In a WeakMap, keys must be ________ and not primitive values.
- Objects
- Strings
- Numbers
- Booleans
In a WeakMap, keys must be objects, as primitive values are not allowed as keys. This is because WeakMap uses "weak" references to the keys, and primitive values do not have references like objects.
Loading...
Related Quiz
- Can a Set contain elements of mixed data types in JavaScript?
- What are the first and second arguments of a tag function in a tagged template literal?
- How does tree shaking affect the handling of side effects in JavaScript modules?
- The spread operator can be used in ES6 to clone an array without ________ the original array.
- In a class hierarchy, if a method is overridden, how can you call the method from the parent class?