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WHAT IS JQUERY

- Is a free, open javascript library.

- Simplifies the task of creating highly responsive web pages.

- Works across modern browsers.

- Abstracts away browser-specific features, allowing you to concentrate on design

- Focuses on simplifying common scripting tasks

  > Getting and manipulating page content
  > Working with the modern browser event model
  > Adding sophisticated effects

- Most modern web development scenarios involve common patterns

- JQuery makes these scenarios easy (these scenarios : most modern web development scenarios)


BENEFITS OF USING JQUERY

- Leverages your existing knowledge of CSS

- Works with sets of elements

- Performs multiple operations on a set of elements with one line of code (known as statement chaining)

- Hides various browser quirks (so you can concentrate on the end result)

- Is extensible (so you can use third-party-plug-ins to perform specialized tasks, or write your own)


JQUERY BROWSER COMPATIBILITY

- Currently compatible with modern versions of all the main browsers in use today

  > IE 6.0 and later
  > Safari 3 and later
  > Chrome 1 and later
  > Firefox 2 and later
  > Opera 9 and later 

출처 : lynda.com - what is jquery.mov