eval() works but JSON.parse() and $.parseJSON() doesn't work

Question

I have a string returned from the server in my object property : (R.Message)

    "{
        error:{
            titleName:"||BroadcastableException_Title",
            errorDescriptionName:"||BroadcastableException_Description",
            errorMessageParameters:"",
            message:"\u003cb\u003e\u003ci\u003eBroadcast\u0027s status has been changed \u003c/i\u003e\u003c/b\u003e",
            stackTrace:" XXXX\\XXX.asmx.cs:line 851"
        }
    }"

I can use

(eval('(' + R.Message + ')')

But JSON.parse dosen't work

JSON.parse(R.Message)

I have this error :

Uncaught Invalid JSON: {error: {titleName:"||BroadcastableException_Title",errorDescrip .

Why Eval function can create object from this string but JSOn.parse can't?

I tried $parseJSON and I got the same error.

Because JSON is not synonym for JavaScript. Your string is just not JSON. — Álvaro González
– Álvaro González, Commented May 31, 2016 at 14:30
Possible duplicate of What are the differences between JSON and JavaScript object? — Álvaro González
– Álvaro González, Commented May 31, 2016 at 14:31

You · Accepted Answer · 2016-05-31 14:32:14Z

3

In JSON, object keys are type "string", and thus need to be quoted. Your keys are unquoted.

Your web browser is kind enough to allow unquoted strings.

answered May 31, 2016 at 14:32

You

542 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Lud Over a year ago

moreover, the object keys must be quoted using doublequotes

Álvaro González Over a year ago

4 up-votes so far for an answer that suggests that JavaScript/JSON syntax is a matter of browser kindness? ;-P

You Over a year ago

Alvaro: I can't tell what you're getting at. If you think the score is too low or high, vote. If you don't think my answer is very good, write a better one.

Álvaro González Over a year ago

I'll clarify: both JSON and JavaScript are languages with a clearly defined syntax and, unlike HTML, the browser mustn't attempt to fix and run code that's syntactically wrong but throw a parse error and abort.

Collectives™ on Stack Overflow

eval() works but JSON.parse() and $.parseJSON() doesn't work

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related