Intro

What is a Constructor Function?

The concept

The code

Another example

Summary

Outro

Intro

What is a constructor function?

Passing in Variables

Using the this keyword

Calling the Constructor Function

Testing the constructor function

Conclusion

Introduction

The Problem: Manual Object Creation

Defining a Constructor Function

Using the new Keyword

Adding Behavior to Objects

Multiple Instances & Scalability

Best Practices

Key Takeaways

What is the purpose of the constructor function?

What does the constructor function do to the code?

What is the new keyword in JavaScript?

How to write a constructor function?

Syntax for a constructor function

What is a literal object?

How to define a function in JavaScript?

How to return an object from a constructor function?

How to convert a literal object to a constructor function?

Conclusion

Intro

Basic way of creating an object

Creating a constructor function

How to identify a constructor

New keyword in JavaScript

Assign values to the constructor

Default return value

Testing the constructor function

Adding a method to an object

Conclusion

Using the date object new Date()

Using methods from the date object

Setting up an object for a student

Setting up a constructor function

Return value of undefined from a function

Using the keyword new

What does the keyword new do

Setting up properties with the this keyword

Viewing the new object

Class conversion in VS code

Adding additional objects

Changing up properties

Adding in a fullName method

Adding in an getMyGrade method

Setting up another example

Javascript Constructor Function

Constructor Function

New Operator To Create an Object from a Constructor Function

Create Multiple Objects

Constructor Function Parameters

Add Parameters in this Constructor Function

Intro

Recap: What is a Factory and what is a Constructor?

Differences: Factory Function

Differences: Constructor Function

Why you should use Factories

Classes

Conclusion

What Is a Constructor

Constructor

Why Is It Called a Constructor

Create an Object

Assign a Name

Constructors

Building Up a Constructor

A Constructor

Syntax

What Is the Difference between the Factory Function and Constructor Function

Factory Functions

Constructor Function

New Keyword

Difference between the Factory Functions and Constructor Function

The prototype model

Why do we need to know about the prototype model?

What is a constructor?

Defining a constructor function

How to create a constructor function

Creating a new object with a constructor

Passing parameters into a constructor

Adding a method to the constructor

Adding a console log

Attaching methods to an emulated class

JavaScript Object Constructors

Constructor Functions Basics

The 'new' Operator

Prototype Properties

Object Initialization Patterns

Factory Functions

Constructor Patterns

Inheritance Basics

Inheritance Patterns

Best Practices and Summary

Outro

Simple Example a Constructor with no Arguments

Constructor That Accepts Arguments

Handle Default Values

Intro

What we have learned in the last video?

What we are going to learn in today's video?

Use of JavaScript Class

Class and Methods

Using Objects

Use of this keyword

JavaScript Constructor

Accessing properties of the Object

Idea of ServiceNow Classes

Thanks for watching !!

The prototype property

Testing the prototype

Modifying a prototype

How is a method being invoked?

How jQuery uses the prototype object

Modifying prototype objects

Prototype Chains

Modifying prototype chain

Symbol name collisions in Javascript

Conclusion

Introduction

Adding Parameters to the Constructor

Introduction – different ways of creating functions in JavaScript

Using the function keyword to define a named function

Running a simple function in JSFiddle

Creating anonymous (nameless) functions

Using anonymous functions with jQuery’s .each()

Creating functions with the Function constructor

Objects created with constructors (Object, Date, Function)

Function constructor creates nameless functions

Assigning nameless functions to variables (named afterward)

Function expressions – assigning anonymous functions to variables

Function constructor with a body passed as a string

Function constructor with parameters and body (a+b example)

Correct way to define parameters as strings in constructor

Running a function that adds numbers (2 + 5 example)

Why most people prefer function keyword over new Function

Creating plain objects with new Object()

Functions are also objects in JavaScript

Creating custom constructors with properties (msg, cats)

Initializing objects from a custom constructor

Adding methods inside constructors with this keyword

Running a method on a custom constructor object (msg + cats)

Functions as objects and constructors in JavaScript

Built-in constructors (Object, Function, Array, Date)

Creating and extending your own constructors in JavaScript

Summary and conclusion

Object Constructor

Object Constructor Function

Create the Object Constructor

Built-in Javascript Constructors