HTML5 Web Application Development By Example by J. M. Gustafson

By J. M. Gustafson

HTML5's new positive aspects have made it a true program improvement platform with common adoption through the for this function. having the ability to create one software which could run on nearly any gadget from mobilephone to computer has made it the 1st selection between builders. even supposing JavaScript has been round for your time now, it wasn’t until eventually the creation of HTML5 that we've got been in a position to create dynamic, feature-rich purposes rivaling these written for the desktop.

HTML5 net program improvement via instance provide you with the information you want to construct wealthy, interactive net functions from the floor up, incorporating the preferred HTML5 and CSS3 positive factors to be had without delay. This booklet is stuffed with advice, instruments, and instance purposes that would get you begun writing your personal purposes today.

HTML5 internet program improvement by means of instance indicates you ways to jot down net functions utilizing the most well-liked HTML5 and CSS3 beneficial properties. This booklet is a pragmatic, hands-on consultant with various real-world and suitable examples.

you'll tips on how to use neighborhood garage to avoid wasting an application’s country and comprise CSS3 to make it glance nice. additionally, you will the right way to use customized info attributes to enforce info binding. We’ll use the hot Canvas API to create a drawing program, then use the Audio API to create a digital piano, earlier than turning all of it right into a game.

The time to begin utilizing HTML5 is now. And HTML5 net program improvement by means of instance offers you the guidelines and information to get started.

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5 and having colors red, green, and blue (yes, you can draw circular elements, which we'll see in the next section): [ 40 ] Chapter 2 In addition to RGB colors, CSS3 also supports HSL colors, which stands for Hue, Saturation, and Lightness. HSL is based on a color wheel that is full color at the edges and fades to gray in the center. Now extend the wheel into a cylinder that is black at the bottom, white at the top, and full color in the middle. That is the theory around HSL colors. It is specified using hsl(h, s, l).

Before updating the name we check to make sure that the user actually typed something in. If so, we update the task name. Finally, we call show() to make the task name visible again. The user sees the text field turn back into static text. [ 27 ] The Task at Hand There is one last thing left to do. If the user clicks off the field without changing anything, we will not get a change event and the text field will not get hidden. We can get a blur event when this happens though. show(); }); What just happened?

Next, we add another function call onto the end of the keypress() handler to set the focus back to the text field. At this point you're probably asking yourself, how does that work, calling a function on a function? This is called function chaining and is perhaps one of the most useful features of jQuery. Most of jQuery's methods return a pointer to the object itself, so we can perform multiple actions in a single line of code. Now we'll write that addTask() method. append($task); } First we get the value of the new-task-name text field using jQuery's val() method, which is used to get the value of input fields.

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