Ember.js
Ember.js is a JavaScript framework for building modern web applications. They have a smaller community compared to React or Angular but it is know for its stability and is currently used by many large companies. Ember.js follows the convention over configuration principle and provides tooling through Ember CLI. Go to emberjs.com to find out more.
React
React is probably one of the more well known if not the most used frameworks. It is developed and maintained by Facebook. React excels in building user interfaces with a component-based architecture. There is tons of information out ther on it and is know to have a gentle learning curve with a extensive libraries and tools. With it's popularity it makes for a good choice fo rboth beginners and experienced developers. Go to react.dev to learn more.
Angular
Angular is another big framework and is maintained by Google. Seems to be geared towards large-scale enterprise applications. Angular uses TypeScript, offering enhanced type checking and object-oriented features. This framework probably has a more steep learning curve then React but remains a good choice for complex applications. Go to angular.dev to find out more.
Summary
I provided some information on two of the more popular frameworks and another that may not be as well known. There are quite a few more to choose from then just these such as next.js which can extend Reacts capabilities with server-side features. Choice in framework often depends on specific project requirements and a businesses needs.