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JavaScript - get object properties sorted by key

3 points
Created by:
Violetd
415

In this article, we would like to show you how to get object properties sorted by key in JavaScript.

The main concept of this solution is to use:

  • keys() method which returns an array of given object property names,
  • sort() method to sort the array,
  • reduce() method to create a new object from the array with sorted properties.

Runnable example:

// ONLINE-RUNNER:browser;

const object = {
  'b': 'bb',
  'c': 'cc',
  'a': 'aa'
};

const sortedObject = Object.keys(object)
  .sort()
  .reduce((result, key) => (result[key] = object[key], result),{});

console.log(JSON.stringify(object));       // {"b":"bb", "c":"cc", "a":"aa"}
console.log(JSON.stringify(sortedObject)); // {"a":"aa", "b":"bb", "c":"cc"}

Note:

The default sort order is ascending but elements converted into strings are compared by their sequences of UTF-16 code units values.

References

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