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Getting Started
How This Course Will Help You
What Does This Course Cover?
JavaScript Gotchas
Be Careful Where You Break Lines
Use === Instead of ==
Declare Before Use
Stay One Step Ahead
Lint the Code
Quiz on JavaScript Gotchas
Exercise 1: Let's Vote
Solution Review: Let's Vote
Exercise 2: Fix the Code
Solution Review: Fix the Code
Exercise 3: Lint the Code
Solution Review: Lint the Code
Variables and Constants
Out with var
In with let
Perils of Mutability
const
Safer Code With let and const
Quiz on Variables and Constants
Exercise 1: Let's Get the Output
Solution Review: Let's Get the Output
Working With Function Arguments
The Power and Perils of arguments
Using the Rest Parameter
The Spread Operator
Uses of the Spread Operator
Defining Default Values for Parameters
Multiple Default Parameters
Expressions as Default Values
Quiz on Function Arguments
Exercise 1: Calculate the Tax
Solution Review: Calculate the Tax
Exercise 2: Purchase Items
Solution Review: Purchase Items
Exercise 3: Place Order
Solution Review: Place Order
Iterators and Symbols
The Convenience of Enhanced for
Symbol—A New Primitive Type
Global Registry With Symbol
Special Well-Known Symbols
Using Custom Iterators
Implementing an Iterator
Removing Noise With Yield
Removing Noise With Generators
Combining Generators
Creating Infinite Iterators
Quiz on Iterators and Symbols
Exercise 1: Fibonacci Series
Solution Review: Fibonacci Series
Exercise 2: Fibonacci Series Index
Solution Review: Fibonacci Series Index
Arrow Functions and Functional Style
From Anonymous to Arrow Functions
Multiline Arrow Functions
Using the Rest Parameter and Default Arguments
Anonymous vs. Arrow Functions
Lexically Scoped this and arguments
Limitations of Arrow Functions: Anonymous and Not a Constructor
Limitations: No Prototype and new.target Property
Limitations: Generators, Exceptions, and Object Literals
When to Use Arrow Functions
Arrow Functions and Functional Style
Quiz on Arrow Functions and Functional Style
Exercise 1: Refactor the Code
Solution Review: Refactor the Code
Exercise 2: Functional Style Programming
Solution Review: Functional Style Programming
Literals and Destructuring
Using Template Literals
Multiline Strings
Tagged Template
Enhanced Object Literals
Array Destructuring: Extracting and Ignoring Values
Array Destructuring: Default and Parameters Values
Object Destructuring: Extracting Object Properties
Object Destructuring: Default and Parameter Values
Object Destructuring: Deep Destructuring, and Collisions
Object Destructuring: The Role of the Spread Operator
Quiz on Literals and Destructuring
Exercise 1: Tagged Template
Solution Review: Tagged Template
Exercise 2: Destructuring
Solution Review: Destructuring
Working with Classes
Creating a Class
Implementing a Constructor
Defining a Method
Defining Computed Members
Creating Properties
Defining Class Members
Class Expressions
New Built-in Classes: Set
New Built-in Classes: Map
New Built-in Classes: WeakSet and WeakMap
Quiz on Working with Classes
Exercise 1: Class Implementation
Solution Review: Class Implementation
Exercise 2: Maps
Solution Review: Maps
Using Inheritance
Understanding Prototypal Inheritance
Inheriting from a Class: Subclass and Overridden Methods
Inheriting from a Class: extends keyword and Prototype Chaining
Inheriting from a Class: Default Constructors and Legacy Classes
Managing Instance Types
Managing Instance Types Rules
Managing Instance Types with species
Quiz on Using Inheritance
Exercise 1: Sets
Solution Review: Sets
Exercise 2: Instance Type
Solution Review: Instance Type
Using Modules
Introduction
Creating a Module
Exporting from a Module
Default Exports
Reexporting from Another Module
Importing from a Module
Quiz on Using Modules
Keeping Your Promises
Introduction
No Thanks to Callback Hell
Promises to the Rescue
Ways to Create a Promise
Chaining Promises
Working with Multiple Promises: Racing Promises
Working with Multiple Promises: Gathering All Promises
Async and Await
Quiz on Keeping Your Promises
Exercise 1: Gathering All Promises
Solution Review: Gathering All Promises
Exercise 2: Async and Await
Solution Review: Async and Await
Exploring Metaprogramming
Introduction
The Power and Perils of Metaprogramming
Dynamic Access
Member Injection: Instance
Member Injection: Class's Prototype and Property
Member Injection: Injecting Multiple Properties
Quiz on Exploring Metaprogramming
Exercise 1: Injecting a Method
Solution Review: Injecting a Method
Exercise 2: Injecting Multiple Properties
Solution Review: Injecting Multiple Properties
Deep Dive into Metaprogramming
Introduction
Purpose of Reflect: Invoke Functions and Access Prototypes
Purpose of Reflect: Exploring Properties
Metaprogramming with Proxy
Using Traps
Leasing an Object Using a Revocable Proxy
Intercepting Function Calls Using Proxy
Synthesizing Members with Proxy
Synthesizing Members Directly on an Instance
Using Decorators
Introspecting the Decorated Class
Creating a Custom Decorator
Quiz on Deep Dive into Metaprogramming
Exercise 1: Revocable Proxy
Solution Review: Revocable Proxy
Exercise 2: Proxy
Solution Review: Proxy
Conclusion
Wrap Up!
Appendix
How to Run Modern JavaScript
Home
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Rediscovering JavaScript: ES6, ES7 & ES8
Exercise 2: Maps
Test your understanding of Maps in this challenge.
We'll cover the following...
Problem statement
Sample input calls and outputs
Exercise
Problem statement
In this exercise,
...