The little time it takes to get one of our programmers to go from Mainframe programming to true GUI coding, literally just one day. Review collected by and hosted on G2.com.

Nothing to dislike within Sencha Period. We have a harder time teaching older programmers which editor to use and them learning that. The code is a cake walk with EXTJS. Review collected by and hosted on G2.com.

This tool is good and it has all the components to develop web applications much faster, its interface is excellent and fluid, the support is always updated to lend a hand, the whole system is configurable and best of all it is customizable, it is good. Review collected by and hosted on G2.com.

We had tried other tools and there were always a lot of common problems and glitches, but really this one is perfect and great and I wouldn't complain about anything in the world. Review collected by and hosted on G2.com.

Firstly components, ExtJs has components for every web/mobile widget possible, these components are unlike components in React or Angular. It provides fully built in component with all added features and styling and adding custom features are just a breeze by setting config properties or custom listeners. Where as in React or Angular components you need to write your own component and follow the typescript or react jsx code methodology to customize the component.

Secondly, MVVM makes it working with component state and with almost no need to use DOM lookup just like any other modern web frameworks.

Thirdly, Universal app capability same app can be built for classic and modern.

Moreover, Features like mixins, binding, formulas, privates, statics, overrides are unlike anything in any modern framework.

The new 7.0 classic Material theme is beautiful and it gives any app a modern look.

Learning Extjs is good enough to build whole front application in a modern way, unlike Angular or React where you need to learn Bootstrap.js, typescript for html and binding for angular application.

For React you need to learn Redux, Redux form, Redux Thunk, React Router Dom, Axios for calling Ajax or Rest calls, React Context, React Hooks etc etc. Something new comes up and you no longer use Redux Thunk now we use Redux Sagas etc etc. :)

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Only drawback I can think of for Extjs where I think it needs a little work is to make better Garbage collection and make DOM lightweight and create a mechanism to detect memory leaks like unused stores etc. Review collected by and hosted on G2.com.

Sometimes the documentation is lacking, and the only way to figure out how something works is to dig into the source code.

If you need to build something that doesn't fit inside the framework, sometimes it can be a bit difficult to get to work with the framework itself.

Also, the fact that it is a proprietary framework makes it difficult to find examples and community support sometimes.

Examples given are almost always the most basic possible example, and have no real life application.

The Architect product that they tried to push isn't really that useful for anything but basic prototyping. It seems like a good idea, but it's not really useful for making an actual application.

It's also not the quickest framework to learn, since there is so much to it.

I've run into some issues with memory leaks where things don't necessarily get collected by the garbage collector. That could be my fault as much as theirs, though. Review collected by and hosted on G2.com.

Sometimes the documentation is lacking, and the only way to figure out how something works is to dig into the source code.

If you need to build something that doesn't fit inside the framework, sometimes it can be a bit difficult to get to work with the framework itself.

Also, the fact that it is a proprietary framework makes it difficult to find examples and community support sometimes.

Examples given are almost always the most basic possible example, and have no real life application.

The Architect product that they tried to push isn't really that useful for anything but basic prototyping. It seems like a good idea, but it's not really useful for making an actual application.

It's also not the quickest framework to learn, since there is so much to it.

I've run into some issues with memory leaks where things don't necessarily get collected by the garbage collector. That could be my fault as much as theirs, though. Review collected by and hosted on G2.com.

Documentation and the structured programming paradigm. Superb browser compatibility and performance. Once the learning period is over it is easy to get productive. Review collected by and hosted on G2.com.

Some releases have been far from perfect and lacked testing and quality. Their tool-chain is fragile and takes some time getting used to. Some components are a too rigid and it takes much to get a "modern" look and feel. Review collected by and hosted on G2.com.

provide framework for building interactive across web platform Review collected by and hosted on G2.com.

has worked as implemented for no dislike on it. Review collected by and hosted on G2.com.

Easy to learn, minimal amount of effort to design and manage. Customizable and enforce the dev team to utilize the same. Review collected by and hosted on G2.com.

Converting from the classic to the modern toolkit is not easy, especially when native ECMA script is not supported, including the theme. Review collected by and hosted on G2.com.

- Modularised approach to javascript coding .

- API is are easy to use .

- Comprehensive documentation page .

- Active community users . Review collected by and hosted on G2.com.

- Too many api 's which tends to look like framework is heavy . One suggestion would be to have lighter version . Review collected by and hosted on G2.com.

All the front-end components in one framework. The apps developed with EXTJS at our university have been the most stable, all browser compatible & robust ones created. Standardizing on one framework has saved us a substantial amount of work and helped with cross-training efforts. Review collected by and hosted on G2.com.

While there is a substantial learning curve to implementing this framework, there are tons of articles, examples, etc.. available to help you learn it. Also, while the learning curve is steep at first it completely drops off once you code your first component as you can pretty much code all the components the same way. Review collected by and hosted on G2.com.

Many components for your needs. Also components are extendable. Project structure is robust. In my opinion Ext JS have worlds best manual. It supports MVC, MVVM. You can use bindings for realtime updating. Review collected by and hosted on G2.com.

Learning is hard. Sometimes bugs are very annoying but after v6 i don't get any problem. Review collected by and hosted on G2.com.