> For the complete documentation index, see [llms.txt](https://docs.aurelia.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.aurelia.io/introduction/essentials.md). # Essentials Aurelia is a modern JavaScript framework that empowers you to build exceptional web applications with clean, maintainable code. If you're familiar with HTML, CSS, and modern JavaScript/TypeScript, this essentials guide will introduce you to Aurelia's core concepts and get you productive quickly. This section provides a practical overview of Aurelia's fundamental building blocks. Each concept links to comprehensive documentation where you can dive deeper, but these essentials give you everything needed to start building with confidence. ## What Makes Aurelia Different Aurelia stands out by embracing web standards and keeping things simple: * **Standards-based**: Built on modern web standards without unnecessary abstractions * **Convention over configuration**: Intuitive patterns that reduce boilerplate * **Powerful templating**: Rich binding system with excellent performance * **Dependency injection**: Clean, testable architecture out of the box ## Core Concepts ### [Components](/introduction/essentials/components.md) Components are the building blocks of your Aurelia application. Learn how to create reusable UI elements with clean separation between view and view-model logic. ### [Templates](/introduction/essentials/templates.md) Aurelia's templating system provides powerful data binding, event handling, and conditional rendering with a syntax that feels natural and expressive. ### [Dependency Injection](/introduction/essentials/dependency-injection.md) Aurelia's dependency injection system promotes clean architecture by managing your application's services and their dependencies automatically. ### [Reactivity](/introduction/essentials/reactivity.md) Understand how Aurelia's observation system automatically tracks changes and updates your UI efficiently without virtual DOM overhead. ## Next Steps Ready to build something? Try our [Quick Start Guide](/getting-started/quick-start-guide.md) to create your first Aurelia application. For comprehensive coverage of all features, explore the full documentation sections on [Templates](/templates/overview.md), [Components](/components/components.md), and [Getting to Know Aurelia](https://github.com/aurelia/aurelia/blob/master/docs/user-docs/getting-to-know-aurelia/introduction/README.md). The [Tutorials](https://github.com/aurelia/aurelia/blob/master/docs/user-docs/tutorials/README.md) section contains step-by-step guides for building real applications, while [Developer Guides](https://github.com/aurelia/aurelia/blob/master/docs/user-docs/developer-guides/README.md) covers advanced topics and best practices. --- # Agent Instructions This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com. ## Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter: ``` GET https://docs.aurelia.io/introduction/essentials.md?ask=&goal= ``` `ask` is the immediate question: it should be specific, self-contained, and written in natural language. `goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.