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class="document-toc-link" href="#summary">Summary</a></li></ul></section></div></div><div class="sidebar-body"><ol><li class="section"><a href="/en-US/docs/Learn_web_development/Getting_started">Getting started modules</a></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup">Environment setup</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Installing_software">Installing basic software</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Browsing_the_web">Browsing the web</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Code_editors">Code editors</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Dealing_with_files">Dealing with files</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Command_line">Command line crash course</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website">Your first website</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website/What_will_your_website_look_like">What will your website look like?</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Creating_the_content">HTML: Creating the content</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Styling_the_content">CSS: Styling the content</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Adding_interactivity">JavaScript: Adding interactivity</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Publishing_your_website">Publishing your website</a></li></ol></details></li><li class="toggle"><details><summary><a 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href="/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Workflows_and_processes">Workflows and processes</a></li><li><a href="/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Job_interviews">Succeeding in job interviews</a></li></ol></details></li><li class="section"><a href="/en-US/docs/Learn_web_development/Core">Core modules</a></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Structuring_content">Structuring content with HTML</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Basic_HTML_syntax">Basic HTML syntax</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Webpage_metadata">What's in the head? Webpage metadata</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Headings_and_paragraphs">Headings and paragraphs in HTML</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Emphasis_and_importance">Emphasis and importance</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Lists">Lists</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_documents">Structuring documents</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Advanced_text_features">Advanced text features</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Creating_links">Creating links</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Marking_up_a_letter">Challenge: Marking up a letter</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_a_page_of_content">Challenge: Structuring a page of content</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_images">HTML images</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_video_and_audio">HTML video and audio</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Mozilla_splash_page">Challenge: Mozilla splash page</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_table_basics">HTML table basics</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Table_accessibility">HTML table accessibility</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Planet_data_table">Challenge: Structuring a planet data table</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_forms">Forms and buttons in HTML</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Structuring_content/Debugging_HTML">Debugging HTML</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Styling_basics">CSS styling basics</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/What_is_CSS">What is CSS?</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Getting_started">Getting started with CSS</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Styling_a_bio_page">Challenge: Styling a biography page</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Basic_selectors">Basic CSS selectors</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Attribute_selectors">Attribute selectors</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Pseudo_classes_and_elements">Pseudo-classes and pseudo-elements</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Combinators">Combinators</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Box_model">The box model</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Handling_conflicts">Handling conflicts</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Values_and_units">CSS values and units</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Sizing">Sizing items in CSS</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Backgrounds_and_borders">Backgrounds and borders</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Overflow">Overflowing content</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Images_media_forms">Images, media, and form elements</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Tables">Styling tables</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Debugging_CSS">Debugging CSS</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Fundamental_CSS_comprehension">Challenge: Fundamental CSS comprehension</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Fancy_letterheaded_paper">Challenge: Creating fancy letterheaded paper</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Styling_basics/Cool-looking_box">Challenge: A cool-looking box</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Text_styling">CSS text styling</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Text_styling/Fundamentals">Fundamental text and font styling</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Text_styling/Styling_lists">Styling lists</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Text_styling/Styling_links">Styling links</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Text_styling/Web_fonts">Web fonts</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Text_styling/Typesetting_a_homepage">Challenge: Typesetting a community school homepage</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/CSS_layout">CSS layout</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Introduction">Introduction to CSS layout</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Floats">Floats</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Positioning">Positioning</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Flexbox">Flexbox</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Grids">CSS grid layout</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Responsive_Design">Responsive design</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Media_queries">Media query fundamentals</a></li><li><a href="/en-US/docs/Learn_web_development/Core/CSS_layout/Fundamental_Layout_Comprehension">Challenge: Fundamental layout comprehension</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Scripting">Dynamic scripting with JavaScript</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/What_is_JavaScript">What is JavaScript?</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/A_first_splash">A first splash into JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/What_went_wrong">What went wrong? Troubleshooting JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Variables">Storing the information you need — Variables</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Math">Basic math in JavaScript — numbers and operators</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Strings">Handling text — strings in JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Useful_string_methods">Useful string methods</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Arrays">Arrays</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Silly_story_generator">Challenge: Silly story generator</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Conditionals">Making decisions in your code — conditionals</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Loops">Looping code</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Functions">Functions — reusable blocks of code</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Build_your_own_function">Build your own function</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Return_values">Function return values</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Events">Introduction to events</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Event_bubbling">Event bubbling</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Image_gallery">Challenge: Image gallery</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Object_basics">JavaScript object basics</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/DOM_scripting">DOM scripting introduction</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Network_requests">Making network requests with JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/JSON">Working with JSON</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Scripting/Debugging_JavaScript">Debugging JavaScript and handling errors</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries">JavaScript frameworks and libraries</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Introduction">Introduction to client-side frameworks</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Main_features">Framework main features</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_getting_started">Getting started with React</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_todo_list_beginning">Beginning our React todo list</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_components">Componentizing our React app</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_events_state">React interactivity: Events and state</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_filtering_conditional_rendering">React interactivity: Editing, filtering, conditional rendering</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_accessibility">Accessibility in React</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_resources">React resources</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Core/Accessibility">Accessibility</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/What_is_accessibility">What is accessibility?