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jQuery part 3: overview of jQuery
jQuery is an important technology for anyone involved in writing websites or developing business systems that run on the web.
This is where jQuery comes in.
On top of this basic querying facility, jQuery adds many functions. This includes functions to modify the page and respond to events. It includes routines to perform animations, such as moving or fading parts of the page. It includes code to retrieve data from the server, sometimes known as Ajax. These functions cope with the differences between browsers, so scripts work the same whatever browser the user chooses. The functions make it much easier to write the types of code that modern websites require.
However, for all its benefits, jQuery is not magic. You do need to use it wisely. Specifically:
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