0xff83:0x3066,
                0xff84:0x3068, 0xff85:0x306a, 0xff86:0x306b, 0xff87:0x306c, 0xff88:0x306d,
                0xff89:0x306e, 0xff8a:0x306f, 0xff8b:0x3072, 0xff8c:0x3075, 0xff8d:0x3078,
                0xff8e:0x307b, 0xff8f:0x307e, 0xff90:0x307f, 0xff91:0x3080, 0xff92:0x3081,
                0xff93:0x3082, 0xff94:0x3084, 0xff95:0x3086, 0xff96:0x3088, 0xff97:0x3089,
                0xff98:0x308a, 0xff99:0x308b, 0xff9a:0x308c, 0xff9b:0x308d, 0xff9c:0x308f,
                0xff9d:0x3093
            };
            return String.fromCharCode(f[c.charCodeAt(0)]);
        });
    } else if (option.match('k')) {
        // zen-kaku kata-kana to han-kaku kata-kana
        str = str.replace(/[\u3001\u3002\u300c\u300d\u30a1-\u30ab\u30ad\u30af\u30b1\u30b3\u30b5\u30b7\u30b9\u30bb\u30bd\u30bf\u30c1\u30c3\u30c4\u30c6\u30c8\u30ca-\u30cf\u30d2\u30d5\u30d8\u30db\u30de\u30df-\u30ed\u30ef\u30f2\u30f3\u30fb]/g, function(c){
            var f = {
                0x3001:0xff64, 0x3002:0xff61, 0x300c:0xff62, 0x300d:0xff63, 0x30a1:0xff67,
                0x30a2:0xff71, 0x30a3:0xff68, 0x30a4:0xff72, 0x30a5:0xff69, 0x30a6:0xff73,
                0x30a7:0xff6a, 0x30a8:0xff74, 0x30a9:0xff6b, 0x30aa:0xff75, 0x30ab:0xff76,
                0x30ad:0xff77, 0x30af:0xff78, 0x30b1:0xff79, 0x30b3:0xff7a, 0x30b5:0xff7b,
                0x30b7:0xff7c, 0x30b9:0xff7d, 0x30bb:0xff7e, 0x30bd:0xff7f, 0x30bf:0xff80,
                0x30c1:0xff81, 0x30c3:0xff6f, 0x30c4:0xff82, 0x30c6:0xff83, 0x30c8:0xff84,
                0x30ca:0xff85, 0x30cb:0xff86, 0x30cc:0xff87, 0x30cd:0xff88, 0x30ce:0xff89,
                0x30cf:0xff8a, 0x30d2:0xff8b, 0x30d5:0xff8c, 0x30d8:0xff8d, 0x30db:0xff8e,
                0x30de:0xff8f, 0x30df:0xff90, 0x30e0:0xff91, 0x30e1:0xff92, 0x30e2:0xff93,
                0x30e3:0xff6c, 0x30e4:0xff94, 0x30e5:0xff6d, 0x30e6:0xff95, 0x30e7:0xff6e,
                0x30e8:0xff96, 0x30e9:0xff97, 0x30ea:0xff98, 0x30eb:0xff99, 0x30ec:0xff9a,
                0x30ed:0xff9b, 0x30ef:0xff9c, 0x30f2:0xff66, 0x30f3:0xff9d, 0x30fb:0xff65
            };
            return String.fromCharCode(f[c.charCodeAt(0)]);
        }).replace(/[\u30ac\u30ae\u30b0\u30b2\u30b4\u30b6\u30b8\u30ba\u30bc\u30be\u30c0\u30c2\u30c5\u30c7\u30c9\u30d0\u30d3\u30d6\u30d9\u30dc\u30f4\u30f7\u30fa]/g, function(c){
            // with daku-ten
            var f = {
                0x30ac:0xff76, 0x30ae:0xff77, 0x30b0:0xff78, 0x30b2:0xff79, 0x30b4:0xff7a,
                0x30b6:0xff7b, 0x30b8:0xff7c, 0x30ba:0xff7d, 0x30bc:0xff7e, 0x30be:0xff7f,
                0x30c0:0xff80, 0x30c2:0xff81, 0x30c5:0xff82, 0x30c7:0xff83, 0x30c9:0xff84,
                0x30d0:0xff8a, 0x30d3:0xff8b, 0x30d6:0xff8c, 0x30d9:0xff8d, 0x30dc:0xff8e,
                0x30f4:0xff73, 0x30f7:0xff9c, 0x30fa:0xff66
            }
            return String.fromCharCode(f[c.charCodeAt(0)]) + "\uff9e";
        }).replace(/[\u30d1\u30d4\u30d7\u30da\u30dd]/g, function(c){
            // with han-daku-ten
            var f = {
                0x30d1:0xff8a, 0x30d4:0xff8b, 0x30d7:0xff8c, 0x30da:0xff8d, 0x30dd:0xff8e
            }
            return String.fromCharCode(f[c.charCodeAt(0)]) + "\uff9f";
        })
        ;
    } else if (option.match('h')) {
        // zen-kaku hira-gana to han-kaku kata-kana
        str = str.replace(/[\u3001\u3002\u300c\u300d\u3041-\u304b\u304d\u304f\u3051\u3053\u3055\u3057\u3059\u305b\u305d\u305f\u3061\u3063\u3064\u3066\u3068\u306a-\u306f\u3072\u3075\u3078\u307b\u307e\u307f-\u308d\u308f\u3092\u3093\u30fb]/g, function(c){
            var f = {
                0x3001:0xff64, 0x3002:0xff61, 0x300c:0xff62, 0x300d:0xff63, 0x3041:0xff67,
                0x3042:0xff71, 0x3043:0xff68, 0x3044:0xff72, 0x3045:0xff69, 0x3046:0xff73,
                0x3047:0xff6a, 0x3048:0xff74, 0x3049:0xff6b, 0x304a:0xff75, 0x304b:0xff76,
                0x304d:0xff77, 0x304f:0xff78, 0x3051:0xff79, 0x3053:0xff7a, 0x3055:0xff7b,
