How to conditionally fail requests based on request counts

Mock an API response to fail on the first try and succeed on the second attempt. This can be easily done using shared state.

Note: $sharedState is only available in extension version > 24.8.13 and desktop app > v1.7.1

Steps to conditionally fail requests are:

1. Create a new modify response rule

2. Select dynamic javascript modification

3. Write javascript code to conditionally fail requests based on request counts

   Copyfunction modifyResponse(args) {
     const {method, url, response, responseType, requestHeaders, requestData, responseJSON} = args;
     // Change response below depending upon request attributes received in args
     let count=$sharedState.count ?? 0;
     ++count;
     $sharedState.count=count;
   
     // Succeed if it is not the first request
     if($sharedState.count>0){
       return response;
     } else {
       return null;
     }
   }