Javascript E-Book

William Sullivan

• Herausgeber: WS
• Kategorie: Wissenschaft und neue Technologien
• Sprache: Englisch
• Veröffentlichungsjahr: 2017

Seitenzahl: 108

Beschreibung

☆★☆ Javascript: Javascript Programming For Absolute Beginners☆★☆

The best starter guide for Javascript!

The fundamentals of Javascript are often missed, however, this book's primary focus and emphasis is learning the essentials and to build from the ground up.
 

What You'lll Learn

• The history of Javascript and its uses


• Setting Up Your Environment


• The Vital Basics of HTML and CSS


• Statements, Comments & Variables


• How to properly use jQuery


• String Operators


• Javascript Array Methods


• Loops and Iteration


• How To Use Functions


• And much, much more!
  
   


• Within this book you will learn various mechanisms of Javascript programming: variables, conditional statements, and why learning these core principles lead to success.
  
  Once you gain knowledge of the fundamental building blocks of Javascript you will gain confidence to tackle more complex topics down the road.
  
  Programming books can easily retail for 100s of dollars, why not start with an expert you can trust and for an affordable price?
  
  
  The immense value of this book cannot be understated, and this is a once in a life time opportunity for you to take advantage of and invest in yourself by empowering yourself with the right tools and knowledge for success.
  
  What are you waiting for?
  
  Includes: 21 practice questions!
  
  Note* For best visual experience of diagrams it is highly recommend you purchases the paperback version for best image quality.
  
  ☆★☆ Grab your copy now!☆★☆

Leseprobe

JavaScript: JavaScript Programming for Absolute Beginners

––––––––

Ultimate Guide to JavaScript Coding, JavaScript Programs and JavaScript Language

Table of Contents

Title Page

Javascript: Javascript Programming For Absolute Beginners: Ultimate Guide To Javascript Coding, Javascript Programs And Javascript Language

About The Series

Section 1: Setting Up Your Environment

Section 2: The Browser

Section 3: Window Methods

Section 4: Programming Basics

Section 5: Arrays and Functions

Section 6: String Manipulation

Section 7: How JavaScript Works with HTML and CSS

Conclusion

JavaScript Mock Test Answers

About the Author

© Healthy Pragmatic Solutions Inc.  Copyright 2017 - All rights reserved.

The contents of this book may not be reproduced, duplicated or transmitted without direct written permission from the author.

Under no circumstances will any legal responsibility or blame be held against the publisher for any reparation, damages, or monetary loss due to the information herein, either directly or indirectly.

Legal Notice:

You cannot amend, distribute, sell, use, quote or paraphrase any part of the content within this book without the consent of the author.

Disclaimer Notice:

Please note the information contained within this document is for educational purposes only. No warranties of any kind are expressed or implied. Readers acknowledge that the author is not engaging in the rendering of legal, financial, medical or professional advice. Please consult a licensed professional before attempting any techniques outlined in this book.

By reading this document, the reader agrees that under no circumstances are is the author responsible for any losses, direct or indirect, which are incurred as a result of the use of information contained within this document, including, but not limited to, —errors, omissions, or inaccuracies.

Table of Contents

Introduction

Section 1: Setting Up Your Environment

Section 2: The Browser

Your First JavaScript

JavaScript Tag Placement

External JavaScript Files

The Browser Object Model

Section 3: Window Methods

Window Methods and Events

Window Events

Document Object Model - DOM

Section 4: Programming Basics

Variables

Operator Precedence

Conditional Logic

IF ... ELSE

IF ... ELSE IF

Nested If Statements

Comparison Operators

Logical Operators

The NOT Operator

Switch Statements

while loops

Section 5: Arrays and Functions

Arrays

Arrays and Loops

Functions

Functions That Call Other Functions

Return Values

Function Arguments

Variable Scope

Section 6: String Manipulation

Strings - Changing Case

Strings - indexOf

Strings - charAt

Strings - substr

Strings - Split and Join

Section 7: How JavaScript Works with HTML and CSS

Conclusion

JavaScript Mock Test Answers

Introduction

First, let me congratulate you for taking the time to read my guide to JavaScript. My intention is to guide you through the inner workings of JavaScript. I want you to learn exactly what JavaScript is, how it all works and how all the pieces fit together as well as going into some detail about some of the HTML elements that go together with JavaScript.

JavaScript is an incredibly light language and is easy to learn as well as being dynamic. Brendan Eich designed it in 1995 when he worked for Netscape, the owner of the very first web browser. JavaScript is a web-based programming language that is used for the creation of websites and web pages using other components like Java applets, images and plugins. JavaScript is an open source language and cross-platform and you will find that all the major websites use it as their core programming language.

To help you through, I have included lots of examples for you try yourself – this is the best way to learn something and I hope that it helps you too. There are also several exercises dotted throughout the book, just examples that you can have a go at. These are designed to compound what you have learned in a specific section and I haven't provided any answers for these. They are merely a way for you to practice and I would urge that you go over them over and again until you are confident. These are not just designed to test your knowledge of the subject but also to test whether you have learned the correct way to write the code.  And, at the very end of the book, you will find a mock JavaScript test for you to try, complete with answers.