</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/Tooling">Accessibility tooling and assistive technology</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/HTML">HTML: A good basis for accessibility</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/CSS_and_JavaScript">CSS and JavaScript accessibility best practices</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/WAI-ARIA_basics">WAI-ARIA basics</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/Multimedia">Accessible multimedia</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/Mobile">Mobile accessibility</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Accessibility/Accessibility_troubleshooting">Challenge: Accessibility troubleshooting</a></li></ol></details></li><li><a href="/en-US/docs/Learn_web_development/Core/Design_for_developers">Design for developers</a></li><li><a href="/en-US/docs/Learn_web_development/Core/Version_control">Version control</a></li><li class="section"><a href="/en-US/docs/Learn_web_development/Extensions">Extension modules</a></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects">Advanced JavaScript objects</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_prototypes">Object prototypes</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object-oriented_programming">Object-oriented programming</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Classes_in_JavaScript">Classes in JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_building_practice">Object building practice</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Adding_bouncing_balls_features">Challenge: Adding features to our bouncing balls demo</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs">Client-side web APIs</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Introduction">Introduction to web APIs</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Video_and_audio_APIs">Video and Audio APIs</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Drawing_graphics">Drawing graphics</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Client-side_storage">Client-side storage</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Third_party_APIs">Third-party APIs</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS">Asynchronous JavaScript</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing">Introducing asynchronous JavaScript</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS/Promises">How to use promises</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS/Implementing_a_promise-based_API">How to implement a promise-based API</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing_workers">Introducing workers</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Async_JS/Sequencing_animations">Challenge: Sequencing animations</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Forms">Web forms</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Your_first_form">Your first form</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/How_to_structure_a_web_form">How to structure a web form</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Basic_native_form_controls">Basic native form controls</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/HTML5_input_types">The HTML5 input types</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Other_form_controls">Other form controls</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Styling_web_forms">Styling web forms</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Advanced_form_styling">Advanced form styling</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/UI_pseudo-classes">UI pseudo-classes</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Forms/Form_validation">Client-side form validation</a></li><li><a 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list and detail views</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Sessions">Django Tutorial Part 7: Sessions framework</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Authentication">Django Tutorial Part 8: User authentication and permissions</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Forms">Django Tutorial Part 9: Working with forms</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Testing">Django Tutorial Part 10: Testing a Django web application</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Deployment">Django Tutorial Part 11: Deploying Django to production</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/web_application_security">Django web application security</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Django/django_assessment_blog">Assessment: DIY Django mini blog</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs">Express web framework (Node.js)</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/Introduction">Express/Node introduction</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/development_environment">Setting up a Node development environment</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/Tutorial_local_library_website">Express Tutorial: The Local Library website</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/skeleton_website">Express Tutorial Part 2: Creating a skeleton website</a></li><li><a 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href="/en-US/docs/Learn_web_development/Extensions/Performance/CSS">CSS performance optimization</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Performance/business_case_for_performance">The business case for web performance</a></li></ol></details></li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Extensions/Testing">Testing</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/Introduction">Introduction to cross-browser testing</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/Testing_strategies">Strategies for carrying out testing</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/HTML_and_CSS">Handling common HTML and CSS problems</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/Feature_detection">Implementing feature detection</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/Automated_testing">Introduction to automated testing</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Testing/Your_own_automation_environment">Setting up your own test automation environment</a></li></ol></details></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Transform_animate">Transform and animate CSS</a></li><li><a href="/en-US/docs/Learn_web_development/Extensions/Security_privacy">Security and privacy</a></li><li class="section">Further resources</li><li class="toggle"><details><summary><a href="/en-US/docs/Learn_web_development/Howto">How to solve common problems</a></summary><ol><li><a href="/en-US/docs/Learn_web_development/Howto/Solve_HTML_problems">Solve common HTML problems</a></li><li><a href="/en-US/docs/Learn_web_development/Howto/Solve_CSS_problems">Solve common CSS problems</a></li><li><a href="/en-US/docs/Learn_web_development/Howto/Solve_JavaScript_problems">Solve common JavaScript problems</a></li><li><a href="/en-US/docs/Learn_web_development/Howto/Web_mechanics">Web mechanics</a></li><li><a href="/en-US/docs/Learn_web_development/Howto/Tools_and_setup">Tools and setup</a></li><li><a href="/en-US/docs/Learn_web_development/Howto/Design_and_accessibility">Design and accessibility</a></li></ol></details></li><li><a href="/en-US/docs/Learn_web_development/About">About</a></li><li><a href="/en-US/docs/Learn_web_development/Educators">Resources for educators</a></li><li><a href="/en-US/docs/Learn_web_development/Changelog">Changelog</a></li></ol></div></div><section class="place side"></section></nav></aside><div class="toc-container"><aside class="toc"><nav><div class="document-toc-container"><section class="document-toc"><header><h2 class="document-toc-heading">In this article</h2></header><ul