The World Wide Web (www) is an open source information space where documents and other web resources are identified by URLs, interlinked by hypertext links, and can be accessed via the Internet. It has become known simply as the Web. The World Wide Web was central to the development of the Information Age and is the primary tool billions of people use to interact on the Internet.
The World Wide Web was invented by English scientist Tim Berners-Lee in 1989. He wrote the first web browser in 1990 while employed at CERN in Switzerland.
As the use increases, the frustration over congestion issues in the Internet infrastructure and the high latency that results in slow browsing has led to new ways of thinking and evolvement in developing webpages.
Now more and more of the webpage work in viewing and changing data on the webpage is done on the users PC.
AngularJS (commonly referred to as "Angular" or "Angular.js") is an open-source web application framework mainly maintained by Google and by a community of individual developers and corporations to address many of the challenges encountered in developing single-page applications.
It is possibel to implement AngularJS in Drupal or we can make a standalone application. You will find several demos on this site.
Bootstrap is a front end framework, that is, an interface for the user, unlike the server-side code which resides on the "back end" or server.
It is possibel to implement Bootstrap in Drupal