Template engines allow for easy and flexible UI building.
Allows for nesting view templates into top-level views from within a template.
The MIT License is a very permissive license which allows all uses, including business use, without warranty.
Has an official or well known boilerplate project which lays out the recommended file structure and allows developers to get started faster.
Other frameworks might be locked with a template engine you don’t like and there is nothing you can do about it.
Legacy browser support can be important for corporate projects and projects with a large user base consisting of Internet Explorer users.
Plugins offer an easy way to extend the functionality or integrate with other services. A high number of plugins may indicate an active community of users. Only official plugins are taken into account.
This shows that the framework has a living ecosystem, large community support and allows for more flexibility and faster development.
Includes utilities to keep models in sync with their server-side representation without the need of writing jQuery boilerplate ajax calls.
Plugin to help validate client input before it gets processed or sent to a server. While this does not replace server-side validation, it can vastly improve the user experience.
Has plugin which offers a simple functionality to synchronize models with the HTML5 LocalStorage.
Asynchronous Module Definition libraries allow for easy modular, clean programming. If a framework does not work well with such libraries, it might have some other means to modularize its components and resolve dependencies, like Dependency Injection.
Bower is an easy-to-use, npm-like package manager for frontend applications.
The node package manager can also be used for managing front end scripts.
Has the popular utility library underscore.js as a dependency. Underscore includes helper functions for list manipulation and functional programming.
Can be extend to support models and views updating each other. This adds more filesize but allows for more flexibility.
Models are observed for changes. This is a well known pattern. Can be more performant than dirty-checking in some cases.
Smaller file size means faster load times.
Routing allows interaction with the browser url. This is very important for a good user experience if you are building one-page apps.
Supports a template engine that can be pre-rendered on the server. This possibly improves page speed, especially on devices with low computing power.
This greatly improves search engine crawlability. This possibly improves page speed, especially on devices with low computing power.
Less dependencies means less extra scripts to include, usually resulting in less development overhead and faster load times.
Allows the use of libraries like jQuery Deferred to support promises. Promises are a popular alternative to callbacks when dealing with server responses.