Ember.js
Ember.js is an open-source JavaScript web framework for building ambitious single-page applications (SPAs) and complex web interfaces. It follows the convention over configuration principle and provides a complete solution with built-in tools for routing, data management, and testing. The framework emphasizes productivity and maintainability through its strong conventions and integrated ecosystem.
Developers should learn Ember.js when building large-scale, data-driven web applications that require long-term maintainability and a structured approach. It is particularly well-suited for enterprise applications, content management systems, and complex dashboards where consistency and developer productivity are critical. The framework's integrated tooling and conventions reduce decision fatigue and ensure best practices are followed out-of-the-box.