Check if a key exists inside a JSON object

Question

amt: "10.00" email: "[email protected]" merchant_id: "sam" mobileNo: "9874563210" orderID: "123456" passkey: "1234" 

The above is the JSON object I'm dealing with. I want to check if the merchant_id key exists. I tried the below code, but it's not working. Any way to achieve it?

<script> window.onload = function getApp() {   var thisSession = JSON.parse('<?php echo json_encode($_POST); ?>');   //console.log(thisSession);   if (!("merchant_id" in thisSession)==0)   {     // do nothing.   }   else    {     alert("yeah");   } } </script> 

Answer 1

Try this,

if(thisSession.hasOwnProperty('merchant_id')){  } 

the JS Object thisSession should be like

{ amt: "10.00", email: "[email protected]", merchant_id: "sam", mobileNo: "9874563210", orderID: "123456", passkey: "1234" } 

you can find the details here