JS Coding Questions

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What are the different ways to make an object non-extensible

You can mark an object non-extensible in 3 ways,

1. Object.preventExtensions

2. Object.seal

3. Object.freeze

javascript

1var newObject = {};
2
3Object.preventExtensions(newObject); // Prevent objects are non-extensible
4
5Object.isExtensible(newObject); // false
6
7var sealedObject = Object.seal({}); // Sealed objects are non-extensible
8
9Object.isExtensible(sealedObject); // false
10
11var frozenObject = Object.freeze({}); // Frozen objects are non-extensible
12
13Object.isExtensible(frozenObject); // false

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