parse json string with forward slashes - javascript

Question

Looks pretty simple but I am unable to figure it out

var str="[{name:\"House\",id:\"1\"},{name:\"House and Land\",id:\"5\"},{name:\"Land\",id:\"6\"},{name:\"Terrace\",id:\"11\"}]";
JSON.parse(str.replace(/\s/g, "").replace(/\//g, ''));

I am unable to the convert above string(which comes from 3rd party website) to valid json so that I can iterate it on my side

error

VM5304:1 Uncaught SyntaxError: Unexpected token n in JSON at position 2
    at JSON.parse (<anonymous>)

Are you sure the source string is not valid? It looks like the result of a JSON encoded value being included in another JSON encoded value. — Marty
– Marty, Commented Nov 23, 2017 at 23:19
That's not a valid JSON, but it's ok for console.log( eval( str ) ) — Slai
– Slai, Commented Nov 23, 2017 at 23:26
I'm with @Marty - this appears very familiar to valid JSON that is being displayed in debugging tools. Are you in actual possession of a string with slashes (i.e. you use it like var string = ... exactly as you have posted?), or is it being returned from some sort of ajax/api call and the slashes appear in your developer tools? — Adam Jenkins
– Adam Jenkins, Commented Nov 23, 2017 at 23:27
Ok, I've got it - somebody has JSON.stringify-ied an already valid JSON string (which adds the forward slashes) and now you are trying to parse it - that's what is really going on here. — Adam Jenkins
– Adam Jenkins, Commented Nov 23, 2017 at 23:31

Jay Harris · Accepted Answer · 2017-11-23 23:35:41Z

2

JSON requires the keys to be quoted. It appears that your keys are coming in unquoted. So add another .replace statement to insert the quote back in:

.replace(/(\w+):/g, '"$1":');

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON

Property names must be double-quoted strings; trailing commas are forbidden.

COMPLETE SOLUTION:

.replace(/(,|{)\s*(\w+)\s*:/g, '$1"$2":');

edited Nov 23, 2017 at 23:35

answered Nov 23, 2017 at 23:21

Jay Harris

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