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How to skip character in capture group in JavaScript Regexp?

You cannot skip a character in a capture group. A match is always consecutive, even when it contains things like zero-width assertions.

Example

However, you can access the matched groups in a regular expression like the following code −

<html>
   <head>
      <script>
         var str = "Username akdg_amit";
         var myReg = /(?:^|\s)akdg_(.*?)(?:\s|$)/g;
         
         var res = myReg.exec(str);
         document.write(res[1]);
      </script>
   </head>
   
   <body>
   </body>
</html>