Object Oriented JavaScript Class for Developers - www.htmlgoodies.com sohguanh: Recently, due to the need to learn AJAX coding, I discovered that JavaScript has changed a lot in the last few years--and the different kinds of syntax used to create objects in JavaScript can be mind-boggling! I come from a C, C++, Visual Basic, Java, Perl and PHP background, and have recently moved on to JavaScript. My knowledge of JavaScript is from the late 90's era where it was used for simple scripting purposes. Object Oriented JavaScript: The Questions For others like myself, a few questions come to mind about Object Oriented (OO) JavaScript, including: Is there an Interface concept in JavaScript? Is there an abstract class concept in JavaScript? Object Oriented JavaScript: The Answers Our answers come from WebDeveloper.com rnd me, who comes from a different background than the member who posed the questions. First, let me start by saying that a lot of these terms can be ambiguous.
Intro Javascript--what the heck is it? Is it a really difficult programming language that casual web designers should be afraid of? What is it used for? JavaScript has been around for several years now, in many different flavors. By definition, JavaScript is a client-side scripting language. There are many uses (and abuses!) Clocks Mouse Trailers (an animation that follows your mouse when you surf a site) Drop Down Menus Alert Messages Popup Windows HTML Form Data Validation Before you begin this tutorial, you should have basic knowledge of HTML. This tutorial will cover the basics of JavaScript, from where to place your JavaScript all the way to making your own JavaScript functions. We recommend that you read a few lessons a day and practice what you have learned. Report a Bug or Comment on This Lesson - Your input is what keeps Tizag improving with time!
Important guidelines First let's learn some important stuff. There are lots of browsers out there that cannot support JavaScript. Although browsers generally support more and more with each release, the language itself keeps evolving, and there is already a vast amount of the JavaScript language available for browsers to support. No browser will ever support all of it, and you cannot expect them to. There are many reasons why people cannot or will not 'upgrade' to your chosen browser. Whatever their reasons, you should not stop them from using your site. There are also many browsers out there that you do not realise exist. There is no magic formula for this, but the basic rules are that you should not detect a browser make or version. This tutorial should help you learn how to correctly detect capabilities, and wherever needed, it will show you how to work out when a browser cannot do what you need, so you can halt your script, or provide an alternative.
Java script tutorial for the total non-programmer New from Webteacher Software and partners, GoogleMapBuilder.comAn easy interface to turn any spreadsheet into a Google Map Webteacher Software now offers Welcome To JavaScript for the Total Non-Programmer This tutorial will take you step by step through the fundamentals of Javascript. You will learn how to write functions, use data from text boxes, create IF-THEN conditionals, program loops, and generally make your web page "smarter." I teach computer classes for a living to corporate clients of all levels. If you find this tutorial helpful, please let me know (it's my only reward). What is JavaScript? Javascript is an easy-to-use programming language that can be embedded in the header of your web pages. What's the difference between JavaScript and Java? Actually, the 2 languages have almost nothing in common except for the name. What is Object Oriented Programming? Everyone that wants to program JavaScript should at least try reading the following section. Objects and Properties Methods
JavaScript Introduction Online JavaScript Courses & Tutorials | LearnStreet Argument A variable that represents a value passed into a function or method. Arithmetic Operator One of several operators that perform arithmetic between variables or values. They include; +, -, *, /, %, ++, -- Array An Object that represents a list of elements that are accessed by their position within the list. Assignment Assigning a value to a variable or property. Assignment Operator One of several operators that assign a value to a variable. Booleans Syntax Example expression1 && expression2expression3 || expression4! Break A statement that will cause immediate exit from a loop once it is encountered and normal flow of execution will continue with the statement immediately following the loop. Case Used in conjunction with a Switch statement, the "case" statement identifies a value for a conditional test against the switch parameter. Code Block A grouped collection of statements that are meant to be executed together and most often denoted by surrounding curly braces. Code comments Conditional Test
JavaScript Tutorial for Programmers Advanced JavaScript Tutorial JavaScript is Netscape's cross-platform, object-based scripting language for client and server applications. It has dominated the world of internet scripting languages for a long time now. Uses of JavaScript JavaScript lets you create applications that run over the internet. Using JavaScript, you can create dynamic HTML pages that process user input and maintain persistent data using special objects, files, and relational databases. The Advanced JavaScript Tutorial assumes you know the basics of JavaScript language - if you don't already know it, I would suggest to take the time to learn it now. T-Box If you still think that you don't need the basic tutorial, let me introduce you to a unique feature of this tutorial - The T-Box or the Test box. This is a T-Box. Microsoft Internet Explorer Choose Tools -> Internet Options, and select the 'Advanced' tab. If done correctly, the above example( aler("This is wrong") ) will show an error 'Object expected'(IE) or 'aler is not defined'(Mozilla).
