A free and open-source web framework, driven by Google and a community of developers, that utilizes JavaScript to build dynamic single-page applications (SPAs). AngularJS provides a structured approach to developing rich internet applications by extending HTML syntax with expressive features like data binding, dependency injection and templating. Its architecture simplifies the creation of highly responsive and efficient web apps by minimizing page refreshes. This makes AngularJS a favored choice among data professionals looking to build interactive interfaces that seamlessly present analytical insights and visualizations within the same web experience.