                0x3057:0xff7c, 0x3059:0xff7d, 0x305b:0xff7e, 0x305d:0xff7f, 0x305f:0xff80,
                0x3061:0xff81, 0x3063:0xff6f, 0x3064:0xff82, 0x3066:0xff83, 0x3068:0xff84,
                0x306a:0xff85, 0x306b:0xff86, 0x306c:0xff87, 0x306d:0xff88, 0x306e:0xff89,
                0x306f:0xff8a, 0x3072:0xff8b, 0x3075:0xff8c, 0x3078:0xff8d, 0x307b:0xff8e,
                0x307e:0xff8f, 0x307f:0xff90, 0x3080:0xff91, 0x3081:0xff92, 0x3082:0xff93,
                0x3083:0xff6c, 0x3084:0xff94, 0x3085:0xff6d, 0x3086:0xff95, 0x3087:0xff6e,
                0x3088:0xff96, 0x3089:0xff97, 0x308a:0xff98, 0x308b:0xff99, 0x308c:0xff9a,
                0x308d:0xff9b, 0x308f:0xff9c, 0x3092:0xff66, 0x3093:0xff9d, 0x30fb:0xff65
            };
            return String.fromCharCode(f[c.charCodeAt(0)]);
        }).replace(/[\u304c\u304e\u3050\u3052\u3054\u3056\u3058\u305a\u305c\u305e\u3060\u3062\u3065\u3067\u3069\u3070\u3073\u3076\u3079\u307c\u3094]/g, function(c){
            // with daku-ten
            var f = {
                0x304c:0xff76, 0x304e:0xff77, 0x3050:0xff78, 0x3052:0xff79, 0x3054:0xff7a,
                0x3056:0xff7b, 0x3058:0xff7c, 0x305a:0xff7d, 0x305c:0xff7e, 0x305e:0xff7f,
                0x3060:0xff80, 0x3062:0xff81, 0x3065:0xff82, 0x3067:0xff83, 0x3069:0xff84,
                0x3070:0xff8a, 0x3073:0xff8b, 0x3076:0xff8c, 0x3079:0xff8d, 0x307c:0xff8e,
                0x3094:0xff73
            };
            return String.fromCharCode(f[c.charCodeAt(0)]) + "\uff9e";
        }).replace(/[\u3071\u3074\u3077\u307a\u307d]/g, function(c){
            // with han-daku-ten
            var f = {
                0x3071:0xff8a, 0x3074:0xff8b, 0x3077:0xff8c, 0x307a:0xff8d, 0x307d:0xff8e
            };
            return String.fromCharCode(f[c.charCodeAt(0)]) + "\uff9f";
        })
        ;
    }
    if (option.match('c')) {
        // zen-kaku kata-kana to zen-kaku hira-gana
        str = str.replace(/[\u30a1-\u30f6]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) - 0x0060)
        });
    } else if (option.match('C')) {
        // zen-kaku hira-gana to zen-kaku kata-kana
        str = str.replace(/[\u3041-\u3086]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) + 0x0060)
        });
    }
    if (option.match('r')) {
        // zen-kaku alphabets to han-kaku
        str = str.replace(/[\uff21-\uff3a\uff41-\uff5a]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) - 0xFee0)
        });
    } else if (option.match('R')) {
        // han-kaku alphabets to zen-kaku
        str = str.replace(/[A-Za-z]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) + 0xFee0)
        });
    }
    if (option.match('n')) {
        // zen-kaku numbers to han-kaku
        str = str.replace(/[\uff10-\uff19]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) - 0xfee0);
        });
    } else if (option.match('N')) {
        // han-kaku numbers to zen-kaku
        str = str.replace(/[\u0030-\u0039]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) + 0xfee0);
        });
    }
    // Characters included in "a", "A" options are
    // "!" - "~" excluding '"', "'", "\", "~"
    if (option.match('a')) {
        // zen-kaku alphabets and numbers to han-kaku
        str = str.replace(/[\uff01\uff03-\uff06\uff08-\uff3b\uff3d-\uff5d]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) - 0xfee0);
        });
    } else if (option.match('A')) {
        // han-kaku alphabets and numbers to zen-kaku
        str = str.replace(/[\u0021\u0023-\u0026\u0028-\u005b\u005d-\u007d]/g, function(c){
            return String.fromCharCode(c.charCodeAt(0) + 0xfee0);
        });
    }
    if (option.match('s')) {
        // zen-kaku space to han-kaku
        str = str.replace(/\u3000/g, "\u0020");
    } else if (option.match('S')) {
        // han-kaku space to zen-kaku
        str = str.replace(/\u0020/g, "\u3000");
    }
    return str;
}

