How can I get the keys of a JavaScript object as an array, either using jQuery or pure JavaScript?

General Discussions
#1

How can I get the keys of a JavaScript object as an array, either using jQuery or pure JavaScript?

Is there a less verbose way to do this than the following method?

var foo = { 'alpha': 'puffin', 'beta': 'beagle' };
var keys = [];
for (var key in foo) {
keys.push(key);
}

I am looking for a way to JavaScript get object keys more succinctly.

#2

You can use the Object.keys() method in pure JavaScript to retrieve the keys of an object as an array. This method is concise and eliminates the need for a loop.

Here’s how to do it:

var foo = { 'alpha': 'puffin', 'beta': 'beagle' };
var keys = Object.keys(foo); // Using Object.keys to get the keys

This is a straightforward way to JavaScript get object keys without additional verbosity.

#3

If you want to use jQuery, you can still utilize Object.keys() since jQuery does not have a built-in method for this specific task. Here’s how to do it within a jQuery context:

var foo = { 'alpha': 'puffin', 'beta': 'beagle' };
var keys = Object.keys(foo); // Using Object.keys even in a jQuery context

This method effectively demonstrates how to JavaScript get object keys in a jQuery-friendly manner.

#4

Another option is to use Array.from() along with Object.keys(), which can be useful if you want to directly manipulate the array of keys or convert it to a different format:

var foo = { 'alpha': 'puffin', 'beta': 'beagle' };
var keys = Array.from(Object.keys(foo)); // Using Array.from with Object.keys

This approach is also a succinct way to JavaScript get object keys and can be particularly useful if you plan to chain additional array methods.