5 Benefits Of Choosing Aurelia Over AngularJS

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5 Benefits Of Choosing Aurelia Over AngularJS

A comparison of the king of JavaScript frameworks, AngularJS, and a newcomer, Aurelia.

· Web Dev Zone ·
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Angular is the most popular JavaScript framework by far (mostly after the release of Angular 2), and React is also a very impactful library that we use for many reasons.  However, other than these two, there are few good frameworks that are coming to our attention: Aurelia and Vue.js are two of them.

In our last blog post, we had a comparative discussion between Vue.js, AngularJS (1 and 2), and React.js. In this post, we are going to discuss the specific benefits of Aurelia and how it overtakes other popular frameworks in many cases.

You may also like: AngularJS vs React.js: What’s good for your business?

Brief Introduction of Aurelia:

aurelia js -logo

While Google was working on Angular 2 update, another framework called Aurelia emerged. It is a product from Blue Spire Inc. and is advertised as “the next generation UI Framework” and “the most advanced and developer friendly front-end framework today”. It has a few specific features that our team at ValueCoders found interesting and useful to our projects. Let’s start our Aurelia vs. AngularJS (2 and 1) comparison with a Routing Composition...

1) Routing and UI Composition

The advanced client-side router with dynamic route patterns, child routers, pluggable pipeline, and asynchronous screen activation. In fact, you can do dynamic, data-driven UI composition without a router.

Also, through a router-view like component, any number of routes can be handled. Here’s an example:

export class App {
configureRouter(config, router) {
title = ‘Title for App’;
                  route: [‘/routeName/’],
 name: ‘FileNameToRun’,
 moduleId: ‘PathOfFileToRun’, nav: true, title:’Title for Route’
this.router = router;

These features are also available in Angular 2. However, Angular was ideally built as a monolithic framework. All of its components were wrapped into one large bundle. This monolithic architecture made it difficult to remove components and change them when necessary.

Aurelia, on  the other hand, takes a more modern approach. While it’s a full framework, it is composed of a collection of libraries that work together using well-defined interfaces, so it’s completely modular. This means that a web app only needs to include the dependencies that it needs. Further, it means that as long as implementations adhere to the defined interface, individual components can be swapped or changed with minimal confusion.

2) MV* Approach

Aurelia follows a model-view approach like nobody else. In Aurelia,  there is no need to specify the particular controllers of view-models, the naming conventions will do that. Here is a simple example:

//“AnyFile.html”:  Any file loaded under router-view or called at the time of instantiating Aurelia App.
<!– HTML(View) and Aurelia(Model) code goes here –>
//“AnyFile.js”: Controller of the Anyfile.html view-model.
export class AnyFile {
constructor() {

Compared with Angular, you will see the difference in watching the MV* components. More precisely, the digest cycle of Angular is different from Aurelia. A big disadvantage of AngularJS, at least v1, is that it has a very steep learning curve. You will have to know its internals and the complete digest cycle pretty well, and you have to know the effect on performance while using filters and $watch expressions. Aurelia is simple and the learning curve is quite smooth.

3) Many Language Support

Aurelia’s APIs are carefully designed to be consumed naturally from both today’s and tomorrow’s most useful web programming languages. Aurelia supports ES5, ES2015, ES2016, and Typescript, which is very helpful and gives you high flexibility.

Writing web applications using ES6 is not a new thing. In fact, there are many solutions out there that can allow you to write Angular apps using ES6. However, Aurelia takes it a step further by providing support for ES6 as well as a Gulpfile with a customized build system for transpiring your ES6 down to ES5 compatible code.

4) Extensible HTML

Aurelia’s extensible HTML compiler lets you create custom HTML elements. It helps you add custom attributes to existing elements and control template generation, all with full support for data-binding, dynamic loading, and high-performance batched rendering. Here’s an example to help you out:

<div custom-attribute></div>
<!– Custom Element –>
//“ChildElement.html”: View Model for custom element
<!– Child element view model code goes here –>
“AnyParentFile.js”: Controller for AnyParentFile
export class AnyParentFile {
constructor() {

//“ChildElement.js”: Controller for ChildElement
// Module customElement
import { customElement } from ‘aurelia-framework’;
// create custom element childElement
export class ChildElement {
constructor() {

When AngularJS was developed, the standards for extending HTML was not matured. That’s why AngularJS created proprietary solutions for templating and custom elements.

Today, the web component spec defines a set of rules for both custom elements and templating. Aurelia actively adheres to these standards, supporting the HTML imports, <template> element, Shadow DOM, and native custom elements.

5) Data Binding:

Aurelia supports two types of data binding:

  1. One-way Data-Binding
  2. Two-way Data-Binding

By using adaptive techniques you can select the most efficient way to observe each property in your model and automatically synchronize your UI with best-in-class performance. Here is an example:

Two-Way Data Binding:

<!– these have the same result –>
<input value.bind=”anyValue & twoWay>
<input value.two-way=”anyValue”>

One-Way Data Binding:

<!– these have the same result –>
<input value.bind=”anyValue & oneWay>
<input value.one-way=”anyValue”>

Angular also allows two way data binding. However, for new developers, it’s not that easy to adopt the Angular way. Secondly, with a high number of filters, watches, a complex DOM structure, and so on, you will find performance issues. Some improvements are implemented later on, but they are not very effective.

On the other side, Aurelia is less complex and not difficult to learn, there is a lower chance of performance issues to implement two way data binding.

Bottom Line

Right now you must be using some popular framework like Angular or React. However, you might face difficulty when you step outside the Golden Path. On the other hand, Aurelia is built as a set of micro modules, which makes it quite flexible.

Aurelia prides itself on making almost no assumptions and providing a minimal set of conventions for ease of use, which are very easy to reconfigure or override. Hence, it depends on the project requirement and personal choice when you choose a framework. If you like fewer constraints and more freedom then Aurelia is for you.

This post was originally published on ValueCoders.

angularjs, aurelia, javascript, web dev

Published at DZone with permission of Arnab Sarkar , DZone MVB. See the original article here.

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