json parse error with double quotes

Question

A double quote even if escaped is throwing parse error.
look at the code below

//parse the json in javascript  
var testJson = \'{\"result\": [\"lunch\",         


        

Answer 1

If the standard C escapes are added, then JSON.parse will convert sequences like \" into ", \\ into \, \n into a line-feed, etc.

'foo\\bar\nbaz"' === JSON.parse('"foo\\\\bar\\nbaz\\""')

In our project's case:

original string ""{\"lat\":28.4594965,\"lng\":77.0266383}""

After passing to JSON.parse()

"{"lat":28.4594965,"lng":77.0266383}"

On 2^nd pass to JSON.parse()

{lat: 28.4594965, lng: 77.0266383}

Notice that JSON.parse() removed escaping characters instead of converting string to object.

After the escaping characters were removed, the string to object conversion worked.

Here is the demo:

while (typeof p1 != 'object') {
  p1 = JSON.parse(p1);
  pass++;
  console.log('On pass ', pass, p1);
}