Check if a key exists inside a json object

Question

amt: \"10.00\"
email: \"sam@gmail.com\"
merchant_id: \"sam\"
mobileNo: \"9874563210\"
orderID: \"123456\"
passkey: \"1234\"

The above is the JSON o

Answer 1

you can do like this:

if("merchant_id" in thisSession){ /** will return true if exist */
 console.log('Exist!');
}

or

if(thisSession["merchant_id"]){ /** will return its value if exist */
 console.log('Exist!');
}