JSON.parse() a wrong string [duplicate]

Question

I have a string that I obtain via a user, so it is not guaranteed to be a correct JSON string format.

This problem may cause the rest of the js code to be stop.

Consider the following example:

var a='==wrong string===';
var b=JSON.parse(a);
alert(1); //will not implemented

How to avoid this problem?

@Sirko is right, and then you can right a help function that will return null if the JSON input is not valid.. — ngeksyo
– ngeksyo, Commented Jul 4, 2017 at 11:55

Shubham · Accepted Answer · 2017-07-04 12:01:34Z

1

You can use try catch block:

var a='==wrong string===';
try{
  var b=JSON.parse(a);
 }catch(e){
  console.log(e.message); /*use e.message to get the exact error */
 }
alert(1)

Shubham

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answered Jul 4, 2017 at 11:55

Carlos Franco

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