Do the JSON keys have to be surrounded by Double quotes?

https://stackoverflow.com/a/949469/2413870

https://medium.com/@alifabdullah/never-confuse-json-and-javascript-object-ever-again-7c32f4c071ad

→ Yes, JSON Keys are to be surrounded by Double Quotes
→ JavaScript objects do not contain single or double quote marks around the keys when no spacing is used in the key name.

var person= {first name: “Depp”, address: “earth”}; //invalid// To prevent this error:
var person= {“first name”: “Depp”, "address": “earth”};