JavaScript basics decision deck
Recall core JavaScript rules for declarations, equality, functions, and object references.
Declaration When should you choose const? Think binding, not object contents. Use const when the variable binding will not be reassigned. const does not freeze object properties. It says the name will keep pointing at the same value. Equality Loose comparison vs explicit conversion Comparison should not secretly parse user input. Review reply It is only a tiny helper. Why split the function? The helper calculates a value, updates the DOM, and logs analytics. Your line The issue is not size; it is mixed jobs. Let's keep the calculation separate so we can test it and let rendering own the…
Sign up free — one personalized lesson every day, matched to your role and goals.
Already have an account? Sign in