MOCKSTACKS
EN
Questions And Answers

More Tutorials




How to Convert Array to JSON in Javascript?


The JSON.stringify() method converts a JavaScript object, array, or value to a JSON string. If you so choose, you can then send that JSON string to a backend server using the Fetch API or another communication library.

const resp = await fetch('https://example.com', {
  method: 'POST',
  mode: 'cors',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify([1, 2, 3, 4, 5])
});

Because an array structure at the top-level is valid JSON, if you’re just worried about validity, then you don’t even need to do any transformations. To prepare your array so that you can make a fetch request with it, it’s as simple as using the JSON.stringify() method as we saw above.

If you want to convert back to an in-memory array, you can use JSON.parse() on the string.

const arr = JSON.parse("[1, 2, 3]")
// arr is an array
// [1, 2, 3]

If you don’t want the direct string representation of a JSON array, you might want an object where the keys are the indexes of the array.

["apple", "orange", "banana"]

// becomes

{
  "0": "apple",
  "1": "orange",
  "2": "banana"
}


Conclusion

In this page (written and validated by ) you learned about . What's Next? If you are interested in completing Javascript tutorial, we encourage you simply to start here: Javascript Tutorial.



Incorrect info or code snippet? We take very seriously the accuracy of the information provided on our website. We also make sure to test all snippets and examples provided for each section. If you find any incorrect information, please send us an email about the issue: mockstacks@gmail.com.


Share On:


Mockstacks was launched to help beginners learn programming languages; the site is optimized with no Ads as, Ads might slow down the performance. We also don't track any personal information; we also don't collect any kind of data unless the user provided us a corrected information. Almost all examples have been tested. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. By using Mockstacks.com, you agree to have read and accepted our terms of use, cookies and privacy policy.