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  • Book Overview & Buying HTML5 Web Application Development By Example : Beginner's guide
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HTML5 Web Application Development By Example : Beginner's guide

HTML5 Web Application Development By Example : Beginner's guide

By : Jody Gustafson
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HTML5 Web Application Development By Example : Beginner's guide

HTML5 Web Application Development By Example : Beginner's guide

4.3 (4)
By: Jody Gustafson

Overview of this book

HTML5's new features have made it a real application development platform with widespread adoption throughout the industry for this purpose. Being able to create one application that can run on virtually any device from phone to desktop has made it the first choice among developers. Although JavaScript has been around for a while now, it wasn't until the introduction of HTML5 that we have been able to create dynamic, feature-rich applications rivaling those written for the desktop. HTML5 Web Application Development By Example will give you the knowledge you need to build rich, interactive web applications from the ground up, incorporating the most popular HTML5 and CSS3 features available right now. This book is full of tips, tools, and example applications that will get you started writing your own applications today. HTML5 Web Application Development By Example shows you how to write web applications using the most popular HTML5 and CSS3 features. This book is a practical, hands-on guide with numerous real-world and relevant examples. You will learn how to use local storage to save an application's state and incorporate CSS3 to make it look great. You will also learn how to use custom data attributes to implement data binding. We'll use the new Canvas API to create a drawing application, then use the Audio API to create a virtual piano, before turning it all into a game. The time to start using HTML5 is now. And HTML5 Web Application Development by Example will give you the tips and know-how to get started.
Table of Contents (13 chapters)
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12
Index

Debugging web workers

Debugging web workers can be difficult. You don't have access to the window object so you can't call alert() to display a message or console.log() to write out to the browser's JavaScript console. You can't write out a message to the DOM either. You can't even attach a debugger and step through the code. So what's a poor developer to do?

One thing you can do is add an error listener to the worker, so you get notified of any errors inside the worker's thread:

worker.addEventListener("error", function(e)
{
    alert("Error in worker: " + e.filename + ", line:" + e.lineno + ", " + e.message);
});

The event object passed into the error handler contains the filename, lineno, and message fields. From those you can tell exactly where an error happened.

But what if you aren't getting an error, things just aren't working right? First of all, I recommend that you keep the code that does all of the...

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HTML5 Web Application Development By Example : Beginner's guide
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