Download e-book for kindle: Start Here! Learn JavaScript by Steve Suehring

By Steve Suehring

ISBN-10: 0735666741

ISBN-13: 9780735666740

Ready to benefit JavaScript? commence Here!

Learn the basics of contemporary programming with JavaScript—and start development your first apps for the net. in case you have no prior adventure with JavaScript, no problem—simply begin right here! This publication introduces must-know suggestions and strategies via easy-to-follow motives, examples, and exercises.

Here’s the place you begin studying JavaScript
* study the fundamentals of JavaScript programming
* the way to entry browser content material from JavaScript
* deal with photographs and validate shape entries
* Retrieve facts utilizing the JavaScript item Notation (JSON)
* Use JavaScript and HTML5 in home windows eight purposes
* placed all of it jointly via developing your first courses

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Figure 1-8 Making basic edits on your first webpage through Visual Studio. 7. If you haven’t already saved the file, save it now. On the File menu, click Save or use the Ctrl+S keyboard shortcut. In some versions of Visual Studio, you’ll see a Save File As dialog, as shown in Figure 1-9. html. Note that you might not see this dialog at all if you’re using Visual Studio Express Edition for Web. html within the project. Chapter 1 What Is JavaScript? 15 Tip Make sure you save the file within the project itself, as shown in this dialog.

A similar scenario occurs if you call the function with more arguments than expected. JavaScript will silently ignore extra arguments as if they never existed. How rude! With that said, in JavaScript the function declaration isn’t the only place where you can define what arguments are expected. In other words, you don’t have to declare the inputs in the function declaration as you saw in the example where two arguments (num1 and num2) were included in the function declaration itself. JavaScript creates an array called arguments and populates it with the arguments sent into a function.

12 Start Here! Learn JavaScript Figure 1-5 An empty web project in Visual Studio 11. 3. For this first example, add an HTML file. On the File menu, select New File. The New File dialog box appears, such as the one shown in Figure 1-6. Figure 1-6 The New File dialog within Visual Studio 11 is where you add new files to your project. Chapter 1 What Is JavaScript? 13 4. html, and then click Add. Depending on the version of Visual Studio you’re using, you might see a basic HTML page that uses an XHTML document type similar to that in Figure 1-7.

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Start Here! Learn JavaScript by Steve Suehring


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