class="document-toc-list"><li class="document-toc-item "><a class="document-toc-link" href="#planning_out_the_layout_of_the_todomvc_app">Planning out the layout of the TodoMVC app</a></li><li class="document-toc-item "><a class="document-toc-link" href="#using_the_cli_to_create_our_components_for_us">Using the CLI to create our components for us</a></li><li class="document-toc-item "><a class="document-toc-link" href="#summary">Summary</a></li></ul></section></div></nav></aside><section class="place side"></section></div></div><main id="content" class="main-content "><article class="main-page-content" lang="en-US"><header><h1>Ember app structure and componentization</h1></header><div class="section-content"><ul class="prev-next"><li><a class="button secondary" href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_getting_started"><span class="button-wrap"> Previous </span></a></li><li><a class="button secondary" href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries"><span class="button-wrap"> Overview: JavaScript frameworks and libraries</span></a></li><li><a class="button secondary" href="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_interactivity_events_state"><span class="button-wrap"> Next </span></a></li></ul> <p>In this article we'll get right on with planning out the structure of our TodoMVC Ember app, adding in the HTML for it, and then breaking that HTML structure into components.</p> <figure class="table-container"><table> <tbody> <tr> <th scope="row">Prerequisites:</th> <td> <p> At minimum, it is recommended that you are familiar with the core <a href="/en-US/docs/Learn_web_development/Core/Structuring_content">HTML</a>, <a href="/en-US/docs/Learn_web_development/Core/Styling_basics">CSS</a>, and <a href="/en-US/docs/Learn_web_development/Core/Scripting">JavaScript</a> languages, and have knowledge of the <a href="/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Command_line">terminal/command line</a>. </p> <p> A deeper understanding of modern JavaScript features (such as classes, modules, etc.), will be extremely beneficial, as Ember makes heavy use of them. </p> </td> </tr> <tr> <th scope="row">Objective:</th> <td> To learn how to structure an Ember app, and then break that structure into components. </td> </tr> </tbody> </table></figure></div><section aria-labelledby="planning_out_the_layout_of_the_todomvc_app"><h2 id="planning_out_the_layout_of_the_todomvc_app"><a href="#planning_out_the_layout_of_the_todomvc_app">Planning out the layout of the TodoMVC app</a></h2><div class="section-content"><p>In the last article we set up a new Ember project, then added and configured our CSS styles. At this point we add some HTML, planning out the structure and semantics of our TodoMVC app.</p> <p>The landing page HTML of our application is defined in <code>app/templates/application.hbs</code>. This already exists, and its contents currently look like so:</p> <div class="code-example"><div class="example-header"><span class="language-name">hbs</span></div><pre class="brush: hbs notranslate"><code>{{!-- The following component displays Ember's default welcome message. --}} <WelcomePage /> {{!-- Feel free to remove this! --}} {{outlet}} </code></pre></div> <p><code><WelcomePage /></code> is a component provided by an Ember addon that renders the default welcome page we saw in the previous article, when we first navigated to our server at <code>localhost:4200</code>.</p> <p>However, we don't want this. Instead, we want it to contain the TodoMVC app structure. To start with, delete the contents of <code>application.hbs</code> and replace them with the following:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><section class="todoapp"> <h1>todos</h1> <input class="new-todo" aria-label="What needs to be done?" placeholder="What needs to be done?" autofocus /> </section> </code></pre></div> <div class="notecard note"> <p><strong>Note:</strong> <a href="/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-label"><code>aria-label</code></a> provides a label for assistive technology to make use of — for example, for a screen reader to read out. This is useful in such cases where we have an <a href="/en-US/docs/Web/HTML/Element/input"><code><input></code></a> being used with no corresponding HTML text that could be turned into a label.</p> </div> <p>When you save <code>application.hbs</code>, the development server you started earlier will automatically rebuild the app and refresh the browser. The rendered output should now look like this:</p> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-initial-render.png" alt="todo app rendered in the browser with only the new todo input field showing" width="741" height="684" loading="lazy"></p> <p>It doesn't take too much effort to get our HTML looking like a fully-featured to-do list app. Update the <code>application.hbs</code> file again so its content looks like this:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><section class="todoapp"> <h1>todos</h1> <input class="new-todo" aria-label="What needs to be done?" placeholder="What needs to be done?" autofocus /> <section class="main"> <input id="mark-all-complete" class="toggle-all" type="checkbox" /> <label for="mark-all-complete">Mark all as complete</label> <ul class="todo-list"> <li> <div class="view"> <input aria-label="Toggle the completion of this todo" class="toggle" type="checkbox" /> <label>Buy Movie Tickets</label> <button type="button" class="destroy" title="Remove this todo"></button> </div> <input autofocus class="edit" value="Todo Text" /> </li> <li> <div class="view"> <input aria-label="Toggle the completion of this todo" class="toggle" type="checkbox" /> <label>Go to Movie</label> <button type="button" class="destroy" title="Remove this todo"></button> </div> <input autofocus class="edit" value="Todo Text" /> </li> </ul> </section> <footer class="footer"> <span class="todo-count"> <strong>0</strong> todos left </span> <ul class="filters"> <li> <a href="#">All</a> <a href="#">Active</a> <a href="#">Completed</a> </li> </ul> <button type="button" class="clear-completed">Clear Completed</button> </footer> </section> </code></pre></div> <p>The rendered output should now be as follows:</p> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-with-todo-items.png" alt="todo app rendered in the browser with new todo input field and existing todos showing, - buy movie tickets and go to movie" width="741" height="684" loading="lazy"></p> <p>This looks pretty complete, but remember that this is only a static prototype. Now we need to break up our HTML code into dynamic components; later we'll turn it into a fully interactive app.</p> <p>Looking at the code next to the rendered todo app, there are a number of ways we could decide how to break up the UI, but let's plan on splitting the HTML out into the following components:</p> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-ui-component-breakdown.png" alt="code screenshot annotated to show what parts of the code will go into which component" width="1393" height="1096" loading="lazy"></p> <p>The component groupings are as follows:</p> <ul> <li> <p>The main input / "new-todo" (red in the image)</p> </li> <li> <p>The containing body of the todo list + the <code>mark-all-complete</code> button (purple in the image)</p> <ul> <li>The <code>mark-all-complete button</code>, explicitly highlighted for reasons given below (yellow in the image)</li> <li>Each todo is an individual component (green in the image)</li> </ul> </li> <li> <p>The footer (blue in the image)</p> </li> </ul> <p>Something odd to note is that the <code>mark-all-complete</code> checkbox (marked in yellow), while in the "main" section, is rendered next to the "new-todo" input. This is because the default CSS absolutely positions the checkbox + label with negative top and left values to move it next to the input, rather than it being inside the "main" section.</p> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-devtools-view.png" alt="todo app looked at through devtools" width="1125" height="1005" loading="lazy"></p></div></section><section aria-labelledby="using_the_cli_to_create_our_components_for_us"><h2 id="using_the_cli_to_create_our_components_for_us"><a href="#using_the_cli_to_create_our_components_for_us">Using the CLI to create our components for us</a></h2><div class="section-content"><p>So to represent our app, we want to create 4 components:</p> <ul> <li>Header</li> <li>List</li> <li>Individual Todo</li> <li>Footer</li> </ul> <p>To create a component, we use the <code>ember generate component</code> command, followed by the name of the component. Let's create the header component first. To do so:</p> <ol> <li> <p>Stop the server running by going to the terminal and pressing <kbd>Ctrl</kbd> + <kbd>C</kbd>.