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prototype javascript framework a foundation for ambitious web applications home documentation weblog prototype javascript framework advanced javascript made simple prototype is an open source javascript framework that smooths over the rough edges of cross browser development so you can focus on writing kick ass web applications download 1 7 3 september 22 2015 git learn docs tutorials discuss mailing lists irc contribute report bugs patches weblog prototype 1 7 3 the new bugfix release of prototype features lots of tiny fixes and one giant change under the hood a foundation for ambitious web applications prototype takes the complexity out of client side web programming built to solve real world problems it adds useful extensions to the browser scripting environment and provides elegant apis around the clumsy interfaces of ajax and the document object model getting started defining classes and inheritance how prototype extends the dom introduction to ajax using json event delegation using element layout