Full support for Typescript built in
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Pro Small, easy to learn API
Most other frameworks either offer a huge API to deal with model and view synchronization, or defer to other libraries & plugins to cater for relatively simple use cases. Mithril's API is tiny but complete. The natural reaction is to assume something is missing, but as you build you realise you incredibly fast, powerful and rich applications can be built using nothing but Mithril.
Pro Fast rendering
Mithril's loading times are very fast. This is because it's templates are compiled first and then served to the browser and because it uses a virtual DOM. The virtual DOM is a virtual tree containing all the nodes of the real DOM, every time anything changes in the virtual DOM, Mithril does not re-render the entire (real) DOM, instead it just searches and applies the differences.
Pro No need to learn another syntax to write views
Most MVC frameworks use HTML templates to render their views. They are good and useful because they are easy to read and understand. But they add more complication to an app because it's practically a new language and syntax that needs to be learned.
Pro Familiar to people used to MVC
Doesn't lock you into any complicated conventions or structures, only one function is required to create either a Controller or a View. You're free to implement your architecture exactly as you want, so you can focus on the purpose of MVC, making connections between computer data and stuff in the end user's head.
Pro Small size
Weights just 8Kb gzipped and has no dependencies. A reactive stream module can be added for one extra Kb.
Pro Great documentation
Mithril has a large and expansive documentation despite it's relatively small API. Mithril's GitHub repo has more documentation than actual source code. None of that documentation is auto-generated
Pro Allows a smooth transition from other UI frameworks
One thing you need to start using Mithril is just a DOM node. With Mithril a developer is able to introduce the library step by step.
Pro Can be used without build systems
Pro Does not force you into a predefined structure
Pro Out of the box Typescript support
Full support for Typescript built in
Pro Good binding system
Clear, intuitive and HTML/SVG compliant binding syntax.
Default binding => value.bind
One Way binding => value.one-way
Two Way binding => value.two-way
One Time binding => value.one-time
Pro Conventions over configurations
Configured to give you the most common use cases by convention, which means you only need to change the default configuration for edge cases. This means that for normal cases far less boiler plate code has to be written.
Pro Out of the box ES6 support
Aurelia includes native support for ES6 and even comes with a Gulpfile which helps with transpiling ES6 code to ES5.
Pro Allows developers to build their application however they want
Aurelia is extremely unopinionated and was designed to be highly modular. This gives the developer the freedom to develop their application however they want, without forcing them in paradigms or rules predefined by the framework. Likewise, any of the individual components can be swapped out if so desired.
Pro Agnostic code
Pro Standards compliant
Aurelia developers always try to keep within existing and emerging Web Standards, making it easier for developers to follow best practices in web development.
Pro Easy to learn
Learning aurelia basically means learning EcmaScript and HTML, since aurelia is designed for standards compliance. Also, aurelia embraces upcoming ES language features by convention, such as ES class decorators for dependency injection, encouraging clean architecture and future-proof code.
Pro Variable binding helps with self-documenting the code
Aurelia.js consists of modules that can be used as a full framework or separately.
Pro Great documentation
One of the most crucial pieces of any new technology or framework is the documentation. At present even though Aurelia is pre-beta, the documentation is pretty complete. There are code examples missing and whatnot, but for the most part it is concise and makes the main parts of the application easy to understand.
Pro Data binding choices with sane defaults
Aurelia defaults to one-way data binding, alining with conventional wisdom. However, there are times when two-way data binding proves useful, such as binding an input widget with a view-model. Aurelia makes two-way data binding available to developers and uses it by convention when appropriate.
Pro Plays well with other frameworks
Aurelia can be used alongside of React and Polymer, since it is designed for interoperability. In practice, this means Aurelia developers can use React components by including an Aurelia custom element:
It also works well with Polymer, since they are both based on the WebComponents standards:
Pro Full commercial support
Aurelia is officially backed by Durandal Inc. and has commercial and enterprise support is available.
Pro Powerful helper CLI available
The CLI helps rapid creation of projects with generators, building, deploying and hot reloads. Webpack should be coming soon.
Pro Growing community
The Aurelia community is growing at a great pace. Still doesn’t rival the big players line Angular or React, but the answer to an Aurelia issue is a quick question away on their Discourse.
Con Small API can make it unsuitable for larger more complex projects
Mithril's small API and small number of functions while helpful for small projects and applications where speed is needed, can add another layer of complexity in larger more complex applications where a more extensive API is needed out of the box.
Con Needs more support from the community
It would be great to have a lot of plugins made by the community, or video tutorials from experiences when using it. Hopefully in the near term future.
Con No big success stories yet
There are no notable big web products build with aurelia yet
Con Two-way data binding is often considered an anti-pattern
Two-way data-binding means that a HTML element in the view and an Angular model are binded, and when one of them is changed so is the other. One-way data-binding for example does not change the model when the HTML element is changed.
This is a rather controversial subject and many developers consider two-way data binding an anti-pattern and something that is useless in complex applications because it's very easy to create complex situations by using it and being unable to debug them easily or understand what's happening by just looking at the code.