/**
 * test
 *
var str = [
    "　！”＃＄％＆’（）＊＋，－．／",
    " !\"#$%&'()*+,-./",
    "０１２３４５６７８９",
    "0123456789",
    "：；＜＝＞？＠",
    ":;<=>?@",
    "ＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ",
    "ABCDEFGHIJKLMNOPQRSTUVWXYZ",
    "［￥］＾＿",
    "[\\]^_",
    "ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚ",
    "abcdefghijklmnopqrstuvwxyz",
    "｛｜｝～",
    "{|}~",
    "。「」、・をぁぃぅぇぉゃゅょっーあいうえおかきくけこさしすせそたちつてとなにぬねのはひふへほまみむめもやゆよらりるれろわん",
    "｡｢｣､･ｦｧｨｩｪｫｬｭｮｯｰｱｲｳｴｵｶｷｸｹｺｻｼｽｾｿﾀﾁﾂﾃﾄﾅﾆﾇﾈﾉﾊﾋﾌﾍﾎﾏﾐﾑﾒﾓﾔﾕﾖﾗﾘﾙﾚﾛﾜﾝ",
    "。「」、・ヲァィゥェォャュョッーアイウエオカキクケコサシスセソタチツテトナニヌネノハヒフヘホマミムメモヤユヨラリルレロワン",
    "がぎぐげござじずぜぞだぢづでどばびぶべぼゔヷヺぱぴぷぺぽ",
    "ｶﾞｷﾞｸﾞｹﾞｺﾞｻﾞｼﾞｽﾞｾﾞｿﾞﾀﾞﾁﾞﾂﾞﾃﾞﾄﾞﾊﾞﾋﾞﾌﾞﾍﾞﾎﾞｳﾞﾜﾞｦﾞﾊﾟﾋﾟﾌﾟﾍﾟﾎﾟ",
    "ガギグゲゴザジズゼゾダヂヅデドバビブベボヴヷヺパピプペポ"
].join("\n");
console.log(util.convert_kana(str, "sah"));
console.log(util.convert_kana(str, "SAH"));
console.log(util.convert_kana(str, "rnk"));
console.log(util.convert_kana(str, "RNK"));
console.log(util.convert_kana(str, "c"));
console.log(util.convert_kana(str, "C"));
console.log(util.convert_kana(str, "AV"));
console.log(util.convert_kana(str, "KV"));
//*/

Thank you for your share. It's very very useful for me.
But It seems should be fixed for "s" and "S" options param.
"u0020" is hankaku space, and "u3000" is zenkaku.

So, it should be changed to:

if (option.match('s')) {
// zen-kaku space to han-kaku
str = str.replace(/\u3000/g, "\u0020");
} else if (option.match('S')) {
// han-kaku space to zen-kaku
str = str.replace(/\u0020/g, "\u3000");
}

👍

Thank you so much ! It's very useful 🙇

You are awesome 🙇🏿‍♂️

Your function is not correct, expect: ヒラガナ