What issue exists in this code after the Object.freeze() call?
class SafeMap {
#store = new Map();
constructor(entries) {
if (entries) {
for (const [key, value] of entries) {
this.set(key, value);
}
}
// Make instance immutable after initialization
Object.freeze(this);
}
has(key) { return this.#store.has(key); }
get(key) { return this.#store.get(key); }
set(key, value) { this.#store.set(key, value); return this; }
delete(key) { return this.#store.delete(key); }
}
After Object.freeze() is called, the set and delete methods won't work because: 1) Object.freeze() makes the instance methods immutable, 2) However, the methods try to modify the internal #store, 3) While the private field itself remains accessible, the methods that modify it become effectively unusable, 4) get and has will continue to work as they don't modify state, 5) This creates a partially functioning object where modifications fail silently, 6) The correct pattern would be to freeze only after all mutations are complete, or omit freezing entirely, 7) This demonstrates an important consideration when combining modern class features with older object immutability techniques.