If you are ready to start learning JavaScript, let’s go.

About The Series

"Javascript Programming For Absolute Beginners " is the another installment in this book series, meticulously developed by me and my passionate programming loving engineering team.

This series will provide you in depth insights and a full introduction to the world of javascript application.

Whenever we cover a new concept, topic or formula I ensure that a full in depth explanation is provided and push your understanding of the modern technology to a whole new level. Diagrams are provided to help maximize and visualize concepts,  enhancing the learning process.

Please understand that this series will challenge your way of thinking. Especially, in later books we will dive into extremely technical topics that will inspire you.

I just need three things from you before we can begin. Please stay committed, focused and passionate throughout the duration of all subject matter.

I have worked tirelessly structuring all this content together in the most practical, easy to read and step by step guide. I try to keep "high tech jargon" to a minimal and keep the flow of  reading seamless and uninterrupted. 

This is the first javascript programming publication  officially released to the public - stay tuned for the newest releases by following my author page:

http://amzn.to/2xXVJqD

or simply find the author page directly under the book on Amazon.com

Feel free to comment and give feedback on potential new topics you'd like to learn about. I gather all input given by readers and take it into serious consideration when writing a new book.

Whenever you are ready, let's dive into javascript programming together! Turn the page. :)

Attribution -  thanks to www.homeandlearn.co.uk for help with some of the code

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Section 1: Setting Up Your Environment

Before you can even begin to write any JavaScript, you are going to need a couple of things – a text editor and a decent web browser that contains tools for web development. For this, we are going to use the Chrome browser and look at a text editor called Brackets.

Chrome

One of the most important things about learning JavaScript is learning the console and that includes how to set it up. Chrome has its own built-in console and this is perfect for inputting your scripts and code – even better, it’s free. This is how you get it:

Open the web browser you are using and type in

www.google.com/Chrome

Download the Chrome browser. From here, it is your choice as to whether you keep Chrome as your primary browser or you just use it for doing your JavaScript. Follow all the on-screen instructions to download and install Chrome browser

Open the Chrome browser and look for an Options circle in the top right corner – click it and you will see some more options

Select More Tools and then Developer Tools

Now select Console and the console pad will load. You should see the symbol > on it – this is your command prompt and it is where all your code will be input.

Now you can begin to use the console in Chrome so take the time out to explore it; learn what it is all about and how to use it.

Shortcut

There is a shortcut to open your console:

●  Download and install Chrome

●  In the address bar, type about: blank and a blank page will load

Getting Started

Now that you have set up your console, you can type console.log() at your command prompt – this will log you in.  Now is the time to begin exploring and learn what JavaScript is all about – as I mentioned earlier, you will find lots of practical examples to help you out through the book so use them and learn. A couple of helpful hints – you can click the button that says Preserve Log to preserve anything that you input and if you want to save your work, right-click anywhere in the console and choose Save As.

Now let’s look at text editors. You can choose any that you want but I would recommend Brackets

Brackets

Brackets is open source and is specifically designed for web development. It is built using JavaScript making it the very best editor, providing plenty of useful tools and help for you to learn how to code much easier and much more effectively.

Open your web browser and type in

http://brackets.io/

Download the version that corresponds to your operating system – Linux, Windows or Mac

When you open Brackets for the first time, you will be presented with a project named “Getting Started.”  Onscreen instructions will show you how to use the features in Brackets

●  Opening a folder is simple – click File>Open Folder. You will see this in the file tree that is to the left of your screen. This is your projects folder and it has some settings related to it. To move between projects, simply click on the root folder name in the tree or you can drag the relevant folder form your operating system into Brackets and it will open.

●  Instead of showing your opened files in tabs, Brackets shows them in a list titles “Working Files” and you will find this above the tree. Clicking on a file in that tree will allow you to view the file but it won’t get put into the Working Files List. This way, you can look through the files without having to open each one. Any changes that are made to a file will be put automatically into the Working Files list and to add a file to the list without having to edit it first, you simply double-click the name.

To begin with, a single editor will be on show in Brackets view but you can split it so you see two editors. These can be horizontal or vertical and to choose, click View and then on Horizontal Split or Vertical Split. The main view will now show as two and you can view two files at the same time. You will also get another Working Files list so you can see what is open in each pane. You can also drag files between the two panes.

Brackets is very clever in that, whatever view layout you had for each project, it will remember it. Opening a project will show you which layout was there when you saved and closed the project. To close split view and go back to a single pane, just click on View and then on No Split. You won’t shut down any open files by doing this; the separate lists of Working Files will now be merged into one and all changes will be stored until you chose to discard or to save them.

Have a play, learn your way around Brackets and then open a new console, ready to start coding.

Section 2: The Browser

Your First JavaScript

Open your text editor and input the following:

<!DOCTYPE HTML>

<HTML>

<HEAD>

<TITLE>-A First Script</TITLE>

</HEAD>

<BODY>

</BODY>

</HTML>

Here we have the beginnings of your webpage – the HEAD and BODY tags and the TITLE area. Save this as first_script.html. A word of note – if you use Notepad as your Editor, change Save As to All File Types otherwise you will have a text file and not an HTML page.

Next, we are going to add some tags so, in-between the BODY tags, type in: