export class App {
message = 'Hello World!';
}.webp){kind=logo}
Ask the right questions to secure the right Aurelia talent among an increasingly shrinking pool of talent.
Aurelia is a modern, open-source JavaScript framework for web, mobile and desktop application development. It was introduced in 2015 by Rob Eisenberg, who was a part of the AngularJS development team. Aurelia stands out due to its simplicity, forward-thinking standards compliance and strong emphasis on web standards. It supports ES5, ES2015, ES2016 and many other types of compilation targets. The information about Aurelia can be found on its official website (aurelia.io) and various tech blogs such as SitePoint or InfoWorld.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
The lifecycle hooks in Aurelia include canActivate, activate, canDeactivate, deactivate, bind, unbind, attached, and detached.
To create a custom attribute in Aurelia, you would need to use the @customAttribute decorator and export a class with the same name as your attribute. The class should have a method called 'valueChanged' that will be called whenever the attribute's value changes.
One-way data binding in Aurelia allows changes in the model to update the view but not vice versa. On the other hand, two-way data binding allows changes in the model to update the view and changes in the view to update the model.
Aurelia offers a range of benefits including its simplicity, extensibility, and adherence to modern web standards. It also provides a clean and intuitive syntax, and a strong focus on web components.
You can install Aurelia using npm or yarn. For npm, use the command 'npm install aurelia-framework'. For yarn, use 'yarn add aurelia-framework'.
The world of web development is constantly evolving, so it's important that the candidate is willing to learn and adapt to new technologies and practices.
Practical experience with Aurelia is a strong indicator of the candidate's ability to use the framework effectively in a real-world setting.
Problem-solving skills are essential for any developer role, and being able to debug issues in Aurelia specifically is a key skill for this position.
This is necessary because Aurelia is a modern framework and using it effectively requires a good understanding of modern web development practices and tools.
Aurelia is built with JavaScript and TypeScript, so experience with these languages is necessary to work effectively with the framework.
This is important because Aurelia is a complex framework and understanding its core concepts is crucial for effective development.
The next 20 minutes of the interview should attempt to focus more specifically on the development questions used, and the level of depth and skill the engineer possesses.
In Aurelia, you can bind data using one-way binding, two-way binding, and event-to-method binding. One-way binding is used to bind data from the model to the view, two-way binding is used to bind data between the model and the view, and event-to-method binding is used to bind DOM events to methods in the view-model.
The 'bind' lifecycle hook in Aurelia is called when the databinding engine binds the view to the view-model. The 'attached' lifecycle hook is called after the view is attached to the DOM.
Dependency injection in Aurelia can be implemented using the @inject decorator. You can use it to annotate a class with the dependencies that it requires, and Aurelia will automatically provide them when creating an instance of the class.
The Aurelia CLI is a command line interface tool that helps with creating, developing, and testing Aurelia applications. It can generate project scaffolding, manage dependencies, run tests, and bundle your application for deployment.
Routing in Aurelia is handled by the aurelia-router module. You can define routes in the configureRouter method of your ViewModel. Each route has a name, a route pattern, and a moduleId that points to the ViewModel for that route.
At this point, a skilled Aurelia engineer should demonstrate strong knowledge of JavaScript, including ES6 and TypeScript, as these are at the core of Aurelia. They should also show experience with modern web development tools and practices. Red flags would be lack of hands-on experience or poor understanding of JavaScript, TypeScript, and web components.
export class App {
message = 'Hello World!';
}
${message}
export class App {
items = ['item1', 'item2', 'item3'];
}import {TaskQueue} from 'aurelia-framework';
export class App {
static inject = [TaskQueue];
constructor(taskQueue) {
this.taskQueue = taskQueue;
}
}export class Person {
constructor(firstName, lastName) {
this.firstName = firstName;
this.lastName = lastName;
}
get fullName() {
return `${this.firstName} ${this.lastName}`;
}
}import {computedFrom} from 'aurelia-framework';
export class App {
firstName = 'John';
lastName = 'Doe';
@computedFrom('firstName', 'lastName')
get fullName() {
return `${this.firstName} ${this.lastName}`;
}
}The final few interview questions for a Aurelia candidate should typically focus on a combination of technical skills, personal goals, growth potential, team dynamics, and company culture.
To optimize an Aurelia application for better performance, you can use techniques such as lazy loading, bundling and minification, using the @computedFrom decorator for expensive computations, and optimizing your bindings and observers.
In Aurelia, 'valueConverter' is used to create custom conversion logic that can be used in bindings, while 'bindingBehavior' is used to modify the behavior of a binding. For example, a value converter could be used to format a date, and a binding behavior could be used to throttle the updates of a two-way binding.
Internationalization in an Aurelia application can be implemented using the aurelia-i18n plugin. This plugin provides a set of APIs and conventions to translate your application's text into different languages.
The 'canActivate' lifecycle hook in Aurelia is used to determine whether a route can be activated or not. If the canActivate method returns false or a Promise that resolves to false, the navigation will be cancelled.
Form validation in Aurelia can be handled using the aurelia-validation plugin. This plugin allows you to define validation rules for your model and validate user input against these rules.
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