Question

I have a regular expression

var p = /\bj[^\b]*?\b/gi;

I need to make the ‘j’ a variable value, but when i do the following;-

var p = new RegExp('\\b'+'${0}'+'[^\\b]*?\\b', 'gi');

I get error –

Uncaught SyntaxError: Invalid regular expression: /\b${0}[^\b]*?\b/: Nothing to repeat 

Any help appreciated.

Thank you

Answer 1

Sorry guys, I should have been more clear, the value ‘{0}’ is a token that will be replaced and not a variable. The error was occurring because ‘{‘ and ‘}’ are special characters in regular expressions.

So changing the token pattern fixed the problem

var p = new RegExp('\\b'+'%text%'+'[^\\b]*?\\b', 'gi');