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Index
Preface
Who this book is for What this book covers To get the most out of this book Get in touch
Getting Started with JavaScript
Why should you learn JavaScript? Setting up your environment
Integrated Development Environment Web browser Extra tools Online editor
How does the browser understand JavaScript? Using the browser console
Practice exercise 1.1
Adding JavaScript to a web page
Directly in HTML
Practice exercise 1.2
Linking an external file to our web page
Practice exercise 1.3
Writing JavaScript code
Formatting code
Indentations and whitespace Semicolons
Code comments
Practice exercise 1.4
Prompt Random numbers
Chapter project
Creating an HTML file and a linked JavaScript file
Self-check quiz Summary
JavaScript Essentials
Variables
Declaring variables
let, var, and const Naming variables
Primitive data types
String
Escape characters
Number BigInt Boolean Symbol Undefined null
Analyzing and modifying data types
Working out the type of a variable Converting data types Practice exercise 2.1
Operators
Arithmetic operators
Addition Subtraction Multiplication Division Exponentiation Modulus Unary operators: increment and decrement Combining the operators Practice exercise 2.3
Assignment operators
Practice exercise 2.4
Comparison operators
Equal Not equal Greater than and smaller than
Logical operators
And Or Not
Chapter project
Miles-to-kilometers converter BMI calculator
Self-check quiz Summary
JavaScript Multiple Values
Arrays and their properties
Creating arrays Accessing elements Overwriting elements Built-in length property Practice exercise 3.1
Array methods
Adding and replacing elements Deleting elements Finding elements Sorting Reversing Practice exercise 3.2
Multidimensional arrays
Practice exercise 3.3
Objects in JavaScript
Updating objects Practice exercise 3.4
Working with objects and arrays
Objects in objects Arrays in objects Objects in arrays Objects in arrays in objects Practice exercise 3.5
Chapter projects
Manipulating an array Company product catalog
Self-check quiz Summary
Logic Statements
if and if else statements
Practice exercise 4.1
else if statements
Practice exercise 4.2
Conditional ternary operators
Practice exercise 4.3
switch statements
The default case
Practice exercise 4.4
Combining cases
Practice exercise 4.5
Chapter projects
Evaluating a number game Friend checker game Rock Paper Scissors game
Self-check quiz Summary
Loops
while loops
Practice exercise 5.1
do while loops
Practice exercise 5.2
for loops
Practice exercise 5.3
Nested loops
Practice exercise 5.4
Loops and arrays
Practice exercise 5.5 for of loop
Practice exercise 5.6
Loops and objects
for in loop
Practice exercise 5.7
Looping over objects by converting to an array
break and continue
break continue Practice exercise 5.8 break, continue, and nested loops break and continue and labeled blocks
Chapter project
Math multiplication table
Self-check quiz Summary
Functions
Basic functions
Invoking functions Writing functions Naming functions Practice exercise 6.1 Practice exercise 6.2
Parameters and arguments
Practice exercise 6.3 Default or unsuitable parameters
Special functions and operators
Arrow functions Spread operator Rest parameter
Returning function values
Practice exercise 6.4 Returning with arrow functions
Variable scope in functions
Local variables in functions
let versus var variables const scope
Global variables Immediately invoked function expression
Practice exercise 6.5
Recursive functions
Practice exercise 6.6
Nested functions
Practice exercise 6.7
Anonymous functions
Practice exercise 6.8 Function callbacks
Chapter projects
Create a recursive function Set timeout order
Self-check quiz Summary
Classes
Object-oriented programming Classes and objects Classes
Constructors
Practice exercise 7.1
Methods
Practice exercise 7.2
Properties
Getters and setters
Inheritance Prototypes
Practice exercise 7.3
Chapter projects
Employee tracking app Menu items price calculator
Self-check quiz Summary
Built-In JavaScript Methods
Introduction to built-in JavaScript methods Global methods
Decoding and encoding URIs
decodeUri() and encodeUri() decodeUriComponent() and encodeUriComponent() Encoding with escape() and unescape() Practice exercise 8.1
Parsing numbers
Making integers with parseInt() Making floats with parseFloat()
Executing JavaScript with eval()
Array methods
Performing a certain action for every item Filtering an array Checking a condition for all elements Replacing part of an array with another part of the array Mapping the values of an array Finding the last occurrence in an array Practice exercise 8.2 Practice exercise 8.3
String methods
Combining strings Converting a string to an array Converting an array to a string Working with index and positions Creating substrings Replacing parts of the string Uppercase and lowercase The start and end of a string Practice exercise 8.4 Practice exercise 8.5
Number methods
Checking if something is (not) a number Checking if something is finite Checking if something is an integer Specifying a number of decimals Specifying precision
Math methods
Finding the highest and lowest number Square root and raising to the power of Turning decimals into integers Exponent and logarithm Practice exercise 8.6
Date methods
Creating dates Methods to get and set the elements of a date Parsing dates Converting a date to a string Practice exercise 8.7
Chapter projects
Word scrambler Countdown timer
Self-check quiz Summary
The Document Object Model
HTML crash course
HTML elements HTML attributes
The BOM
Practice exercise 9.1 Window history object Window navigator object Window location object
Practice exercise 9.2
