Javascript | add json object to empty json array

Question

I have a empty json array.

shoppingCart: []

I have a json object.

let product = {"name": "name", "price": "price", "quantity": "quantity", "logoPath": "logoPath"};

I am trying to add json object to json array.

let obj = JSON.parse(state.shoppingCart);
obj.push(product);
state.shoppingCart = JSON.stringify(obj);

I got this error:

"SyntaxError: Unexpected end of JSON input"

I wanna add many object to empy array like that:

shoppingCart: [{id: 1, name: name1}, {id: 2, name: name2}, {id: 3, name: name3}]

Where is my mistake?

What does the literal state of shoppingCart and product look like at the time of .push()? — symlink
– symlink, Commented Apr 8, 2020 at 15:16
for your information, first code is not a json array, this is an empty javascript object litteral. JSON is a data format, "coded" as a string ; same thing with the second code — Pierre
– Pierre, Commented Apr 8, 2020 at 15:23

symlink · Accepted Answer · 2020-04-08 15:27:04Z

4

Skip the line where you try to JSON.parse() shoppingCart

let shoppingCart = []

let product = {
  "name": "name", 
  "price": "price", 
  "quantity": "quantity", 
  "logoPath": "logoPath"
}

//let obj = JSON.parse(shoppingCart)
shoppingCart.push(product)
shoppingCart = JSON.stringify(shoppingCart)

console.log(shoppingCart)

answered Apr 8, 2020 at 15:27

symlink

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דודו שטראוס · Accepted Answer · 2020-04-08 15:34:31Z

1

I'm not sure I understood the question clearly...but if you want arr of json is go something like this:

let arr = []
let myObj1 = {"name": "name1", "price": 1, "quantity": 1, "logoPath": "logoPath1"};
let myObj2 = {"name": "name"2, "price": 2, "quantity": 2, "logoPath": "logoPath2"};
arr.push(myObj1)
arr.push(myObj2)
console.log(arr)

hope that is helpful

answered Apr 8, 2020 at 15:34

דודו שטראוס

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