The Big Three – HTML, CSS, Javascript

Web pages have three key technologies on which they can draw. The big three are:

HTML (Hypertext Markup Language) - Provides structure to you document. Often described as providing semantic markup - the HTML should give structure and meaning to the content. For example a <h1> heading tag marks the content as a heading, both structurally and sematically. The HTML also describes the DOM (Document Object Model).

CSS (Cascading Stylesheets) - A complimentary technology to HTML, CSS's role is to style the document adding colour, setting fonts, laying out the design of the web page. CSS provides a set of selectors allowing the designer to identify different aspects of the document.

Javascript – Javascript adds interaction to the web page. Javascript can respond to events such as the user clicking on an image. Javascript responds by rewriting parts of the HTML. Note, the events that Javascript can respond too can be as simple as the page loading.

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