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Prototype JavaScript Framework
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<p>The Prototype JavaScript Framework is a <a href="/facts/JavaScript/XhhIIEsl">JavaScript</a> <a href="/facts/Software_framework/EWasA8sG">framework</a> created by Sam Stephenson in February 2005 as part of <a href="/facts/Ajax_(programming)/cS0P0whT">Ajax</a> support in <a href="/facts/Ruby_on_Rails/aG5P6uon">Ruby on Rails</a>. 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<a href="https://en.wikipedia.org/w/index.php?title=Prototype_JavaScript_Framework&action=edit">[update]</a>, according to w3techs, Prototype is used by 0.6% of all websites. </p>