</p> </li> <li> <p>Enter the following command into your terminal:</p> <div class="code-example"><div class="example-header"><span class="language-name">bash</span></div><pre class="brush: bash notranslate"><code>ember generate component header </code></pre></div> <p>These will generate some new files, as shown in the resulting terminal output:</p> <pre class="brush: plain notranslate">installing component create app/components/header.hbs skip app/components/header.js tip to add a class, run `ember generate component-class header` installing component-test create tests/integration/components/header-test.js </pre> </li> </ol> <p><code>header.hbs</code> is the template file where we'll include the HTML structure for just that component. Later on we'll add the required dynamic functionality such as data bindings, responding to user interaction, etc.</p> <div class="notecard note"> <p><strong>Note:</strong> The <code>header.js</code> file (shown as skipped) is for connection to a backing Glimmer Component Class, which we don't need for now, as they are for adding interactivity and state manipulation. By default, <code>generate component</code> generates template-only components, because in large applications, template-only components end up being the majority of the components.</p> </div> <p><code>header-test.js</code> is for writing automated tests to ensure that our app continues to work over time as we upgrade, add features, refactor, etc. Testing is outside the scope of this tutorial, although generally testing should be implemented as you develop, rather than after, otherwise it tends to be forgotten about. If you're curious about testing, or why you would want to have automated tests, check out the <a href="https://guides.emberjs.com/release/tutorial/part-1/automated-testing/" class="external" target="_blank">official Ember tutorial on testing</a>.</p> <p>Before we start adding any component code, let's create the scaffolding for the other components. Enter the following lines into your terminal, one by one:</p> <div class="code-example"><div class="example-header"><span class="language-name">bash</span></div><pre class="brush: bash notranslate"><code>ember generate component todo-list ember generate component todo ember generate component footer </code></pre></div> <p>You'll now see the following inside your <code>todomvc/app/components</code> directory:</p> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-components-directory.png" alt="the app components directory, showing the component template files we've created" width="285" height="244" loading="lazy"></p> <p>Now that we have all of our component structure files, we can cut and paste the HTML for each component out of the <code>application.hbs</code> file and into each of those components, and then re-write the <code>application.hbs</code> to reflect our new abstractions.</p> <ol> <li> <p>The <code>header.hbs</code> file should be updated to contain the following:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><input class="new-todo" aria-label="What needs to be done?" placeholder="What needs to be done?" autofocus /> </code></pre></div> </li> <li> <p><code>todo-list.hbs</code> should be updated to contain this chunk of code:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><section class="main"> <input id="mark-all-complete" class="toggle-all" type="checkbox" /> <label for="mark-all-complete">Mark all as complete</label> <ul class="todo-list"> <Todo /> <Todo /> </ul> </section> </code></pre></div> <div class="notecard note"> <p><strong>Note:</strong> The only non-HTML in this new <code>todo-list.hbs</code> is the <code><Todo /></code> component invocation. In Ember, a component invocation is similar to declaring an HTML element, but the first letter starts with a capital letter, and the names are written in <a href="/en-US/docs/Glossary/Camel_case">upper camel case</a>, as you'll see with <code><TodoList /></code> later on. The contents of the <code>todo.hbs</code> file below will replace <code><Todo /></code> in the rendered page as our application loads.</p> </div> </li> <li> <p>Add the following into the <code>todo.hbs</code> file:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><li> <div class="view"> <input aria-label="Toggle the completion of this todo" class="toggle" type="checkbox" /> <label>Buy Movie Tickets</label> <button type="button" class="destroy" title="Remove this todo"></button> </div> <input autofocus class="edit" value="Todo Text" /> </li> </code></pre></div> </li> <li> <p><code>footer.hbs</code> should be updated to contain the following:</p> <div class="code-example"><div class="example-header"><span class="language-name">html</span></div><pre class="brush: html notranslate"><code><footer class="footer"> <span class="todo-count"> <strong>0</strong> todos left </span> <ul class="filters"> <li> <a href="#">All</a> <a href="#">Active</a> <a href="#">Completed</a> </li> </ul> <button type="button" class="clear-completed">Clear Completed</button> </footer> </code></pre></div> </li> <li> <p>Finally, the contents of <code>application.hbs</code> should be updated so that they call the appropriate components, like so:</p> <div class="code-example"><div class="example-header"><span class="language-name">hbs</span></div><pre class="brush: hbs notranslate"><code><section class="todoapp"> <h1>todos</h1> <Header /> <TodoList /> <Footer /> </section> </code></pre></div> </li> <li> <p>With these changes made, run <code>npm start</code> in your terminal again, then head over to <code>http://localhost:4200</code> to ensure that the todo app still looks as it did before the refactor.</p> </li> </ol> <p><img src="/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-components-render.png" alt="todo app rendered in the browser with new todo input field and existing todos showing, both saying buy movie tickets" width="739" height="676" loading="lazy"></p> <p>Notice how the todo items both say "Buy Movie Tickets" — this is because the same component is being invoked twice, and the todo text is hardcoded into it. We'll look at showing different todo items in the next article!</p></div></section><section aria-labelledby="summary"><h2 id="summary"><a href="#summary">Summary</a></h2><div class="section-content"><p>Great! Everything looks as it should. We have successfully refactored our HTML into components! 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content are ©1998–2025 by individual mozilla.org contributors. Content available under <a href="/en-US/docs/MDN/Writing_guidelines/Attrib_copyright_license">a Creative Commons license</a>.</p></div></div></footer></div><script type="application/json" id="hydration">{"url":"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization","doc":{"body":[{"type":"prose","value":{"id":null,"title":null,"isH3":false,"content":"<ul class=\"prev-next\"><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_getting_started\"><span class=\"button-wrap\"> Previous </span></a></li><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries\"><span class=\"button-wrap\"> Overview: JavaScript frameworks and libraries</span></a></li><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_interactivity_events_state\"><span class=\"button-wrap\"> Next </span></a></li></ul>\n<p>In this article we'll get right on with planning out the structure of our TodoMVC Ember app, adding in the HTML for it, and then breaking that HTML structure into components.</p>\n<figure class=\"table-container\"><table>\n <tbody>\n <tr>\n <th scope=\"row\">Prerequisites:</th>\n <td>\n <p>\n At minimum, it is recommended that you are familiar with the core\n <a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content\">HTML</a>,\n <a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics\">CSS</a>, and\n <a href=\"/en-US/docs/Learn_web_development/Core/Scripting\">JavaScript</a> languages, and\n have knowledge of the\n <a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Command_line\">terminal/command line</a>.\n </p>\n <p>\n A deeper understanding of modern JavaScript features (such as classes,\n modules, etc.), will be extremely beneficial, as Ember makes heavy use\n of them.\n </p>\n </td>\n </tr>\n <tr>\n <th scope=\"row\">Objective:</th>\n <td>\n To learn how to structure an Ember app, and then break that structure\n into components.\n </td>\n </tr>\n </tbody>\n</table></figure>"}},{"type":"prose","value":{"id":"planning_out_the_layout_of_the_todomvc_app","title":"Planning out the layout of the TodoMVC app","isH3":false,"content":"<p>In the last article we set up a new Ember project, then added and configured our CSS styles. At this point we add some HTML, planning out the structure and semantics of our TodoMVC app.</p>\n<p>The landing page HTML of our application is defined in <code>app/templates/application.hbs</code>. This already exists, and its contents currently look like so:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">hbs</span></div><pre class=\"brush: hbs notranslate\"><code>{{!-- The following component displays Ember's default welcome message. --}}\n<WelcomePage />\n{{!-- Feel free to remove this! --}}\n\n{{outlet}}\n</code></pre></div>\n<p><code><WelcomePage /></code> is a component provided by an Ember addon that renders the default welcome page we saw in the previous article, when we first navigated to our server at <code>localhost:4200</code>.</p>\n<p>However, we don't want this. Instead, we want it to contain the TodoMVC app structure. To start with, delete the contents of <code>application.hbs</code> and replace them with the following:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><section class=\"todoapp\">\n <h1>todos</h1>\n <input\n class=\"new-todo\"\n aria-label=\"What needs to be done?\"\n placeholder=\"What needs to be done?\"\n autofocus />\n</section>\n</code></pre></div>\n<div class=\"notecard note\">\n<p><strong>Note:</strong> <a href=\"/en-US/docs/Web/Accessibility/ARIA/Attributes/aria-label\"><code>aria-label</code></a> provides a label for assistive technology to make use of — for example, for a screen reader to read out. This is useful in such cases where we have an <a href=\"/en-US/docs/Web/HTML/Element/input\"><code><input></code></a> being used with no corresponding HTML text that could be turned into a label.</p>\n</div>\n<p>When you save <code>application.hbs</code>, the development server you started earlier will automatically rebuild the app and refresh the browser. The rendered output should now look like this:</p>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-initial-render.png\" alt=\"todo app rendered in the browser with only the new todo input field showing\" width=\"741\" height=\"684\" loading=\"lazy\"></p>\n<p>It doesn't take too much effort to get our HTML looking like a fully-featured to-do list app. Update the <code>application.hbs</code> file again so its content looks like this:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><section class=\"todoapp\">\n <h1>todos</h1>\n <input\n class=\"new-todo\"\n aria-label=\"What needs to be done?\"\n placeholder=\"What needs to be done?\"\n autofocus />\n\n <section class=\"main\">\n <input id=\"mark-all-complete\" class=\"toggle-all\" type=\"checkbox\" />\n <label for=\"mark-all-complete\">Mark all as complete</label>\n\n <ul class=\"todo-list\">\n <li>\n <div class=\"view\">\n <input\n aria-label=\"Toggle the completion of this todo\"\n class=\"toggle\"\n type=\"checkbox\" />\n <label>Buy Movie Tickets</label>\n <button\n type=\"button\"\n class=\"destroy\"\n title=\"Remove this todo\"></button>\n </div>\n\n <input autofocus class=\"edit\" value=\"Todo Text\" />\n </li>\n\n <li>\n <div class=\"view\">\n <input\n aria-label=\"Toggle the completion of this todo\"\n class=\"toggle\"\n type=\"checkbox\" />\n <label>Go to Movie</label>\n <button\n type=\"button\"\n class=\"destroy\"\n title=\"Remove this todo\"></button>\n </div>\n\n <input autofocus class=\"edit\" value=\"Todo Text\" />\n </li>\n </ul>\n </section>\n\n <footer class=\"footer\">\n <span class=\"todo-count\"> <strong>0</strong> todos left </span>\n\n <ul class=\"filters\">\n <li>\n <a href=\"#\">All</a>\n <a href=\"#\">Active</a>\n <a href=\"#\">Completed</a>\n </li>\n </ul>\n\n <button type=\"button\" class=\"clear-completed\">Clear Completed</button>\n </footer>\n</section>\n</code></pre></div>\n<p>The rendered output should now be as follows:</p>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-with-todo-items.png\" alt=\"todo app rendered in the browser with new todo input field and existing todos showing, - buy movie tickets and go to movie\" width=\"741\" height=\"684\" loading=\"lazy\"></p>\n<p>This looks pretty complete, but remember that this is only a static prototype. Now we need to break up our HTML code into dynamic components; later we'll turn it into a fully interactive app.</p>\n<p>Looking at the code next to the rendered todo app, there are a number of ways we could decide how to break up the UI, but let's plan on splitting the HTML out into the following components:</p>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-ui-component-breakdown.png\" alt=\"code screenshot annotated to show what parts of the code will go into which component\" width=\"1393\" height=\"1096\" loading=\"lazy\"></p>\n<p>The component groupings are as follows:</p>\n<ul>\n<li>\n<p>The main input / \"new-todo\" (red in the image)</p>\n</li>\n<li>\n<p>The containing body of the todo list + the <code>mark-all-complete</code> button (purple in the image)</p>\n<ul>\n<li>The <code>mark-all-complete button</code>, explicitly highlighted for reasons given below (yellow in the image)</li>\n<li>Each todo is an individual component (green in the image)</li>\n</ul>\n</li>\n<li>\n<p>The footer (blue in the image)</p>\n</li>\n</ul>\n<p>Something odd to note is that the <code>mark-all-complete</code> checkbox (marked in yellow), while in the \"main\" section, is rendered next to the \"new-todo\" input. This is because the default CSS absolutely positions the checkbox + label with negative top and left values to move it next to the input, rather than it being inside the \"main\" section.</p>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-devtools-view.png\" alt=\"todo app looked at through devtools\" width=\"1125\" height=\"1005\" loading=\"lazy\"></p>"}},{"type":"prose","value":{"id":"using_the_cli_to_create_our_components_for_us","title":"Using the CLI to create our components for us","isH3":false,"content":"<p>So to represent our app, we want to create 4 components:</p>\n<ul>\n<li>Header</li>\n<li>List</li>\n<li>Individual Todo</li>\n<li>Footer</li>\n</ul>\n<p>To create a component, we use the <code>ember generate component</code> command, followed by the name of the component. Let's create the header component first. To do so:</p>\n<ol>\n<li>\n<p>Stop the server running by going to the terminal and pressing <kbd>Ctrl</kbd> + <kbd>C</kbd>.</p>\n</li>\n<li>\n<p>Enter the following command into your terminal:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">bash</span></div><pre class=\"brush: bash notranslate\"><code>ember generate component header\n</code></pre></div>\n<p>These will generate some new files, as shown in the resulting terminal output:</p>\n<pre class=\"brush: plain notranslate\">installing component\n create app/components/header.hbs\n skip app/components/header.js\n tip to add a class, run `ember generate component-class header`\ninstalling component-test\n create tests/integration/components/header-test.js\n</pre>\n</li>\n</ol>\n<p><code>header.hbs</code> is the template file where we'll include the HTML structure for just that component. Later on we'll add the required dynamic functionality such as data bindings, responding to user interaction, etc.</p>\n<div class=\"notecard note\">\n<p><strong>Note:</strong>\nThe <code>header.js</code> file (shown as skipped) is for connection to a backing Glimmer Component Class, which we don't need for now, as they are for adding interactivity and state manipulation. By default, <code>generate component</code> generates template-only components, because in large applications, template-only components end up being the majority of the components.</p>\n</div>\n<p><code>header-test.js</code> is for writing automated tests to ensure that our app continues to work over time as we upgrade, add features, refactor, etc. Testing is outside the scope of this tutorial, although generally testing should be implemented as you develop, rather than after, otherwise it tends to be forgotten about. If you're curious about testing, or why you would want to have automated tests, check out the <a href=\"https://guides.emberjs.com/release/tutorial/part-1/automated-testing/\" class=\"external\" target=\"_blank\">official Ember tutorial on testing</a>.</p>\n<p>Before we start adding any component code, let's create the scaffolding for the other components. Enter the following lines into your terminal, one by one:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">bash</span></div><pre class=\"brush: bash notranslate\"><code>ember generate component todo-list\nember generate component todo\nember generate component footer\n</code></pre></div>\n<p>You'll now see the following inside your <code>todomvc/app/components</code> directory:</p>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-components-directory.png\" alt=\"the app components directory, showing the component template files we've created\" width=\"285\" height=\"244\" loading=\"lazy\"></p>\n<p>Now that we have all of our component structure files, we can cut and paste the HTML for each component out of the <code>application.hbs</code> file and into each of those components, and then re-write the <code>application.hbs</code> to reflect our new abstractions.</p>\n<ol>\n<li>\n<p>The <code>header.hbs</code> file should be updated to contain the following:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><input\n class=\"new-todo\"\n aria-label=\"What needs to be done?\"\n placeholder=\"What needs to be done?\"\n autofocus />\n</code></pre></div>\n</li>\n<li>\n<p><code>todo-list.hbs</code> should be updated to contain this chunk of code:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><section class=\"main\">\n <input id=\"mark-all-complete\" class=\"toggle-all\" type=\"checkbox\" />\n <label for=\"mark-all-complete\">Mark all as complete</label>\n\n <ul class=\"todo-list\">\n <Todo />\n <Todo />\n </ul>\n</section>\n</code></pre></div>\n<div class=\"notecard note\">\n<p><strong>Note:</strong>\nThe only non-HTML in this new <code>todo-list.hbs</code> is the <code><Todo /></code> component invocation. In Ember, a component invocation is similar to declaring an HTML element, but the first letter starts with a capital letter, and the names are written in <a href=\"/en-US/docs/Glossary/Camel_case\">upper camel case</a>, as you'll see with <code><TodoList /></code> later on. The contents of the <code>todo.hbs</code> file below will replace <code><Todo /></code> in the rendered page as our application loads.