How to check if a string is a valid JSON string in JavaScript without using Try/Catch

Question

Something like:

var jsonString = \'{ \"Id\": 1, \"Name\": \"Coke\" }\';

//should be true
IsJsonString(jsonString);

//should be false
IsJsonString(\"foo\");         


        

Answer 1

If you're dealing with a response from an AJAX (or XMLHttpRequest) call, what worked for me is to check the response content type and parse or not the content accordingly.