jQuery Form Plugin allows you to easily and unobtrusively upgrade HTML forms to use AJAX.
https://jquery.malsup.com/form/
JavaScript Libraries and Functions · jQuery Plugin
Get access to data on 10,112,504 websites jQuery Form Customers. We know of 1,640,701 live websites using jQuery Form and an additional 8,471,803 sites that used jQuery Form historically and 651,380 websites in the United States.
Get a list of 10,112,504 websites using jQuery Form which includes location information, hosting data, contact details, 1,640,701 currently live websites and an additional 992,336 domains that redirect to sites in this list. 8,471,803 sites that used this technology previouslyand 651,380 websites in the United States currently using jQuery Form.
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