Learn Ember-js - 9 Code Examples & CST Typing Practice Test

Ember.js is a mature, full-featured JavaScript framework for building ambitious web applications. It emphasizes convention over configuration, strong defaults, and long-term stability.

View all 9 Ember-js code examples →

Ember.js Basic Counter Ember.js Step Counter Ember.js Max Limit Counter Ember.js Auto-Reset Counter Ember.js Counter with History Ember.js Dark Mode Only Counter Ember.js Auto-Increment Counter Ember.js Conditional Theme Counter Ember.js Full Featured Counter

Learn EMBER-JS with Real Code Examples

Updated Nov 21, 2025

Explain

Ember provides a highly opinionated architecture for scalable web apps.

It offers built-in routing, data layer, and CLI tooling out of the box.

Ember focuses on productivity with conventions that eliminate boilerplate and decision fatigue.

Core Features

Route-driven architecture

Components with Glimmer syntax

Services for shared logic

Ember Data for models and relationships

Computed properties and tracked state

Basic Concepts Overview

Routes and templates

Glimmer components

Tracked properties

Services for cross-app logic

Models and Ember Data relationships

Project Structure

app/routes - route handlers

app/templates - templates for routes

app/components - UI components

app/models - data structures

config/environment.js - environment config

Building Workflow

Generate files using Ember CLI blueprints

Use routes to structure UI and data flow

Create reusable components

Manage state using Ember Data

Run and test with built-in commands

Difficulty Use Cases

Beginner: simple components and routes

Intermediate: nested routing and services

Advanced: Ember Data customization

Expert: engines, addons, large-scale architecture

Community: contributing to Ember ecosystem

Comparisons

More opinionated than React or Vue

Better conventions for large teams

Similar stability philosophy to Rails

Slower adoption compared to modern micro-libraries

Deep tooling support via Ember CLI

Versioning Timeline

2011 - Ember initial release

2015 - Ember 2.0 with new conventions

2017 - Glimmer rendering engine introduced

2020 - Modern Octane edition released

2025 - Continued incremental improvements with Ember Octane

Glossary

Route: Defines UI and data for a URL

Template: Handlebars markup

Glimmer Component: Lightweight UI unit

Service: Singleton for shared logic

Model: Data structure managed by Ember Data

Code Sample Descriptions

Ember.js Basic Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class CounterComponent extends Component {
    @tracked count = 0;
    @tracked isDark = false;

    @action increment() { this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <div>
        <button {{on 'click' this.increment}}>+</button>
        <button {{on 'click' this.decrement}}>-</button>
        <button {{on 'click' this.reset}}>Reset</button>
    </div>
    <button {{on 'click' this.toggleTheme}}>Switch Theme</button>
</div>

Basic Ember.js counter with dark/light theme toggle.

Let’s Try →

Ember.js Step Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class StepCounterComponent extends Component {
    @tracked count = 0;
    @tracked step = 2;

    @action increment() { this.count += this.step; }
    @action decrement() { this.count -= this.step; }
    @action reset() { this.count = 0; }
}

<!-- step-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Counter increments/decrements by a step value.

Let’s Try →

Ember.js Max Limit Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class MaxCounterComponent extends Component {
    @tracked count = 0;
    max = 5;

    @action increment() { if(this.count < this.max) this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- max-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Stops incrementing after reaching a maximum value.

Let’s Try →

Ember.js Auto-Reset Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class AutoResetCounterComponent extends Component {
    @tracked count = 0;
    threshold = 10;

    @action increment() {
        this.count = (this.count + 1 > this.threshold ? 0 : this.count + 1);
    }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- auto-reset-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Automatically resets when counter exceeds a threshold.

Let’s Try →

Ember.js Counter with History

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class HistoryCounterComponent extends Component {
    @tracked count = 0;
    @tracked history = [];

    @action increment() { this.count++; this.history = [...this.history, 'Increment']; }
    @action decrement() { this.count--; this.history = [...this.history, 'Decrement']; }
    @action reset() { this.count = 0; this.history = [...this.history, 'Reset']; }
}

<!-- history-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<div>History: {{this.history}}</div>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Tracks increment/decrement actions in a history array.

Let’s Try →

Ember.js Dark Mode Only Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class DarkCounterComponent extends Component {
    @tracked isDark = false;
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- dark-counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: 0</h2>
    <button {{on 'click' this.toggleTheme}}>Toggle Theme</button>
</div>

Static counter with only theme toggle.

Let’s Try →

Ember.js Auto-Increment Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

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

    constructor() {
        super(...arguments);
        setInterval(() => { this.count++; }, 1000);
    }
}

<!-- auto-increment-counter.hbs -->
<h2>Counter: {{this.count}}</h2>

Automatically increments counter every second.

Let’s Try →

Ember.js Conditional Theme Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class ConditionalThemeCounterComponent extends Component {
    @tracked count = 0;
    @action increment() { this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- conditional-theme-counter.hbs -->
<div class={{if (even this.count) 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <button {{on 'click' this.increment}}>+</button>
    <button {{on 'click' this.decrement}}>-</button>
    <button {{on 'click' this.reset}}>Reset</button>
</div>

Theme changes based on even/odd counter value.

Let’s Try →

Ember.js Full Featured Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class FullCounterComponent extends Component {
    @tracked count = 0;
    @tracked history = [];
    @tracked isDark = false;
    step = 2;
    max = 10;

    constructor() {
        super(...arguments);
        setInterval(() => {
        let n = this.count + this.step;
        if(n > this.max) n = 0;
        this.count = n;
        this.history = [...this.history, 'Auto Increment'];
        }, 1000);
    }

    @action increment() { let n = this.count + this.step; if(n>this.max)n=0; this.count=n; this.history = [...this.history,'Increment']; }
    @action decrement() { this.count -= this.step; this.history = [...this.history,'Decrement']; }
    @action reset() { this.count = 0; this.history = [...this.history,'Reset']; }
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- full-counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <div>History: {{this.history}}</div>
    <button {{on 'click' this.increment}}>+</button>
    <button {{on 'click' this.decrement}}>-</button>
    <button {{on 'click' this.reset}}>Reset</button>
    <button {{on 'click' this.toggleTheme}}>Toggle Theme</button>
</div>

Combines step, max, auto-reset, history, auto-increment, and theme toggle.

Let’s Try →

Frequently Asked Questions about Ember-js

What is Ember-js?

Ember.js is a mature, full-featured JavaScript framework for building ambitious web applications. It emphasizes convention over configuration, strong defaults, and long-term stability.

What are the primary use cases for Ember-js?

Large-scale web applications. Dashboard-heavy SPAs. Complex CRUD enterprise systems. Apps requiring long-term maintainability. Teams needing strong conventions and stability

What are the strengths of Ember-js?

Highly stable, backward-compatible framework. Clear and enforced conventions. Robust toolchain and project structure. Ideal for large teams and long-term projects. Glimmer engine provides fast rendering

What are the limitations of Ember-js?

Steeper learning curve due to conventions. Less popular compared to React/Vue. Heavier than micro-frameworks. Less flexibility for unstructured projects. Ecosystem smaller than React or Vue

How can I practice Ember-js typing speed?

CodeSpeedTest offers 9+ real Ember-js code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Other Programming Languages

C React Python C++Rust TypeScript Kotlin PHP Java C#Ruby Mql Cql N1ql Cypher Gremlin Partiql Haskell Elixir Fsharp View all languages →

Code Sample Descriptions

Ember.js Basic Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class CounterComponent extends Component {
    @tracked count = 0;
    @tracked isDark = false;

    @action increment() { this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <div>
        <button {{on 'click' this.increment}}>+</button>
        <button {{on 'click' this.decrement}}>-</button>
        <button {{on 'click' this.reset}}>Reset</button>
    </div>
    <button {{on 'click' this.toggleTheme}}>Switch Theme</button>
</div>

Basic Ember.js counter with dark/light theme toggle.

Let’s Try →

Ember.js Step Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class StepCounterComponent extends Component {
    @tracked count = 0;
    @tracked step = 2;

    @action increment() { this.count += this.step; }
    @action decrement() { this.count -= this.step; }
    @action reset() { this.count = 0; }
}

<!-- step-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Counter increments/decrements by a step value.

Let’s Try →

Ember.js Max Limit Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class MaxCounterComponent extends Component {
    @tracked count = 0;
    max = 5;

    @action increment() { if(this.count < this.max) this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- max-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Stops incrementing after reaching a maximum value.

Let’s Try →

Ember.js Auto-Reset Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class AutoResetCounterComponent extends Component {
    @tracked count = 0;
    threshold = 10;

    @action increment() {
        this.count = (this.count + 1 > this.threshold ? 0 : this.count + 1);
    }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- auto-reset-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Automatically resets when counter exceeds a threshold.

Let’s Try →

Ember.js Counter with History

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class HistoryCounterComponent extends Component {
    @tracked count = 0;
    @tracked history = [];

    @action increment() { this.count++; this.history = [...this.history, 'Increment']; }
    @action decrement() { this.count--; this.history = [...this.history, 'Decrement']; }
    @action reset() { this.count = 0; this.history = [...this.history, 'Reset']; }
}

<!-- history-counter.hbs -->
<h2>Counter: {{this.count}}</h2>
<div>History: {{this.history}}</div>
<button {{on 'click' this.increment}}>+</button>
<button {{on 'click' this.decrement}}>-</button>
<button {{on 'click' this.reset}}>Reset</button>

Tracks increment/decrement actions in a history array.

Let’s Try →

Ember.js Dark Mode Only Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class DarkCounterComponent extends Component {
    @tracked isDark = false;
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- dark-counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: 0</h2>
    <button {{on 'click' this.toggleTheme}}>Toggle Theme</button>
</div>

Static counter with only theme toggle.