</p>\n</div>\n</li>\n<li>\n<p>Add the following into the <code>todo.hbs</code> file:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><li>\n <div class=\"view\">\n <input\n aria-label=\"Toggle the completion of this todo\"\n class=\"toggle\"\n type=\"checkbox\" />\n <label>Buy Movie Tickets</label>\n <button type=\"button\" class=\"destroy\" title=\"Remove this todo\"></button>\n </div>\n\n <input autofocus class=\"edit\" value=\"Todo Text\" />\n</li>\n</code></pre></div>\n</li>\n<li>\n<p><code>footer.hbs</code> should be updated to contain the following:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">html</span></div><pre class=\"brush: html notranslate\"><code><footer class=\"footer\">\n <span class=\"todo-count\"> <strong>0</strong> todos left </span>\n\n <ul class=\"filters\">\n <li>\n <a href=\"#\">All</a>\n <a href=\"#\">Active</a>\n <a href=\"#\">Completed</a>\n </li>\n </ul>\n\n <button type=\"button\" class=\"clear-completed\">Clear Completed</button>\n</footer>\n</code></pre></div>\n</li>\n<li>\n<p>Finally, the contents of <code>application.hbs</code> should be updated so that they call the appropriate components, like so:</p>\n<div class=\"code-example\"><div class=\"example-header\"><span class=\"language-name\">hbs</span></div><pre class=\"brush: hbs notranslate\"><code><section class=\"todoapp\">\n <h1>todos</h1>\n\n <Header />\n <TodoList />\n <Footer />\n</section>\n</code></pre></div>\n</li>\n<li>\n<p>With these changes made, run <code>npm start</code> in your terminal again, then head over to <code>http://localhost:4200</code> to ensure that the todo app still looks as it did before the refactor.</p>\n</li>\n</ol>\n<p><img src=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization/todos-components-render.png\" alt=\"todo app rendered in the browser with new todo input field and existing todos showing, both saying buy movie tickets\" width=\"739\" height=\"676\" loading=\"lazy\"></p>\n<p>Notice how the todo items both say \"Buy Movie Tickets\" — this is because the same component is being invoked twice, and the todo text is hardcoded into it. We'll look at showing different todo items in the next article!</p>"}},{"type":"prose","value":{"id":"summary","title":"Summary","isH3":false,"content":"<p>Great! Everything looks as it should. We have successfully refactored our HTML into components! In the next article we'll start looking into adding interactivity to our Ember application.</p>\n<ul class=\"prev-next\"><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_getting_started\"><span class=\"button-wrap\"> Previous </span></a></li><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries\"><span class=\"button-wrap\"> Overview: JavaScript frameworks and libraries</span></a></li><li><a class=\"button secondary\" href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_interactivity_events_state\"><span class=\"button-wrap\"> Next </span></a></li></ul>"}}],"isActive":true,"isMarkdown":true,"isTranslated":false,"locale":"en-US","mdn_url":"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization","modified":"2024-12-19T15:37:45.000Z","native":"English (US)","noIndexing":false,"other_translations":[{"locale":"de","title":"Ember App-Struktur und Komponentisierung","native":"Deutsch"}],"pageTitle":"Ember app structure and componentization - Learn web development | MDN","parents":[{"uri":"/en-US/docs/Learn_web_development","title":"Learn"},{"uri":"/en-US/docs/Learn_web_development/Core","title":"Core learning modules"},{"uri":"/en-US/docs/Learn_web_development/Core/Frameworks_libraries","title":"JavaScript frameworks and libraries"},{"uri":"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Ember_structure_componentization","title":"Ember app structure and componentization"}],"popularity":null,"short_title":"Ember app structure and componentization","sidebarHTML":"<ol><li class=\"section\"><a href=\"/en-US/docs/Learn_web_development/Getting_started\">Getting started modules</a></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup\">Environment setup</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Installing_software\">Installing basic software</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Browsing_the_web\">Browsing the web</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Code_editors\">Code editors</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Dealing_with_files\">Dealing with files</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Environment_setup/Command_line\">Command line crash course</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website\">Your first website</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website/What_will_your_website_look_like\">What will your website look like?</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Creating_the_content\">HTML: Creating the content</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Styling_the_content\">CSS: Styling the content</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Adding_interactivity\">JavaScript: Adding interactivity</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Your_first_website/Publishing_your_website\">Publishing your website</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Getting_started/Web_standards\">Web standards</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Web_standards/How_the_web_works\">How the web works</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Web_standards/The_web_standards_model\">The web standards model</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Web_standards/How_browsers_load_websites\">How browsers load websites</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Getting_started/Soft_skills\">Soft skills</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Research_and_learning\">Research and learning</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Collaboration_and_teamwork\">Collaboration and teamwork</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Workflows_and_processes\">Workflows and processes</a></li><li><a href=\"/en-US/docs/Learn_web_development/Getting_started/Soft_skills/Job_interviews\">Succeeding in job interviews</a></li></ol></details></li><li class=\"section\"><a href=\"/en-US/docs/Learn_web_development/Core\">Core modules</a></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content\">Structuring content with HTML</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Basic_HTML_syntax\">Basic HTML syntax</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Webpage_metadata\">What's in the head? Webpage metadata</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Headings_and_paragraphs\">Headings and paragraphs in HTML</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Emphasis_and_importance\">Emphasis and importance</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Lists\">Lists</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_documents\">Structuring documents</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Advanced_text_features\">Advanced text features</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Creating_links\">Creating links</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Marking_up_a_letter\">Challenge: Marking up a letter</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Structuring_a_page_of_content\">Challenge: Structuring a page of content</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_images\">HTML images</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_video_and_audio\">HTML video and audio</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Mozilla_splash_page\">Challenge: Mozilla splash page</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_table_basics\">HTML table basics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Table_accessibility\">HTML table accessibility</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Planet_data_table\">Challenge: Structuring a planet data table</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/HTML_forms\">Forms and buttons in HTML</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Structuring_content/Debugging_HTML\">Debugging HTML</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics\">CSS styling basics</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/What_is_CSS\">What is CSS?