how_do_you_prevent_an_object_to_extend.md

How do you prevent an object to extend

How do you prevent an object to extend?

You can prevent an object from being extended (i.e., from adding new properties) using the Object.preventExtensions() method. This method makes the object non-extensible.

Example:

const obj = { name: 'John' };
Object.preventExtensions(obj);
obj.age = 30; // Won't be added
console.log(obj); // { name: 'John' }

Tags: basic, JavaScript, objects

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