JQuery is a cross-browser lightweight JavaScript library. In simple words jQuery has been designed to make navigation to any element easier, or adding/invoking event handlers on your HTML page and also simplify the way you access the elements in your web pages, provide help in working with client-side events, enable visual effects like animation, and make it easier to use Ajax in your applications.

A quick look at what is available in jQuery:

• Cross-browser support and detection.
• AJAX functions
• CSS functions
• DOM manipulation
• DOM transversal
• Attribute manipulation
• Event detection and handling.
• JavaScript animation
• Hundreds of plugins for pre-built user interfaces, advanced animations, form validation, etc.
• Expandable functionality using custom plugins.

jQuery – Write Less, Do More!

jQuery is fast, lightweight and feature-rich client-side JavaScript Library/Framework which helps in to traverse HTML DOM, make animations, add Ajax interaction, manipulate the page content, change the style and provide cool UI effect.