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Isabelle Viktoria Maciohsek
2021-06-13 19:52:48 +03:00
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blog_posts/javascript-deep-freeze-object.md
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@ -5,6 +5,8 @@ tags: javascript,object
authors: chalarangelo
cover: blog_images/frozen-globe.jpg
excerpt: Learn how mutability works in JavaScript, its applications to objects and how you can properly freeze them to make them constant.
firstSeen: 2020-03-17T16:15:30+02:00
lastUpdated: 2021-06-12T19:30:41+03:00
---
Objects in JavaScript are mutable, regardless if you define them as `const` variables or not. In fact, using `const` when defining an object only prevents the variable from being reassigned. However, you can reassign the properties of a `const` object or array, like this: