Ember Polaris vs Aurelia 2: A Comprehensive Comparison

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In the world of frontend development, Ember Polaris and Aurelia 2 represent two different philosophies for building web applications. While Ember Polaris brings modern features to the Ember ecosystem with Glimmer components and strict-mode JavaScript, Aurelia 2 offers a powerful, convention-based approach with modern features. Let’s explore their differences and use cases.

Table of Contents

  1. Core Concepts
  2. Reactivity and State Management
  3. Templating and Components
  4. DOM Manipulation
  5. Event Handling
  6. Component Composition
  7. Form Handling
  8. Lifecycle Management
  9. Performance and Bundle Size
  10. Learning Curve
  11. Conclusion

Core Concepts

Ember Polaris and Aurelia 2 take fundamentally different approaches to building web applications:

  • Ember Polaris uses a modern, class-based component model with Glimmer templates and strict-mode JavaScript
  • Aurelia 2 uses a convention-based approach with powerful data binding and dependency injection

Reactivity and State Management

State Declaration

Both frameworks offer different ways to declare and manage state:

Ember Polaris’s Approach

// name.gjs
import Component from "@glimmer/component";

export default class NameComponent extends Component {
  name = "John";

  <template>
    <h1>Hello {{this.name}}</h1>
  </template>
}

Ember Polaris uses class-based components with template syntax.

Aurelia 2’s Approach

<!-- name.html -->
<h1>Hello ${name}</h1>
// name.ts
export class NameCustomElement {
  name = "John";
}

Aurelia 2 uses convention-based components with automatic data binding.

State Updates

Ember Polaris’s Approach

// name.gjs
import Component from "@glimmer/component";
import { tracked } from "@glimmer/tracking";

export default class CounterComponent extends Component {
  @tracked name = "John";

  constructor(owner, args) {
    super(owner, args);
    this.name = "Jane";
  }

  <template>
    <h1>Hello {{this.name}}</h1>
  </template>
}

Aurelia 2’s Approach

<!-- name.html -->
<h1>Hello ${name}</h1>
// name.ts
export class NameCustomElement {
  name = "John";

  constructor() {
    this.name = "Jane";
  }
}

Computed Properties

Ember Polaris’s Approach

// double-count.gjs
import Component, { tracked } from "@glimmer/component";

export default class DoubleCount extends Component {
  @tracked count = 10;

  get doubleCount() {
    return this.count * 2;
  }

  <template>
    <div>{{this.doubleCount}}</div>
  </template>
}

Aurelia 2’s Approach

<!-- double-count.html -->
<div>${doubleCount}</div>
// double-count.ts
export class DoubleCountCustomElement {
  count = 10;

  get doubleCount() {
    return this.count * 2;
  }
}

DOM Manipulation

List Rendering

Ember Polaris’s Approach

// colors.gjs
const colors = ["red", "green", "blue"];

<template>
  <ul>
    {{#each colors as |color|}}
      <li>{{color}}</li>
    {{/each}}
  </ul>
</template>

Aurelia 2’s Approach

<!-- colors.html -->
<ul>
  <li repeat.for="color of colors">${color}</li>
</ul>

Event Handling

Ember Polaris’s Approach

// counter.gjs
import Component from "@glimmer/component";
import { tracked } from "@glimmer/tracking";
import { on } from "@ember/modifier";

export default class Counter extends Component {
  @tracked count = 0;

  incrementCount = () => this.count++;

  <template>
    <p>Counter: {{this.count}}</p>
    <button {{on "click" this.incrementCount}}>+1</button>
  </template>
}

Aurelia 2’s Approach

<!-- counter.html -->
<p>Counter: ${count}</p>
<button click.trigger="incrementCount">+1</button>

Form Handling

Text Input

Ember Polaris’s Approach

// input-hello.gjs
import Component from "@glimmer/component";
import { tracked } from "@glimmer/tracking";
import { on } from '@ember/modifier';

export default class InputHello extends Component {
  @tracked text = "Hello World";

  handleInput = (event) => (this.text = event.target.value);

  <template>
    <p>{{this.text}}</p>
    <input value={{this.text}} {{on "input" this.handleInput}} />
  </template>
}

Aurelia 2’s Approach

<!-- input-hello.html -->
<p>${text}</p>
<input value.bind />

Performance and Bundle Size

Ember Polaris

  • Modern build pipeline
  • Glimmer VM for efficient rendering
  • Tree shaking support
  • Optimized for large applications

Aurelia 2

  • Modern build pipeline
  • Efficient data binding
  • Convention over configuration
  • Optimized for performance

Learning Curve

Ember Polaris

  • Steeper learning curve
  • Class-based components
  • Strong conventions
  • Rich ecosystem to learn
  • Modern JavaScript features

Aurelia 2

  • Moderate learning curve
  • Convention-based approach
  • Modern JavaScript features
  • Build tools required
  • Rich ecosystem to learn

Conclusion

Choose Ember Polaris if you:

  • Need a full-featured enterprise framework
  • Value strong conventions
  • Want modern class-based components
  • Are building large-scale applications
  • Need robust tooling support
  • Plan to scale your application significantly

Choose Aurelia 2 if you:

  • Value convention over configuration
  • Want powerful data binding
  • Need dependency injection
  • Are building large applications
  • Want modern features
  • Need a complete ecosystem

Both frameworks excel in different scenarios:

  • Ember Polaris shines in building large-scale applications that benefit from strong conventions and modern features
  • Aurelia 2 excels in building applications that benefit from convention-based development and powerful data binding

The choice between Ember Polaris and Aurelia 2 often depends on your project’s requirements:

  • Use Ember Polaris for building complex enterprise applications that benefit from strong conventions
  • Use Aurelia 2 for building applications that need powerful data binding and convention-based development





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