Syntax error from JSON.parse()

Question

My custom method to get json from string:

function GetJSON(a) {
        if (typeof a !== "string" || !a || a == null) return null;
        a = a.replace(/\r\n|\r|\n|\t/g, '').replace(/\\/g, '/');
        return new Function("return " + a)();
    }

    var notes ='{editable:true,useAjax:false,notes:[{"top":76,"left":411,"width":30,"height":30,"text":"hill","editable":true},{"top":183,"left":556,"width":30,"height":30,"text":"lake","editable":true}]}';

    return GetJSON(notes); //<-- works fine

    //I am trying to replace my custom method with
      return JSON.parse(notes);

But I get syntax error when I call JSON.parse()

What can be wrong?

EDIT: I pasted the actual value that I pass to JSON.parse() from debug output.

For future reference ("what can be wrong" when you receive a syntax error), syntax error means that your input is syntactically invalid, I.E. it is not following the grammar rules of the language. — Esailija
– Esailija, Commented Apr 5, 2012 at 17:33

gen_Eric · Accepted Answer · 2012-04-05 17:28:23Z

4

notes = "{editable:true,useAjax:false,notes:[" + notes + "]}";

You forgot to quote your keys here. It should be:

notes = '{"editable":true,"useAjax":false,"notes":[' + notes + ']}';

The final JSON should be:

var notes ='{"editable":true,"useAjax":false,"notes":[{"top":76,"left":411,...'

answered Apr 5, 2012 at 17:28

gen_Eric

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2 Comments

kheya Over a year ago

This was the issue!! Silly me.

gen_Eric Over a year ago

Yeah, JSON.parse is really strict about syntax :-P

Marc B · Accepted Answer · 2012-04-05 17:21:55Z

2

Your notes portion is missing a , between the two {} sets, making it invalid JSON.

It should be

[..snip..] "editable":true}, ' + '{"top":20,"left"[...snip...]
                           ^^--- missing

answered Apr 5, 2012 at 17:21

Marc B

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1 Comment

gen_Eric Over a year ago

There seems to be a comma in the code in the question (maybe it was edited?).

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