The Object isFrozen() method
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Find out all about the JavaScript isFrozen() method of the Object object
Accepts an object as argument, and returns true
if the object is frozen, false
otherwise. Objects are frozen when they are return values of the Object.freeze()
function.
Example:
const dog = {}
dog.breed = 'Siberian Husky'
const myDog = Object.freeze(dog)
Object.isFrozen(dog) //true
Object.isFrozen(myDog) //true
dog === myDog //true
In the example, both dog
and myDog
are frozen. The argument passed as argument to Object.freeze()
is mutated, and can’t be un-freezed. It’s also returned as argument, hence dog
=== myDog
(it’s the same exact object).
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