How to Convert Javascript Array to JSON

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Storing text data into the database is one of the best legal practices in the web development world. JSON makes it possible to store JavaScript objects as text. Storing and fetching the JSON data is very easy. The data has to be in the form of strings. Let’s see how to convert the array to json string.

Javascript Array to JSON

To convert an array to json in JavaScript, use the JSON.stringify() method. The JSON.stringify() method converts a JavaScript object into a string. You can take an Object as an Array because everything in JavaScript is an Object.

To serialize the data to strings to store the data into a database or sending the data to the webserver, use the JSON.stringify() method. Arrays in JSON are almost the same as arrays in JavaScript.

Let’s see the syntax of JSON.stringify() method.

Syntax

JSON.stringify(obj, replacer, space)

Arguments

The obj is a required parameter which is the value to convert a string.

The replacer is an optional argument with either a function or an array used to transform the result.

The space is an optional parameter which is either a String or a Number.

Return value

The stringify() method returns a JSON string.

Implementation of JSON.stringify()

Define an array and then convert it into json string.

let moneyheist = ["Tokyo", "Nairobi", "Berlin", "Oslo", "Moscow"]

let moneyheist_json = JSON.stringify(moneyheist)

console.log("After converting into JSON string")
console.log(moneyheist_json)

console.log("Check its data type using typeof()")
console.log(typeof(moneyheist_json))

Output

After converting into JSON string
["Tokyo","Nairobi","Berlin","Oslo","Moscow"]

Check its data type using typeof()
string

To check the data type of a variable in JavaScript, use the typeof() function.

The moneyheist_json variable is now a string, and it is ready to send to the server.

That’s it for this tutorial.

See also

JavaScript Object to String

JavaScript Array to String

JavaScript String to Boolean

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