Our first program

We need to set up our workspace to write all the examples of this book. Let's create a folder named learning-ext-5. For now, we don't need a web server to host our examples, but in the following chapters we are going to use Ajax; therefore, it's a good idea to use your favorite web server to host our code from these first examples.

In our new folder, we are going to create folders that contain the examples for each chapter in this book. At this point, we have a folder called chapter_01 that corresponds to this chapter and other called extjs-5.1.1 that contains the Ext JS framework. Both folders are located on the same level.

Inside the chapter_01 folder, we're going to create a file called myfirstapp.html, where we need to import ...

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