What is super()?

Short answer: super() calls the parent class constructor. Must be called before using this in subclass. Example: class Animal {

Example code

constructor(name) { this.name = name; }
}
class Dog extends Animal { constructor(name, breed) { super(name); this.breed = breed;
}
}

Real-world example (ShopNest)

ShopNest’s browser cart uses modern JavaScript: fetch APIs with async/await, modules, and clear error handling.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.