Removing invalid characters in JavaScript

Question

Can someone provide a regular expression to search and replace illegal characters found

Example, removing �

I am not sure how many types of \'illegal\' char

Answer 1

Invalid characters get converted to 0xFFFD on parsing, so any invalid character codes would get replaced with:

myString = myString.replace(/\uFFFD/g, '')

You can get all types of invalid sorts of chars here