match ascii characters except few characters

Question

I have a regexp that matches all ascii characters:

/^[\x00-\x7F]*$/

Now I need to exclude from this range the following characters: ', ". How do I do that?

Answer 1

You can use negative lookahead for disallowed chars:

/^((?!['"])[\x00-\x7F])*$/

RegEx Demo

(?!['"]) is negative lookahead to disallow single/double quotes in your input.