Podcast
Questions and Answers
Which construct does JavaScript use for inheritance?
Which construct does JavaScript use for inheritance?
What is the purpose of the prototype object in JavaScript?
What is the purpose of the prototype object in JavaScript?
Can the prototype of an object be changed at runtime in JavaScript?
Can the prototype of an object be changed at runtime in JavaScript?
What happens when accessing a property of an object in JavaScript?
What happens when accessing a property of an object in JavaScript?
Signup and view all the answers
Which concept does not exist in JavaScript due to the ability to mutate the prototype chain?
Which concept does not exist in JavaScript due to the ability to mutate the prototype chain?
Signup and view all the answers
Study Notes
Inheritance in JavaScript
- JavaScript uses prototypal inheritance for inheritance, which is a mechanism that allows objects to inherit properties and behavior from other objects.
The Prototype Object
- The prototype object is the mechanism that enables inheritance in JavaScript, allowing objects to inherit properties and behavior from other objects.
- The prototype object is used to adding new properties or methods to an object's inheritance chain.
Changing Prototype at Runtime
- Yes, the prototype of an object can be changed at runtime in JavaScript, which allows for dynamic modification of an object's inheritance chain.
Accessing Properties
- When accessing a property of an object in JavaScript, the JavaScript engine will first search the object itself, then the prototype, and so on up the prototype chain until it finds the property or reaches the end of the chain.
Private Variables
- The concept of private variables does not exist in JavaScript due to the ability to mutate the prototype chain, which allows for modification of an object's properties and behavior at runtime.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
Description
Test your knowledge on JavaScript inheritance and prototypes with this quiz. Learn about the prototype chain, mutating objects, and the role of null in inheritance.
