Are you into building websites? I use something called react, which is a javascript library
hi
React allows us web designers to create large web-applications that use data that can change without reloading the page.
yes maybe also web designers and web applications.
React is maintained by both facebook, instagram and a community of individual developers and corporations.
yes,very rarely sometimes in facebook and instagram.
it aims to provide speed, simplicity and scalability 
yes, its speed,simplicity and scalability are that currect.
It was created by a software engineer at facebook.