The DOM
Additional DOM properties Selecting page elements Practice exercise 9.3
Chapter project
Manipulating HTML elements with JavaScript
Self-check quiz Summary
Dynamic Element Manipulation Using the DOM
Basic DOM traversing
Practice exercise 10.1 Selecting elements as objects
Changing innerText Changing innerHTML
Accessing elements in the DOM
Accessing elements by ID
Practice exercise 10.2
Accessing elements by tag name
Practice exercise 10.3
Accessing elements by class name
Practice exercise 10.4
Accessing elements with a CSS selector
Using querySelector() Using querySelectorAll()
Element click handler This and the DOM
Practice exercise 10.7
Manipulating element style Changing the classes of an element
Adding classes to elements Removing classes from elements Toggling classes
Manipulating attributes
Practice exercise 10.8
Event listeners on elements
Practice exercise 10.9
Creating new elements
Practice exercise 10.10
Chapter projects
Collapsible accordion component Interactive voting system Hangman game
Self-check quiz Summary
Interactive Content and Event Listeners
Introducing interactive content Specifying events
Specifying events with HTML Specifying events with JavaScript
Practice exercise 11.1
Specifying events with event listeners
Practice exercise 11.2
The onload event handler
Practice exercise 11.3
Mouse event handlers
Practice exercise 11.4
The event target property
Practice exercise 11.5
DOM event flow
Practice exercise 11.6
onchange and onblur
Practice exercise 11.7
Key event handler
Practice exercise 11.8
Drag and drop elements
Practice exercise 11.9
Form submission
Practice exercise 11.10
Animating elements
Practice exercise 11.11
Chapter projects
Build your own analytics Star rating system Mouse position tracker Box clicker speed test game
Self-check quiz Summary
Intermediate JavaScript
Regular expressions
Specifying multiple options for words Character options Groups Practical regex
Searching and replacing strings Email validation
Functions and the arguments object
Practice exercise 12.3
JavaScript hoisting Using strict mode Debugging
Breakpoints
Practice exercise 12.4
Error handling
Practice exercise 12.5
Using cookies
Practice exercise 12.6
Local storage
Practice exercise 12.7
JSON
Practice exercise 12.8 Parsing JSON
Practice exercise 12.9 Practice exercise 12.9 answers
Chapter projects
Email extractor Form validator Simple math quiz
Self-check quiz Summary
Concurrency
Introducing concurrency Callbacks
Practice exercise 13.1
Promises
Practice exercise 13.2
async and await
Practice exercise 13.3
Event loop
Call stack and callback queue
Chapter project
Password checker
Self-check quiz Summary
HTML5, Canvas, and JavaScript
Introducing HTML5 with JavaScript Local file reader
Uploading files Reading files Practice exercise 14.1
Getting position data with GeoLocation HTML5 canvas
Practice exercise 14.2
Dynamic canvas
Adding lines and circles to the canvas
Practice exercise 14.3
Adding text to the canvas
Practice exercise 14.4
Adding and uploading images to the canvas
Practice exercise 14.5
Adding animations to the canvas
Practice exercise 14.6
Drawing on canvas with a mouse
Practice exercise 14.7
Saving dynamic images Media on the page Digital accessibility in HTML Chapter projects
Create a Matrix effect Countdown clock Online paint app
Self-check quiz Summary
Next Steps
Libraries and frameworks
Libraries
jQuery D3 Underscore React
Frameworks
Vue.js Angular
Learning the backend
APIs AJAX
Practice exercise 15.1
Node.js
Using the Express Node.js framework
Next steps Chapter projects
Working with JSON List-making project
Self-check quiz Summary
Appendix – Practice Exercise, Project, and Self-Check Quiz Answers
Chapter 1, Getting Started with JavaScript
Practice exercises Projects
Creating an HTML file and a linked JavaScript file
Self-check quiz
Chapter 2, JavaScript Essentials
Practice exercises Projects
Miles-to-kilometers converter BMI calculator
Self-check quiz
Chapter 3, JavaScript Multiple Values
Practice exercises Projects
Manipulating an array Company product catalog
Self-check quiz
Chapter 4, Logic Statements
Practice exercises Projects
Evaluating a number game answers Friend checker game answers Rock paper scissors game answers
Self-check quiz
Chapter 5, Loops
Practice exercises Project
Math multiplication table
Self-check quiz
Chapter 6, Functions
Practice exercises Projects
Create a recursive function Set timeout order
Self-check quiz
Chapter 7, Classes
Practice exercises Projects
Employee tracking app Menu items price calculator
Self-check quiz
Chapter 8, Built-In JavaScript Methods
Practice exercises Projects
Word scrambler Countdown timer
Self-check quiz
Chapter 9, The Document Object Model
Practice exercises Projects
Manipulating HTML elements with JavaScript
Self-check quiz
Chapter 10, Dynamic Element Manipulation Using the DOM
Practice exercises Projects
Collapsible accordion component Interactive voting system Hangman game
Self-check quiz
Chapter 11, Interactive Content and Event Listeners
Practice exercises Projects
Build your own analytics Star rater system Mouse position tracker Box clicker speed test game
Self-check quiz
Chapter 12, Intermediate JavaScript
Practice exercises Projects
Email extractor Form validator Simple math quiz
Self-check quiz
Chapter 13, Concurrency
Practice exercises Projects
Password checker
Self-check quiz
Chapter 14, HTML5, Canvas, and JavaScript
Practice exercises Projects
Create a Matrix effect Countdown clock Online paint app
Self-check quiz
Chapter 15, Next Steps
Practice exercises Projects
Working with JSON List-making project
Self-check quiz
Other Books You May Enjoy Index
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