How to Convert a Map to a JSON String in JavaScript

How to Convert a Map to a JSON String in JavaScript ?

Answer

To convert a map to a JSON string in JavaScript, you can use the `JSON.stringify` function. This function converts a JavaScript object or value to a JSON string.

✐ Examples

1 Converting a Map to a JSON String

We can convert a map to a JSON string in JavaScript using the `JSON.stringify` function. However, since `JSON.stringify` does not directly support `Map`, we need to convert the map to an object first.

For example,

We start by declaring and initializing a map named myMap with key-value pairs.
We convert the map to an object using the Object.fromEntries function.
We convert the object to a JSON string using the JSON.stringify function.
We print the resulting JSON string to the console using the console.log function.

JavaScript Program

const myMap = new Map([
    [1, 10],
    [2, 20],
    [3, 30],
    [4, 40],
    [5, 50]
]);

// Convert the map to an object
const obj = Object.fromEntries(myMap);

// Convert the object to a JSON string
const jsonString = JSON.stringify(obj);

// Print the resulting JSON string
console.log('JSON string from map:', jsonString);

Output

JSON string from map: {"1":10,"2":20,"3":30,"4":40,"5":50}

Summary

In this tutorial, we learned How to Convert a Map to a JSON String in JavaScript language with well detailed examples.

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