Vue.js is an open-source JavaScript framework that enables developers to create user interfaces and single-page applications. Although it can be difficult to determine whether Vue is a library or a framework, it is a progressive framework that offers both library-like and framework-like features. Vue stands apart from other solutions due to its emphasis on simplicity and performance, as well as its component-based architecture that enables users to easily share code across projects. Therefore, it does not matter if Vue is classified as a library or framework; what matters is that developers take advantage of its beneficial features!