Object.isFrozen()
ES5+Determines if an object is frozen.
Syntax
Object.isFrozen(obj)Parameters
obj Object The object to check
Return Value
boolean
true if the object is frozen, otherwise false
Examples
JavaScript
const obj = { a: 1 };
console.log(Object.isFrozen(obj));
Object.freeze(obj);
console.log(Object.isFrozen(obj));Output:
// false
true