Hi Rajani, You can create a rule for https status code 404 (NOT FOUND) With URLs ending in .js or .css (You profile > setting> error detection > create new rule > http status rule for urls).
Also, the Appmon detects 4xx and 5xx out of box. So you should use those. Also would like to know use case as these minor things should be fixed.
Like I mentioned I do not want to see that URI in my errors dashboard.
I created New HTTP Response Code Rule and added URI as contains not and HTTP response code as 404. Is this configuration is correct?
After this I am still seeing those URI's in error dashboard.