How to Convert an Object Into a JSON String in TypeScript

1. Use the JSON.stringify() Method to Convert an Object Into a JSON String in TypeScript
2. Use JSON.stringify() and JSON.parse() to Convert an Object Into a JSON String in TypeScript

This tutorial will introduce converting a TypeScript object to a JSON string.

Use the JSON.stringify() Method to Convert an Object Into a JSON String in TypeScript

In TypeScript, we will use the JSON.stringify() method to turn any object into a JSON string.

Below are some code examples to better understand how these methods work. Let’s consider the person object, which contains the person’s first and last name.

let person = {
    firstName:"Ibrahim",
    lastName:"Alvi"
};
console.log(person)

let jsonData = JSON.stringify(person);

console.log(`The person object is : ${person} and it's JSON string is: ${jsonData}`);

Output:

Use JSON.stringify() and JSON.parse() to Convert an Object Into a JSON String in TypeScript

Suppose we want to parse it back into the previous object. We use the JSON.parse() method to parse a JSON string to construct a TypeScript object described by the string.

The code below shows how object data can be saved to the local browser storage by turning it into a JSON string and how it can be retrieved and parsed.

We will use the JSON.stringify() and JSON.parse() methods.

// Storing data:
const dataObj = {
    name: "Ibrahim",
    age: 31,
    city: "Karachi"
};
const myJSON = JSON.stringify(dataObj);
localStorage.setItem("testJSON", myJSON);

// Retrieving data:
let text = localStorage.getItem("testJSON");
let obj = JSON.parse(text);
document.getElementById("dataid").innerHTML = obj.name;

Output: