When choosing a JavaScript framework, there are a number of factors to consider, including:
The type of application you are building: Some JavaScript frameworks are better suited for certain types of applications than others. For example, React is a good choice for building single-page applications (SPAs), while Ember.js is a good choice for building complex enterprise applications.
Your team's experience: If your team is already experienced with a particular JavaScript framework, it may make sense to stick with that framework, as it will reduce the learning curve.
The community and ecosystem: Some JavaScript frameworks have larger and more active communities than others. This can be important, as a large and active community can provide support and resources to help you develop your application.