Google Hosted Libraries is a globally available content distribution network for the most popular, open-source JavaScript libraries.
https://developers.google.com/speed/libraries/
JavaScript Libraries and Functions
Get access to data on 36,956,761 websites that are Google Hosted Libraries Customers. We know of 10,119,233 live websites using Google Hosted Libraries and an additional 26,837,528 sites that used Google Hosted Libraries historically and 929,554 websites in the United States.
Get a list of 36,956,761 websites using Google Hosted Libraries which includes location information, hosting data, contact details, 10,119,233 currently live websites and an additional 2,014,395 domains that redirect to sites in this list. 26,837,528 sites that used this technology previouslyand 929,554 websites in the United States currently using Google Hosted Libraries.
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