Convert JS object to JSON string

Question

If I defined an object in JS with:

var j={\"name\":\"binchen\"};

How can I convert the object to JSON? The output string should be:

Answer 1

The existing JSON replacements where too much for me, so I wrote my own function. This seems to work, but I might have missed several edge cases (that don't occur in my project). And will probably not work for any pre-existing objects, only for self-made data.

function simpleJSONstringify(obj) {
    var prop, str, val,
        isArray = obj instanceof Array;

    if (typeof obj !== "object") return false;

    str = isArray ? "[" : "{";

    function quote(str) {
        if (typeof str !== "string") str = str.toString();
        return str.match(/^\".*\"$/) ? str : '"' + str.replace(/"/g, '\\"') + '"'
    }

    for (prop in obj) {
        if (!isArray) {
            // quote property
            str += quote(prop) + ": ";
        }

        // quote value
        val = obj[prop];
        str += typeof val === "object" ? simpleJSONstringify(val) : quote(val);
        str += ", ";
    }

    // Remove last colon, close bracket
    str = str.substr(0, str.length - 2)  + ( isArray ? "]" : "}" );

    return str;
}

Answer 2

Use this,

var j={"name":"binchen"};
 var myJSON = JSON.stringify(j);

Answer 3

Simply use JSON.stringify(your_variableName) it will convert your JSON object to string and if you want to convert string to object use JSON.parse(your_variableName)

Answer 4

Just use JSON.stringify to do such conversion - however remember that fields which have undefined value will not be included into json

var j={"name":"binchen", "remember":undefined, "age": null };

var s=JSON.stringify(j);

console.log(s);

The field remember 'disappear' from output json

Answer 5

use JSON.stringify(param1, param2, param3);

What is: -

param1 --> value to convert to JSON

param2 --> function to stringify in your own way. Alternatively, it serves as a white list for which objects need to be included in the final JSON.

param3 --> A Number data type which indicates number of whitespaces to add. Max allowed are 10.

Answer 6

One custom defined for this , until we do strange from stringify method

var j={"name":"binchen","class":"awesome"};
var dq='"';
var json="{";
var last=Object.keys(j).length;
var count=0;
for(x in j)
{
json += dq+x+dq+":"+dq+j[x]+dq;
count++;
if(count<last)
   json +=",";
}
json+="}";
document.write(json);

OUTPUT

{"name":"binchen","class":"awesome"}

LIVE http://jsfiddle.net/mailmerohit5/y78zum6v/