freeCodeCamp/guide/english/javascript/standard-objects/object/object-isfrozen/index.md

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Object isFrozen

Object isFrozen

You can use Object.isFrozen() to figure out if an object is frozen or not. It returns a true or false boolean value.

SYNTAX

Object.isFrozen(obj)

For Example:

var foods = {
    grain : "wheat",
    dairy  : "milk",
    vegetable : "carrot",
    fruit  : "grape"
};

var frozenFoods = Object.freeze(foods);

var areMyFoodsFrozen = Object.isFrozen(frozenFoods);

\\ returns true

Remember, a frozen object cannot have its properties changed.

If you try to use Object.isFrozen() on a non-object argument, it will return true.

More Information:

MDN Object.isFrozen()
MDN Object.freeze()