如上编码
ZERO WIDTH SPACE 在各个语言的表达。
JS中使用 var b = a.replace(/\u200B/g,''); 来替换，去掉 ZERO WIDTH SPACE 。
http://www.fileformat.info/info/unicode/char/200b/index.htm
| Encodings | |
|---|---|
| HTML Entity (decimal) | ​ |
| HTML Entity (hex) | ​ |
| How to type in Microsoft Windows | Alt +200B |
| UTF-8 (hex) | 0xE2 0x80 0x8B (e2808b) |
| UTF-8 (binary) | 11100010:10000000:10001011 |
| UTF-16 (hex) | 0x200B (200b) |
| UTF-16 (decimal) | 8,203 |
| UTF-32 (hex) | 0x0000200B (200b) |
| UTF-32 (decimal) | 8,203 |
| C/C++/Java source code | "\u200B" |
| Python source code | u"\u200B" |
