HTML5 Canvas Drag-and-Drop
The HTML5 canvas element creates a sketchpad area on a webpage where you can use JavaScript to draw 2D shapes, graphics, animations, render bitmap images, and even create online presentations and build dynamic browser games. In this article you'll learn how to use drag-and-drop in your canvas projects. More ...
JavaScript Variable Scope
Understanding variable scope is very important, because if you don't use scope properly, you could end up with unexpected results and a very confusing bug. The scope of a variable refers to the parts of the code from which it's visible. More ...
Easy JavaScript Web Storage Code
In the past allowing web pages to store data on your PC was considered too dangerous. Cookies can not be considered permanent and reliable storage. HTML5 brings us web storage, providing methods to store keyword/value data pairs in the user's browser. More ...
Basic State Machines
A State Machine is a program, logic circuit, or mechanical device, that has a finite number of legal states. For example a traffic control signal can be red, yellow, or green. It can't be red and green. It can't be violet. More ...
Calculators For Your Web Site : Length Units Converter
In this article, I provide you with Java Script code for a Length Units Converter. For example, your visitor can enter a length in English feet and it will be converted to a length in metric meters. I keep the code as simple as possible. More ...
Regular Expressions Subexpressions
In this article you learned how to use subexpressions to rearrange matches in a regular expression and how to replace the value of a subexpression match in the results. More ...
Easy Slide Show Code with Mouseover Pause
This article provides easy-to-use cut-and paste code for a Web page slide show, except this example has the extra feature that when the visitor moves their mouse pointer over the image, the slide show image will not change again until they move their mouse pointer off the image. More ...
Convert Mixed Number to Decimal
Wouldn't it be convenient if the user was allowed to enter mixed numbers into a form rather than having to mentally convert them decimals? This code is designed to accept both decimal and mixed number input. More ...
Calculators for Your Website : Fahrenheit to Celsius Converter
In this article, I provide you with Java Script code for a Decimal to Fahrenheit to Celsius / Celsius to Fahrenheit Converter. I'll explain the code in detail so that you can have confidence modifying it for use on your website. More ...
A JavaScript Function That Returns a Function
Its a fad now in JavaScript to code functions that return functions in order to avoid declaring global variables but the procedure is inefficient and unnecessary. More ...
HTML5 Canvas Storing and Clearing Transformations
With HTML5 Canvas, it's possible to save the current transformation, do some drawing and transforming, and then restore the old transformation. More ...
Easy Graph Generating Code
If you want to display a graph on your web page, you could use a graphics program to draw the graph, but that's time consuming and the resulting graph is static, it can't change or grow. In this article I will show you how to generate graphs using JavaScript. More ...
