encoding - JavaScript function to convert UTF8 string between fullwidth and halfwidth forms

Question

EDIT: Thanks to GOTO 0, I now know exactly what I my question is called.

I need a JavaScript function to convert from UTF-8 fullwidth form to halfwidth form.

Answer 1

Apperently, you want to convert halfwidth and fullwidth form characters to their equivalent basic latin forms. If this is correct, you can do a replacement using a regular expression. Something like this should work:

var x = "！ａｂｃ　ＡＢＣ！";
var y = x.replace(
    /[uff01-uff5e]/g,
    function(ch) { return String.fromCharCode(ch.charCodeAt(0) - 0xfee0); }
    );

Where x is your input string and y is the output.