Java script tutorial for the total non-programmer New from Webteacher Software and partners, GoogleMapBuilder.comAn easy interface to turn any spreadsheet into a Google Map Webteacher Software now offers Welcome To JavaScript for the Total Non-Programmer This tutorial will take you step by step through the fundamentals of Javascript. You will learn how to write functions, use data from text boxes, create IF-THEN conditionals, program loops, and generally make your web page "smarter." I teach computer classes for a living to corporate clients of all levels. If you find this tutorial helpful, please let me know (it's my only reward). What is JavaScript? Javascript is an easy-to-use programming language that can be embedded in the header of your web pages. What's the difference between JavaScript and Java? Actually, the 2 languages have almost nothing in common except for the name. What is Object Oriented Programming? Everyone that wants to program JavaScript should at least try reading the following section. Objects and Properties Methods
Javascript Tutorial In this lesson, we'll learn about the core functionality of the JavaScript language. Lesson Goals To work with the HTML DOM.To follow JavaScript syntax rules.To write JavaScript inline.To write JavaScript in script blocks.To create and link to external JavaScript files.To work with JavaScript objects, methods, and properties.To reference HTML elements with JavaScript.To use event handlers. In this course, we refer to the language we are learning as JavaScript, which is what it is usually called. The HTML Document Object Model (DOM) is the browser's view of an HTML page as an object hierarchy, starting with the browser window itself and moving deeper into the page, including all of the elements on the page and their attributes. As shown, the top-level object is window. Basic Rules JavaScript statements end with semi-colons. Dot Notation In JavaScript, elements (and other objects) can be referenced using dot notation, starting with the highest-level object (i.e, window). Try this: Press Enter.
How to Create A Simple Web-based Chat Application In this tutorial we will be creating a simple web-based chat application with PHP and jQuery. This sort of utility would be perfect for a live support system for your website. The chat application we will be building today will be quite simple. It will include a login and logout system, AJAX-style features, and will also offer support for multiple users. We will start this tutorial by creating our first file called index.php. We start our html with the usual DOCTYPE, html, head, and body tags. We will now add some css to make our chat application look better than with the default browser styling. There's nothing special about the above css other than the fact that some id's or classes, which we have set a style for, will be added a bit later. As you can see above, we are finished building the chat's user interface. Now we will implement a simple form that will ask the user their name before continuing further on. We are not yet finished creating the login system for this chat application.
Thau's Advanced JavaScript Tutorial If you’ve gone through Thau’s basic JavaScript tutorial (or you already know a bunch about the subject), Thau’s advanced JavaScript course is just for you. In the previous tutorial, Thau taught the basics. He picks up here where he left off, starting with the meaning of var and if-then-else statements. He moves along to show you how to make cookies (Mmmmm), and you’ll learn fancy string handling and associative arrays along the way. Give your JavaScript a sense of history and time (by setting timelines on your pages so that different events occur at different times), and then learn how to sense which browser your visitors are using. Next, his Thauness gives lessons on image mapping and preloading images, with practical applications such as setting up an employee database and creating a virtual pet! By the end of the five lessons, Thau puts the finishing touches on your JavaScript mastery, covering JavaScripting tools, debugging techniques, and ways to make your code sprint like the wind.
JavaScript Tutorial