JavaScript JSON stringify() Method

Below is the example of the JSON stringify() Method.

• Example:
  
  

  
  
  

  <script>     const value = {         Company: "GeeksforGeeks",         Estd: 2009,         location: "Noida"     };     const result = JSON.stringify(value);     document.write("value of result = " + result + "<br>"); </script>

• Output:

  value of result = {"Company":"GeeksforGeeks",
                     "Estd":2009,
                     "location":"Noida"}

The JSON.stringify() method is used to create a JSON string out of it. While developing an application using JavaScript many times it is needed to serialize the data to strings for storing the data into a database or for sending the data to an API or web server. The data has to be in the form of the strings. This conversion of an object to a string can be easily done with the help of the JSON.stringify() method.

Syntax:

JSON.stringify(value, replacer, space)

Parameters: This method accepts three parameters as mentioned above and described below:

• value: It is the value which is to be converted into a JSON string.
• replacer: It is an optional parameter. This parameter value can be an altering function or an array used as a selected filter for the stringify. If the value is empty or null then all properties of an object included in a string.
• space: It is also an optional parameter. This argument is used to control spacing in the final string generated using JSON.stringify() function. It can be number or a string if it is a number than the specified number of spaces indented to the final string and if it is a string then that string is (upto 10 characters) used for indentation.

Return Value: It returns a string for a given value.

Below example illustrate the JSON signify() method in JavaScript:

• Example:

  var value = { name: "Logan", age: 21, location: "London" };
  var result = JSON.stringify(value);
  
  Output:
  {"name":"Logan", "age":21, "location":"London"}

More example codes for the above method are as follows:
Program 1: In the below code, JavaScript object is being passed as a value in the function to convert it into a string.

Output:

value of result = {"name":"Logan", "age":21, "location":"London"}
type of result = string

Program 2: In the below code, JavaScript array can be passed as a value in the function to convert it into a string.

Output:

value of result = ["Logan", 21, "Peter", 24]
type of result = string

Supported browsers:

• Chrome 4.0
• Firefox 3.5
• Opera 11.0
• Internet Explorer 8.0
• Safari 4.0