jQuery validation engine is a Javascript plugin aimed at the validation of form fields in the browser.
https://github.com/posabsolute/jQuery-Validation-Engine
JavaScript Libraries and Functions · jQuery Plugin
Get access to data on 912,157 websites jQuery Validation Engine Customers. We know of 183,516 live websites using jQuery Validation Engine and an additional 728,641 sites that used jQuery Validation Engine historically and 77,197 websites in the United States.
Get a list of 912,157 websites using jQuery Validation Engine which includes location information, hosting data, contact details, 183,516 currently live websites and an additional 99,348 domains that redirect to sites in this list. 728,641 sites that used this technology previouslyand 77,197 websites in the United States currently using jQuery Validation Engine.
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