- Two-way data-binding – data synchronization between the Model and View. Any changes made in the Model are instantly displayed in the View, and vice versa.
- Directives. With directives, Angular.js gives developers the freedom to repeatedly use specific functions, create custom directives, and it keeps the HTML pages organized.
- Dependency injection – an AngularJS built-in mechanism that defines the way software components are dependent on each other. Dependency injection makes components easier to manage as well as more usable.
- MVVM architecture – Model-View-View Model and Model-View-Controller can be implemented using AngularJS to separate the data from the View, as well as make complex applications easy to manage.
- MVC Knowledge. If a developer is unfamiliar with MVC architecture, using Angular.js can become extremely difficult and time-consuming.
- Performance issues. As the AngularJS framework is used to develop dynamic apps, they often end up big in size and start exhibiting glitches as a result.
- Virtual DOM. React.js uses the abstract copy of the real DOM – Virtual DOM. With it, developers can work faster, use hot reloading, and make UI smoother.
- Unidirectional data flow. One-way data flow in ReactJS ensures that any changes made to child elements will not affect the parent elements.
- JSX. React utilizes JSX (basic JS that uses HTML-like syntax) to make components code readable and display how components get put together.
- Reusing code components. With this feature, developers can create isolated ReactJS components that can be modified later and make the development process speedier and more precise.
- Poor documentation. With technologies advancing and updating so fast, it becomes difficult for developers to write proper documentation, and they end up following the information that lacks clarity and completeness.
- High development speed. With the constantly changing development environment, it gets hard for developers to adapt to every change and roll-out continuous updates.
- Steep learning curve. If you want to integrate a UI library into the MVC framework, learning to do it with React.js requires extensive knowledge and putting in a lot of effort.
- Templates. VueJS uses HTML-based templates that combine its instance data with DOM.
- Reactivity. Vue has a highly reactive system in which changes in models instantly update the View.
- Easy integration – Vue.js couples nicely with other applications and server-side frameworks.
- Unnecessarily high flexibility. It is nice to have a flexible framework, but a framework that is too flexible can over-complicate a project and may lead to errors in the code.
- Poor support. It is a relatively new library, with a small team behind it. Do not expect timely updates and plan accordingly if you decided to use Vue.js.
- Ember-CLI — a command-line utility that comes with Ember stack. Ember-CLI provides support for tools including HandleBars, LeSS, SaSS, CoffeeScript, and other.
- Ember templates. Built into Ember’s UI, templates are coded using the HandleBars templating language. They help developers create stunning UIs using less code.
- Ember Inspector. This tool allows developers to inspect Ember objects in the development and debugging processes easier.
- Convention over Configuration. Ember.js is based on Convention over Configuration (CoC) software development paradigm, which helps developers focus more on their app’s features and functionality.
- Steep learning curve. Ember.js’s learning curve is very steep. The framework is not beginner-friendly, and small young companies with a lot of junior developers need to invest time and money, if they want their engineers use Ember.js.
- Outdated resources. Ember has a small community loaded with outdated tutorials.
- Not suitable for big projects. It is extremely challenging to use this framework in large-scale projects, as it will consume too much time and affect overall team productivity.
- Full stack solution.Meteor.js provides a full-stack solution to build and use web applications.
- Extensive packages and libraries. The framework offers a vast collection of libraries and smart packages that are up-to-date and highly reliable, if you aim at boosting the speed of the development process.
- Complex integration. Meteor is difficult to integrate with other frameworks; hence, it is unsuitable for beginners.
- MongoDB Support. From the long list of popular SQL databases, Meteor only syncs with MongoDB.
- Internet connection flexibility. Meteor.js requires a good internet connection. If the internet connection is weak, the chances to lose synchronization between front-end and back-end are high.
- Main feature – Mithril.js facilitates hierarchical MVC components, safe-by-default templates, customizable data binding, and URL routing.
- Flat learning curve. Mithril offers beginner tutorials and a huge API references section that can help developers with everything on the road to building applications.
- Components. Components can be created with the help of an optional controller and the View property.
- Speed – Mithril loads in less than 5 milliseconds, compared to other most popular JS frameworks.
- Unsuitable for complex projects. Due to its simple structure and small API, it might not be a good idea to use this framework for any complex project.
- Suitable for large web applications. Node can use JS to perform functions on both the client-side and server-side of the application. It makes Node suitable for server-heavy application programming.
- Easy integration. With Node.js, no extra effort is required to integrate client data with server data. The same language can be used in working with persistent layers for both client and server sides.
- Corporate Support. Unlike other top JS frameworks, NodeJS is blessed with a large community that keeps on contributing to its further development and improvement.
- Unstable API. Node.js API constantly changes at frequent intervals and remains unstable. When this happens, developers have to make changes to their code to stay compatible with latest Node API.
- Poor third-party software management tools. Node’s numerous tools that are used in installing and managing third-party software are of poor quality. It seems that they have not been supervised properly and fail to meet common coding standards.
- Web components. Built on the idea of reusable web components, Polymer employs them to break apps into portions of fitting size and create usable widgets in web documentation.
- Data binding. Polymer supports both one-way and two-way data binding, which makes the application area extensive.
- Polyfills. Polymer uses modern APIs for web interfaces and offers polyfills for browsers.
- Custom elements. Polymer.js allows developers to create their own custom HTML elements.
- Lack of server-side rendering. While developers can work with PolymerJS on the client side, it cannot be rendered on the server side. As a result, page load speed is affected.
- Limited resources. Polymer.js has a small support community and limited resources available on the web, which makes it less popular in the industry.
- Extensible HTML. With this feature of Aurelia.js, developers can create custom HTML elements for data binding and dynamic loading.
- Multi-language support. Aurelia’s APIs are designed to be compatible with every today’s and tomorrow’s popular programming language.
- Modular framework. Aurelia is made up of small modules, with each serving a particular purpose. They can be used together as a full-featured framework, or employed in building a custom solution.
- Low traction. Unlike other top JS frameworks, AureliaJS does not enjoy much popularity.
- Limited resources. Aurelia.js has a little community and limited resources. As a result, the framework has a steep learning curve.
- Backend synchronization. Backbone.js provides great support for RESTful APIs, so Models can be easily tied to the back-end.
- Event-driven communication. The framework provides an event-driven communication between Models and Views to prevent the code from being difficult to read.
- RESTful JSON Interface. Backbone has a RESTful JSON interface based on the MVP application model. This format is used to perform data serialization and provide better support for browser clients.
- Difficult to learn. Backbone.js has a steep learning curve.
- Unsuitable for large data sets. The framework does not provide any data binding process, which makes it unsuitable for pages with that usually exhibit high data loads.
- Underscore templates. Backbone.js uses Underscore templates that are not as comprehensive as those provided by other top JS frameworks.
Good luck with your project!