Replace String Can't Work!

Hi All,
I have a little problem , there is reponse view on console

in that case , i already replace string : \n , \r, \t with nothing .

As i show you on first picture , the response didn’t replace string \n \r, anyone can explain me how i can delete that string?

As far as I know, the request object is read-only, so you can’t make any changes to it.

Try building your request body in the pre-request script so that you have full control over it.