</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Getting_started\">Getting started with CSS</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Styling_a_bio_page\">Challenge: Styling a biography page</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Basic_selectors\">Basic CSS selectors</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Attribute_selectors\">Attribute selectors</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Pseudo_classes_and_elements\">Pseudo-classes and pseudo-elements</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Combinators\">Combinators</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Box_model\">The box model</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Handling_conflicts\">Handling conflicts</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Values_and_units\">CSS values and units</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Sizing\">Sizing items in CSS</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Backgrounds_and_borders\">Backgrounds and borders</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Overflow\">Overflowing content</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Images_media_forms\">Images, media, and form elements</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Tables\">Styling tables</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Debugging_CSS\">Debugging CSS</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Fundamental_CSS_comprehension\">Challenge: Fundamental CSS comprehension</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Fancy_letterheaded_paper\">Challenge: Creating fancy letterheaded paper</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Styling_basics/Cool-looking_box\">Challenge: A cool-looking box</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling\">CSS text styling</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling/Fundamentals\">Fundamental text and font styling</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling/Styling_lists\">Styling lists</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling/Styling_links\">Styling links</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling/Web_fonts\">Web fonts</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Text_styling/Typesetting_a_homepage\">Challenge: Typesetting a community school homepage</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout\">CSS layout</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Introduction\">Introduction to CSS layout</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Floats\">Floats</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Positioning\">Positioning</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Flexbox\">Flexbox</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Grids\">CSS grid layout</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Responsive_Design\">Responsive design</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Media_queries\">Media query fundamentals</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/CSS_layout/Fundamental_Layout_Comprehension\">Challenge: Fundamental layout comprehension</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Scripting\">Dynamic scripting with JavaScript</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/What_is_JavaScript\">What is JavaScript?</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/A_first_splash\">A first splash into JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/What_went_wrong\">What went wrong? Troubleshooting JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Variables\">Storing the information you need — Variables</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Math\">Basic math in JavaScript — numbers and operators</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Strings\">Handling text — strings in JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Useful_string_methods\">Useful string methods</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Arrays\">Arrays</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Silly_story_generator\">Challenge: Silly story generator</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Conditionals\">Making decisions in your code — conditionals</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Loops\">Looping code</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Functions\">Functions — reusable blocks of code</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Build_your_own_function\">Build your own function</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Return_values\">Function return values</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Events\">Introduction to events</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Event_bubbling\">Event bubbling</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Image_gallery\">Challenge: Image gallery</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Object_basics\">JavaScript object basics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/DOM_scripting\">DOM scripting introduction</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Network_requests\">Making network requests with JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/JSON\">Working with JSON</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Scripting/Debugging_JavaScript\">Debugging JavaScript and handling errors</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries\">JavaScript frameworks and libraries</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Introduction\">Introduction to client-side frameworks</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/Main_features\">Framework main features</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_getting_started\">Getting started with React</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_todo_list_beginning\">Beginning our React todo list</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_components\">Componentizing our React app</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_events_state\">React interactivity: Events and state</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_interactivity_filtering_conditional_rendering\">React interactivity: Editing, filtering, conditional rendering</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_accessibility\">Accessibility in React</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Frameworks_libraries/React_resources\">React resources</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility\">Accessibility</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/What_is_accessibility\">What is accessibility?</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/Tooling\">Accessibility tooling and assistive technology</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/HTML\">HTML: A good basis for accessibility</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/CSS_and_JavaScript\">CSS and JavaScript accessibility best practices</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/WAI-ARIA_basics\">WAI-ARIA basics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/Multimedia\">Accessible multimedia</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/Mobile\">Mobile accessibility</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Accessibility/Accessibility_troubleshooting\">Challenge: Accessibility troubleshooting</a></li></ol></details></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Design_for_developers\">Design for developers</a></li><li><a href=\"/en-US/docs/Learn_web_development/Core/Version_control\">Version control</a></li><li class=\"section\"><a href=\"/en-US/docs/Learn_web_development/Extensions\">Extension modules</a></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects\">Advanced JavaScript objects</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_prototypes\">Object prototypes</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object-oriented_programming\">Object-oriented programming</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Classes_in_JavaScript\">Classes in JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Object_building_practice\">Object building practice</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Advanced_JavaScript_objects/Adding_bouncing_balls_features\">Challenge: Adding features to our bouncing balls demo</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs\">Client-side web APIs</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Introduction\">Introduction to web APIs</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Video_and_audio_APIs\">Video and Audio APIs</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Drawing_graphics\">Drawing graphics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Client-side_storage\">Client-side storage</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_APIs/Third_party_APIs\">Third-party APIs</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS\">Asynchronous JavaScript</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing\">Introducing asynchronous JavaScript</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS/Promises\">How to use promises</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS/Implementing_a_promise-based_API\">How to implement a promise-based API</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS/Introducing_workers\">Introducing workers</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Async_JS/Sequencing_animations\">Challenge: Sequencing animations</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms\">Web forms</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Your_first_form\">Your first