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What is the difference between a JS object literal and a JSON string?

I have a confusion about what exactly people mean by Object Literals, JSON, JavaScript Objects, for me they seem similar:

{foo: 'bar', bar : 'baz'}

AFAIK, above is the object literal, json, and also the javascript object, right?

Does the object have literal and json the same?

How do you guys distinguish what it is?

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6 answers

JSON is just a data format like XML. True JSON should have keys surrounded by double quotes, for example:

{"foo":"bar"}

JavaScript objects are part of the JavaScript language and are associated with things like a prototype.

javascript , new Object.create().

//object literal
var foo = {};

//equivalent
var foo = new Object();
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jsonString JSON:

var jsonString = '{"foo": "bar", "bar" : "baz"}'

javascriptObject javascript, :

var javascriptObject =  {foo: 'bar', bar : 'baz'}

json- javascript JSON.parse JSON.stringify.

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// this is a JSON variable
var json = '{"foo": "bar", "bar" : "baz"}';

// obj is a JavaScript obj, defined by the object literal on the right hand side
var obj = {foo: 'bar', bar : 'baz'};
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JS JSON

var obj = JSON.parse( json );

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var json = JSON.stringify( obj );
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JSON all, , .

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{"foo": "bar", "bar": "baz"}
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Literal:

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Javascript:

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JSON:

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An object literal - object.

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(As a rule, there is a strictness that allows all languages ​​to use it, we cannot use it functionas a value, keyit should always be in double quotes (this is not necessary in the object literal))

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