How to convert object into string in javascript?

Question

I have a function that should take as an argument of the object and return a string

The code I wrote.

function check(obj) {
  return obj.toString();
}

Answer 1

If your object is like

const obj = { name: "John", age: 30, city: "New York" };

Use the JavaScript function JSON.stringify() to convert it into a string. Like this JSON.stringify(obj). then you will get this string:

"{"name":"John","age":30,"city":"New York"}"

Answer 2

let toString = ({name, age, language}) => `name: ${name}, age: ${age}, language: ${language}`;

const david = { name: 'David', age: 22, language: 'PHP' };

console.log(toString(david));

If you'd like to be more generic:

let toString = obj => Object.entries(obj).map(([k, v]) => `${k}: ${v}`).join(', ');

const david = { name: 'David', age: 22, language: 'PHP', favoriteFood: 'blue' };

console.log(toString(david));

Answer 3

Apply this technique if you want to convert an object to a string without applying the JSON.stringify() function

let obj = { 
  x: 1, 
  y: 'HelloWorld',
  toString: function(){
    return `${this.x}, ${this.y}`;
  }
};

let result = String(obj);

console.log(result, 'type --> ', typeof result);

Answer 4

1% of the time, you might need something besides json. Almost always you need json, but...

Sometimes you need a JavaScript string, not json. Like when you're filling in a graphql template.

It's just like the json string, but it doesn't have quotes around the attributes.

export const toJavascriptString =
  (obj: any) => JSON.stringify(obj).replace(/\"([\w_-]+?)\"\:/g, '$1:')


var obj = {a: 'wsd', b: 2}
var str = JSON.stringify(obj).replace(/\"([\w_-]+?)\"\:/g, '$1:')
console.log(str)

{a:"wsd",b:2}

Answer 5

function check(obj) {
  console.log(typeof obj) // object
  let res = JSON.stringify(obj)
  console.log(typeof res) // string
  return res;
}
let example = {name: "John"}
console.log(check(example)) // {"name":"John"}

Answer 6

var data = {name: "john", age: 30}
var str = JSON.stringify(data)  // "{\"name\":\"john\",\"age\":30}"
var btoas = btoa(str)  // "eyJuYW1lIjoiam9obiIsImFnZSI6MzB9"
var atobs = atob(btoas)  // "{\"name\":\"john\",\"age\":30}"
var myRealData = JSON.parse(atobs)  //{name: "john", age: 30}

` BOYAA !! `