×

Save Your Code

If you click the save button, your code will be saved, and you get an URL you can share with others.

By clicking the "Save" button you agree to our terms and conditions.

Report Error

×

Save to Google Drive

If you have a Google account, you can save this code to your Google Drive.

Google will ask you to confirm Google Drive access.

×

Open from Google Drive

If you have saved a file to Google Drive, you can open it here:

Result Size: 625 x 571
×
Change Orientation Save Code Save to Google DriveSave to Google Drive Load from Google DriveLoad from Google Drive Change Theme, Dark/Light
​x
 
<!DOCTYPE html>
<html>
<body>
​
<h2>JavaScript Object.keys()</h2>
​
<p>This example list the enumerable properties of an object.</p>
​
<p id="demo"></p>
​
<script>
// Create an object:
var person = {
  firstName: "John",
  lastName : "Doe",
  language : "EN"
}
// Change Property
Object.defineProperty(person, "language", {enumerable:false});
// Display Properties
document.getElementById("demo").innerHTML = Object.keys(person);
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/js/tryit.asp?filename=tryjs_object_es5_4 by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 13:23:24 GMT -->
</html>
​
×

Report a Problem: