Show Output
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>JavaScript Cannot Assign to Read-only Property of Object in Strict Mode</title> </head> <body> <script> "use strict"; let person = {name: "Peter", age: 28}; Object.defineProperty(person, "gender", {value: "male", writable: false}); person.gender = "female"; // TypeError </script> <p><strong>Note:</strong> Please check out the browser console by pressing the f12 key on the keyboard.</p> </body> </html>
