JSON names require double quotes. JavaScript names don't. JSON

{ "name": "John" }

In JavaScript we can have names without quotes:

{ name: "John" }

In JavaScript, keys can be strings, numbers, or identifier names:

{ 12: "John" }

In

JSON

, values must be one of the following data types:

- a string
- a number
- an object (JSON object)
- an array
- a boolean
- null

In

JavaScript

, values can be all of the above listed types, plus any other valid JavaScript expression, including:

- a function
- a date
- a symbol
- undefined

In

JSON

, string values must be written with double quotes:

{ "name":"John" }

In

JavaScript

, we can write string values with double or single quotes:

{ name: 'John' }