Let’s Try →

Ember.js Auto-Increment Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

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

    constructor() {
        super(...arguments);
        setInterval(() => { this.count++; }, 1000);
    }
}

<!-- auto-increment-counter.hbs -->
<h2>Counter: {{this.count}}</h2>

Automatically increments counter every second.

Let’s Try →

Ember.js Conditional Theme Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class ConditionalThemeCounterComponent extends Component {
    @tracked count = 0;
    @action increment() { this.count++; }
    @action decrement() { this.count--; }
    @action reset() { this.count = 0; }
}

<!-- conditional-theme-counter.hbs -->
<div class={{if (even this.count) 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <button {{on 'click' this.increment}}>+</button>
    <button {{on 'click' this.decrement}}>-</button>
    <button {{on 'click' this.reset}}>Reset</button>
</div>

Theme changes based on even/odd counter value.

Let’s Try →

Ember.js Full Featured Counter

import Component from '@glimmer/component';
import { tracked } from '@glimmer/tracking';
import { action } from '@ember/object';

export default class FullCounterComponent extends Component {
    @tracked count = 0;
    @tracked history = [];
    @tracked isDark = false;
    step = 2;
    max = 10;

    constructor() {
        super(...arguments);
        setInterval(() => {
        let n = this.count + this.step;
        if(n > this.max) n = 0;
        this.count = n;
        this.history = [...this.history, 'Auto Increment'];
        }, 1000);
    }

    @action increment() { let n = this.count + this.step; if(n>this.max)n=0; this.count=n; this.history = [...this.history,'Increment']; }
    @action decrement() { this.count -= this.step; this.history = [...this.history,'Decrement']; }
    @action reset() { this.count = 0; this.history = [...this.history,'Reset']; }
    @action toggleTheme() { this.isDark = !this.isDark; }
}

<!-- full-counter.hbs -->
<div class={{if this.isDark 'dark-theme' 'light-theme'}}>
    <h2>Counter: {{this.count}}</h2>
    <div>History: {{this.history}}</div>
    <button {{on 'click' this.increment}}>+</button>
    <button {{on 'click' this.decrement}}>-</button>
    <button {{on 'click' this.reset}}>Reset</button>
    <button {{on 'click' this.toggleTheme}}>Toggle Theme</button>
</div>

Combines step, max, auto-reset, history, auto-increment, and theme toggle.

Let’s Try →

Frequently Asked Questions about Ember-js

What is Ember-js?

Ember.js is a mature, full-featured JavaScript framework for building ambitious web applications. It emphasizes convention over configuration, strong defaults, and long-term stability.

What are the primary use cases for Ember-js?

Large-scale web applications. Dashboard-heavy SPAs. Complex CRUD enterprise systems. Apps requiring long-term maintainability. Teams needing strong conventions and stability

What are the strengths of Ember-js?

What are the limitations of Ember-js?

Steeper learning curve due to conventions. Less popular compared to React/Vue. Heavier than micro-frameworks. Less flexibility for unstructured projects. Ecosystem smaller than React or Vue

How can I practice Ember-js typing speed?

CodeSpeedTest offers 9+ real Ember-js code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

Learn Ember-js - 9 Code Examples & CST Typing Practice Test

Learn EMBER-JS with Real Code Examples

Explain

Core Features

Basic Concepts Overview

Project Structure

Building Workflow

Difficulty Use Cases

Comparisons

Versioning Timeline

Glossary

Installation Setup

Environment Setup

Config Files

Cli Commands

Internationalization

Accessibility

Ui Styling

State Management

Data Management

Architecture

Rendering Model

Architectural Patterns

Real World Architectures

Design Principles

Scalability Guide

Migration Guide

Performance Notes

Security Notes

Monitoring Analytics

Code Quality

Practical Examples

Troubleshooting

Testing Guide

Deployment Options

Tools Ecosystem

Integrations

Productivity Tips

Challenges

Learning Path

Skill Improvement Plan

Interview Questions

Cheat Sheet

Books

Tutorials

Official Docs

Community Links

Community Support

Monetization

Future Roadmap

When Not To Use

Final Summary

Faq

Code Sample Descriptions

Ember.js Basic Counter

Ember.js Step Counter

Ember.js Max Limit Counter

Ember.js Auto-Reset Counter

Ember.js Counter with History

Ember.js Dark Mode Only Counter

Ember.js Auto-Increment Counter

Ember.js Conditional Theme Counter

Ember.js Full Featured Counter

Frequently Asked Questions about Ember-js

What is Ember-js?

What are the primary use cases for Ember-js?

What are the strengths of Ember-js?

What are the limitations of Ember-js?

How can I practice Ember-js typing speed?

Learn Other Programming Languages

Learn Ember-js - 9 Code Examples & CST Typing Practice Test

Learn EMBER-JS with Real Code Examples

Explain

Core Features

Basic Concepts Overview

Project Structure

Building Workflow

Difficulty Use Cases

Comparisons

Versioning Timeline