Prototype JavaScript Framework

Prototype

Original author(s)	Sam Stephenson
Developer(s)	Prototype Core Team
Initial release	February 2005; 19 years ago (2005-02)
Stable release	1.7.3 / September 22, 2015; 8 years ago (2015-09-22)
Repository	github.com/sstephenson/prototype
Written in	JavaScript
Type	JavaScript library
License	MIT License
Website	prototypejs.org

The Prototype JavaScript Framework is a JavaScript framework created by Sam Stephenson in February 2005 as part of Ajax support in Ruby on Rails. It is implemented as a single file of JavaScript code, usually named prototype.js. Prototype is distributed standalone, but also as part of larger projects, such as Ruby on Rails, script.aculo.us and Rico. As of March 2021^[update], according to w3techs, Prototype is used by 0.6% of all websites.^[1]