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1. Getting Started > Web Programming Crash Course

Web Programming Crash Course

The three main technologies we are going to use to build web apps are HTML, CSS, and JavaScript. I’d like to quickly cover each to make sure we’re all on the same page before plowing into the fancy stuff.

Intro to HTML

When you’re browsing the Web, the pages that you are viewing are just text documents sitting on someone else’s computer. The text in a typical web page is wrapped in HTML tags, which tell your browser about the structure of the document. With this information, the browser can decide how to display the information in a way that makes sense.

Consider the web page snippet shown in Example 1-1. On the first line, the string Hi there! is wrapped in a pair of h1 tags. (Notice that the open tag and the close tag are slightly different: the close tag has a slash as the second character, while the open tag does not.)


  

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