how to convert json values in comma separated string using javascript

Answer 1

You could add brackets to the string, parse the string (JSON.parse) and map (Array#map) the property and the join (Array#join) the result.

var string = '{"name":"Marine Lines","location_id":3},{"name":"Ghatkopar","location_id":2}',
    array = JSON.parse('[' + string + ']'),
    result = array.map(function (a) { return a.location_id; }).join();

console.log(result);