Double Byte to Single Byte (JS)

double-to-single-byte.js

var input = 'Ｔａｒｏ　Ｓｕｚｕｋｉ 234２３４２３４456456';
var output = input
                .replace(/[Ａａ]/g, 'A')
                .replace(/[Ｂｂ]/g, 'B')
                .replace(/[Ｃｃ]/g, 'C')
                .replace(/[Ｄｄ]/g, 'D')
                .replace(/[Ｅｅ]/g, 'E')
                .replace(/[Ｆｆ]/g, 'F')
                .replace(/[Ｇｇ]/g, 'G')
                .replace(/[Ｈｈ]/g, 'H')
                .replace(/[Ｉｉ]/g, 'I')
                .replace(/[Ｊｊ]/g, 'J')
                .replace(/[Ｋｋ]/g, 'K')
                .replace(/[Ｌｌ]/g, 'L')
                .replace(/[Ｍｍ]/g, 'M')
                .replace(/[Ｎｎ]/g, 'N')
                .replace(/[Ｏｏ]/g, 'O')
                .replace(/[Ｐｐ]/g, 'P')
                .replace(/[Ｑｑ]/g, 'Q')
                .replace(/[Ｒｒ]/g, 'R')
                .replace(/[Ｓｓ]/g, 'S')
                .replace(/[Ｔｔ]/g, 'T')
                .replace(/[Ｕｕ]/g, 'U')
                .replace(/[Ｖｖ]/g, 'V')
                .replace(/[Ｗｗ]/g, 'W')
                .replace(/[Ｘｘ]/g, 'X')
                .replace(/[Ｙｙ]/g, 'Y')
                .replace(/[Ｚｚ]/g, 'Z')
                .replace(/[１]/g, '1')
                .replace(/[２]/g, '2')
                .replace(/[３]/g, '3')
                .replace(/[４]/g, '4')
                .replace(/[５]/g, '5')
                .replace(/[６]/g, '6')
                .replace(/[７]/g, '7')
                .replace(/[８]/g, '8')
                .replace(/[９]/g, '9')
                .replace(/[０]/g, '0')
                .replace(/[　]/g, ' ')
                .toUpperCase();

// Input: Ｔａｒｏ　Ｓｕｚｕｋｉ 234２３４２３４456456
// Output: TARO SUZUKI 234234234456456
console.log('Input: ' + input);
console.log('Output: ' + output);