Question

I have a script that outputs code with lots of ASCII escape sequences pertaining to color (for example, \033[91m changes the color of the text to red when printed to a terminal). I’d like to try to output this to HTML, so I tried this:

str = str.replace(new RegExp('\033[91m', 'g'),
                 '<span style="color:#ff0011">')
         /*.replace more such codes*/;

However, I get the following error:

SyntaxError: Invalid regular expression: /[91m/: Unterminated character class

How can I fix that?

Answer 1

Change it to '\033\\[91m'. I.e. you have to escape the '[' so that it doesn’t think you are giving it a list of characters to match in that position.