Essential JavaScript Design Patterns For Beginners I would like to thank Rebecca Murphey for inspiring me to open-source this mini-book and release it for free download and distribution - making knowledge both open and easily available is something we should all strive for where possible. I would also like to extend my thanks to the very talented Alex Sexton who was kind enough to be the technical reviewer for this publication. I hope that it helps you learn more about design patterns and the usefulness of their application to JavaScript. Volume 2 of Essential JavaScript Design Patterns is currently being written and will be more detailed than this first edition. The ETA for it's online release is late Q4, 2011. For more detailed coverage of specific patterns, you may be interested in my posts on the Pub/Sub (Observer) or Decorator patterns. At the beginning of this book I will be focusing on a discussion about the importance and history of design patterns in any programming language. Patterns are not an exact solution.
How Browsers Work: Behind the scenes of modern web browsers Web browsers are the most widely used software. In this primer, I will explain how they work behind the scenes. We will see what happens when you type google.com in the address bar until you see the Google page on the browser screen. The browsers we will talk about There are five major browsers used on desktop today: Chrome, Internet Explorer, Firefox, Safari and Opera. The browser's main functionality The main function of a browser is to present the web resource you choose, by requesting it from the server and displaying it in the browser window. The way the browser interprets and displays HTML files is specified in the HTML and CSS specifications. Browser user interfaces have a lot in common with each other. Address bar for inserting a URIBack and forward buttonsBookmarking optionsRefresh and stop buttons for refreshing or stopping the loading of current documentsHome button that takes you to your home page The browser's high level structure The browser's main components are (1.1): Syntax:
How to manipulate the DOM in Vanilla JavaScript - freeCodeCamp.org - Medium So you have learned variables, selection structures, and loops. Now it is time to learn about DOM manipulation and to start doing some cool JavaScript projects. In this tutorial, we will learn how to manipulate the DOM with vanilla JavaScript. Before we dive into coding, let’s learn what the Dom really is: The Document Object Model (DOM) is a programming interface for HTML and XML documents. Basically, when a browser loads a page it creates an object model of that page and prints it on the screen. A programming language can be used to access and modify this object model, and this action is called DOM manipulation. For the tutorial, we are going to need two files, one index.html, and the other manipulation.js. <! So there we have our HTML file, and as you can see we have a div with the id of division. 2.1. We can either access a single element or multiple elements. 2.1.1. For accessing a single element, we will look at two methods: getElementByID and querySelector. 2.1.2. 2.2. 2.3. 2.3.1.
Wireless Application Protocol - Wikipedia Wireless Application Protocol (WAP) is a technical standard for accessing information over a mobile wireless network. A WAP browser is a web browser for mobile devices such as mobile phones that uses the protocol. Introduced with much hype in 1999,[1] WAP achieved some popularity in the early 2000s, but by the 2010s it had been largely superseded by more modern standards. Most modern handset internet browsers now fully support HTML, so do not need to use WAP markup for webpage compatibility, and most of them are no longer able to render and display pages written in WAP.[2] Before the introduction of WAP, mobile service providers had limited opportunities to offer interactive data services, but needed interactivity to support Internet and Web applications such as email, stock prices, news and sports headlines. Technical specifications[edit] WAP protocol stack[edit] WTLS, an optional layer, provides a public-key cryptography-based security mechanism similar to TLS. WAP Push[edit] MMS[edit]
How to recreate the new e-bay site scrolling effect In this tutorial we will try to recreate the scrolling effect you’ve seen on the new e-bay site. We’ll create a simple responsive one-page site presenting the beauty and benefits of lavender. No javascript needed – we will use only css. Step 1 – Prerequisities We will need 3 background images, that will stretch to full page width. Mine are about 1800px x 1200px. Step 2 – Html The markup is simple. <! Step 3 – basic css The wrapper class is defined as follows. Since we want each section and the header to behave responsively, we’ll use only percent units. The value of 4.16667% corresponds to 50px when the wrapper has its maximum width. You’ll find the complete stylesheet in the download files. Step 4 – the scrolling effect We don’t use any Javascript, our scrolling effect is obtained purely with css. We just have to assign the background image to each section Step 5 – last tweaks Since background-attachment:fixed is not supported in mobile Safari we’ll add the following media-query And that’s it!
Programming JavaScript Applications Copyright © 2014 Eric Elliott Printed in the United States of America. O’Reilly books may be purchased for educational, business, or sales promotional use. Online editions are also available for most titles ( Nutshell Handbook, the Nutshell Handbook logo, and the O’Reilly logo are registered trademarks of O’Reilly Media, Inc. Many of the designations used by manufacturers and sellers to distinguish their products are claimed as trademarks. While every precaution has been taken in the preparation of this book, the publisher and author assume no responsibility for errors or omissions, or for damages resulting from the use of the information contained herein.
Regular Expression Tutorial - Learn How to Use Regular Expressions This tutorial teaches you all you need to know to be able to craft powerful time-saving regular expressions. It starts with the most basic concepts, so that you can follow this tutorial even if you know nothing at all about regular expressions yet. The tutorial doesn't stop there. It also explains how a regular expression engine works on the inside, and alert you at the consequences. This helps you to quickly understand why a particular regex does not do what you initially expected. It will save you lots of guesswork and head scratching when you need to write more complex regexes. What Regular Expressions Are Exactly - Terminology Basically, a regular expression is a pattern describing a certain amount of text. This first example is actually a perfectly valid regex. \b[A-Z0-9._%+-]+@[A-Z0-9.-]+\. With the above regular expression pattern, you can search through a text file to find email addresses, or verify if a given string looks like an email address. Different Regular Expression Engines
HTML-DOM Cheat Sheet DOM Events Event Object Constant Event Object Methods initEvent() preventDefault() stopPropagation() EventTarget Object addEventListener() dispatchEvent() removeEventListener() EventListener Object handleEvent() MouseEvent/KeyboardEvent Methods initMouseEvent() initKeyboardEvent() Elements Methods toString() HTML Object Properties align archive border code codeBase codeType data declare form height hspace name standby type useMap vspace width Dom Style Generated Content Properties content counterIncrement counterReset Ad
Dynamic Page / Replacing Content By Chris Coyier On This article is an update to this old article, which had an ugly demo and a variety of techniques in it no longer probably considered good practices. This new demo is much cleaner, up to date, and fuller featured. Because the old article was a bit of a different scope, I'll leave it alone, just refer to this one. Update January 2013: There are better practices now, detailed here. Let's say you wanted to make a website where clicking buttons in the nav would dynamically load some content. View Demo Download Files #The HTML: It all works without JavaScript There is no excuse for the navigation of a website to be completely broken without JavaScript enabled. The navigation links to the files that contain that content, and are fully formed functional pages on their own. <nav><ul><li><a href="index.php">Home</a></li><li><a href="about.php">About</a></li><li><a href="contact.php">Contact</a></li></ul></nav> #jQuery JavaScript The JavaScript is the fun part here! #Prereq #Code Dump