javascript - Uncaught SyntaxError: Unexpected token with JSON.parse

Question

what causes this error on the third line?

var products = [{
  "name": "Pizza",
  "price": "10",
  "quantity": "7"
}, {
  "name": "Cerveja",
  "price": "12",
  "quantity": "5"
}, {
  "name": "Hamburguer",
  "price": "10",
  "quantity": "2"
}, {
  "name": "Fraldas",
  "price": "6",
  "quantity": "2"
}];
console.log(products);
var b = JSON.parse(products); //unexpected token o

Answer 1

products is an object. (creating from an object literal)

JSON.parse() is used to convert a string containing JSON notation into a Javascript object.

Your code turns the object into a string (by calling .toString()) in order to try to parse it as JSON text.
The default .toString() returns "[object Object]", which is not valid JSON; hence the error.