Protect a JavaScript Object from Changes with Object.freeze()

In this lesson we’ll learn how to prevent changes to an object in JavaScript using the built in Object.freeze() method. Once an object has been passed to Object.freeze(), no properties can be added, removed, or changed.

This is helpful in a variety of situations, particularly with preventing inadvertent changes to an object’s data throughout a codebase.

• ← Limit Changes to a JavaScript object with Object.seal()
• Create a Copy of an Object in JavaScript →