form</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/How_to_structure_a_web_form\">How to structure a web form</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Basic_native_form_controls\">Basic native form controls</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/HTML5_input_types\">The HTML5 input types</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Other_form_controls\">Other form controls</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Styling_web_forms\">Styling web forms</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Advanced_form_styling\">Advanced form styling</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/UI_pseudo-classes\">UI pseudo-classes</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Form_validation\">Client-side form validation</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Forms/Sending_and_retrieving_form_data\">Sending form data</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_tools\">Understanding client-side tools</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_tools/Overview\">Client-side tooling overview</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_tools/Package_management\">Package management basics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_tools/Introducing_complete_toolchain\">Introducing a complete toolchain</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Client-side_tools/Deployment\">Deploying our app</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side\">Server-side websites</a></summary><ol><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/First_steps\">Server-side first steps</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/First_steps/Introduction\">Introduction to the server side</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/First_steps/Client-Server_overview\">Client-Server Overview</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/First_steps/Web_frameworks\">Server-side web frameworks</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/First_steps/Website_security\">Website security</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django\">Django web framework (Python)</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Introduction\">Django introduction</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/development_environment\">Setting up a Django development environment</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Tutorial_local_library_website\">Django Tutorial: The Local Library website</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/skeleton_website\">Django Tutorial Part 2: Creating a skeleton website</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Models\">Django Tutorial Part 3: Using models</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Admin_site\">Django Tutorial Part 4: Django admin site</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Home_page\">Django Tutorial Part 5: Creating our home page</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Generic_views\">Django Tutorial Part 6: Generic list and detail views</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Sessions\">Django Tutorial Part 7: Sessions framework</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Authentication\">Django Tutorial Part 8: User authentication and permissions</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Forms\">Django Tutorial Part 9: Working with forms</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Testing\">Django Tutorial Part 10: Testing a Django web application</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/Deployment\">Django Tutorial Part 11: Deploying Django to production</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/web_application_security\">Django web application security</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Django/django_assessment_blog\">Assessment: DIY Django mini blog</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs\">Express web framework (Node.js)</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/Introduction\">Express/Node introduction</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/development_environment\">Setting up a Node development environment</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/Tutorial_local_library_website\">Express Tutorial: The Local Library website</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/skeleton_website\">Express Tutorial Part 2: Creating a skeleton website</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/mongoose\">Express Tutorial Part 3: Using a Database (with Mongoose)</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/routes\">Express Tutorial Part 4: Routes and controllers</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/Displaying_data\">Express Tutorial Part 5: Displaying library data</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/forms\">Express Tutorial Part 6: Working with forms</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Server-side/Express_Nodejs/deployment\">Express Tutorial Part 7: Deploying to production</a></li></ol></details></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance\">Web performance</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/why_web_performance\">The \"why\" of web performance</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/What_is_web_performance\">What is web performance?</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/Perceived_performance\">Perceived performance</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/Measuring_performance\">Measuring performance</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/Multimedia\">Multimedia: Images</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/video\">Multimedia: video</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/JavaScript\">JavaScript performance optimization</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/HTML\">HTML performance optimization</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/CSS\">CSS performance optimization</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Performance/business_case_for_performance\">The business case for web performance</a></li></ol></details></li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing\">Testing</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/Introduction\">Introduction to cross-browser testing</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/Testing_strategies\">Strategies for carrying out testing</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/HTML_and_CSS\">Handling common HTML and CSS problems</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/Feature_detection\">Implementing feature detection</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/Automated_testing\">Introduction to automated testing</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Testing/Your_own_automation_environment\">Setting up your own test automation environment</a></li></ol></details></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Transform_animate\">Transform and animate CSS</a></li><li><a href=\"/en-US/docs/Learn_web_development/Extensions/Security_privacy\">Security and privacy</a></li><li class=\"section\">Further resources</li><li class=\"toggle\"><details><summary><a href=\"/en-US/docs/Learn_web_development/Howto\">How to solve common problems</a></summary><ol><li><a href=\"/en-US/docs/Learn_web_development/Howto/Solve_HTML_problems\">Solve common HTML problems</a></li><li><a href=\"/en-US/docs/Learn_web_development/Howto/Solve_CSS_problems\">Solve common CSS problems</a></li><li><a href=\"/en-US/docs/Learn_web_development/Howto/Solve_JavaScript_problems\">Solve common JavaScript problems</a></li><li><a href=\"/en-US/docs/Learn_web_development/Howto/Web_mechanics\">Web mechanics</a></li><li><a href=\"/en-US/docs/Learn_web_development/Howto/Tools_and_setup\">Tools and setup</a></li><li><a href=\"/en-US/docs/Learn_web_development/Howto/Design_and_accessibility\">Design and accessibility</a></li></ol></details></li><li><a href=\"/en-US/docs/Learn_web_development/About\">About</a></li><li><a href=\"/en-US/docs/Learn_web_development/Educators\">Resources for educators</a></li><li><a href=\"/en-US/docs/Learn_web_development/Changelog\">Changelog</a></li></ol>","source":{"folder":"en-us/learn_web_development/core/frameworks_libraries/ember_structure_componentization","github_url":"https://github.com/mdn/content/blob/main/files/en-us/learn_web_development/core/frameworks_libraries/ember_structure_componentization/index.md","last_commit_url":"https://github.com/mdn/content/commit/5b20f5f4265f988f80f513db0e4b35c7e0cd70dc","filename":"index.md"},"summary":"In this article we'll get right on with planning out the structure of our TodoMVC Ember app, adding in the HTML for it, and then breaking that HTML structure into components.","title":"Ember app structure and componentization","toc":[{"text":"Planning out the layout of the TodoMVC app","id":"planning_out_the_layout_of_the_todomvc_app"},{"text":"Using the CLI to create our components for us","id":"using_the_cli_to_create_our_components_for_us"},{"text":"Summary","id":"summary"}],"pageType":"learn-module-chapter"}}</script></body></html>