JSON response format error - red dot\bullet before response

Question

I am sending an AJAX request expecting JSON response. However, the returned JSON is preceded with a red dot\\bullet which is causing a parse error.

Here is a screens

Answer 1

If your files are encoding with UTF-8, better to encode them with UTF-8 without BOM. This can be easily done through notepad++. The steps are as follows,

1. Open your files in notepad++.
2. Go to Encoding option on the file menu.
3. Then select the option "convert to UTF-8 without BOM".

This may resolve your problem.