Prototype is a javascript framework which aims to ease development of dynamic web applications.
https://www.prototypejs.org
JavaScript Libraries and Functions · JavaScript Library
Get access to data on 2,671,612 websites that are Prototype Customers. We know of 459,868 live websites using Prototype and an additional 2,211,744 sites that used Prototype historically and 115,703 websites in the United States.
Get a list of 2,671,612 websites using Prototype which includes location information, hosting data, contact details, 459,868 currently live websites and an additional 333,626 domains that redirect to sites in this list. 2,211,744 sites that used this technology previouslyand 115,703 websites in the United States currently using Prototype.
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