jQuery jQuery framework was first released in 2006 with the goal of simplifying typical JavaScript development tasks. jQuery allows, for example, to perform DOM-tree search and manipulation in a manner very similar to CSS selectors. The framework's functionality is completely separated from specific browsers, which allows developers to write cross-browser compatible code by default.

jQuery is the most popular JavaScript library in the world: more 63% of the world's top million websites make use of it. There are thousands of plugins developed for it by the community. Starting from things like cookie management to large and complex user interface components. Having created jQuery, John Resig has moved web development far ahead, as JavaScript, initially written in just 10 days, hasn't had a unified list of best practice patterns even for simple and trivial tasks.