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The Customize component covers all aspects of the CustomizerCustomizer Tool built into WordPress core that hooks into most modern themes. You can use it to preview and modify many of your site’s appearance settings., WordPress’ framework for live-previewing any change to your site. Tickets in this component cover issues including bugs in the Customizer (wp-admin/customize.php), PHPPHP The web scripting language in which WordPress is primarily architected. WordPress requires PHP 5.6.20 or higher and JSJS JavaScript, a web scripting language typically executed in the browser. Often used for advanced user interfaces and behaviors. APIAPI An API or Application Programming Interface is a software intermediary that allows programs to interact with each other and share data in limited, clearly defined ways. improvements, UIUI User interface/UXUX User experience changes, new features, and improvements to the Customizer internals. For more information about the Customizer API, please see its official documentation in the Theme Developer Handbook.

Customizer development was most active from WordPress versions 3.9 through 4.9. As of WordPress 5.0, Customizer development is currently focused on bugbug A bug is an error or unexpected result. Performance improvements, code optimization, and are considered enhancements, not defects. After feature freeze, only bugs are dealt with, with regressions (adverse changes from the previous version) being the highest priority. fixes and smaller enhancements. More-significant feature development is ongoing as part of the integration of the GutenbergGutenberg The Gutenberg project is the new Editor Interface for WordPress. The editor improves the process and experience of creating new content, making writing rich content much simpler. It uses ‘blocks’ to add richness rather than shortcodes, custom HTML etc. https://wordpress.org/gutenberg/ project with the customizer. In tracTrac An open source project by Edgewall Software that serves as a bug tracker and project management tool for WordPress. and on GitHubGitHub GitHub is a website that offers online implementation of git repositories that can can easily be shared, copied and modified by other developers. Public repositories are free to host, private repositories require a paid subscription. GitHub introduced the concept of the ‘pull request’ where code changes done in branches by contributors can be reviewed and discussed before being merged be the repository owner. https://github.com/, new contributors are always welcome, whether you bring code, design help, testing, or anything else. Below is a summary of our larger past and future projects, which are accompanied by countless smaller changes.

Projects for Future Releases

• Incorporate blockBlock Block is the abstract term used to describe units of markup that, composed together, form the content or layout of a webpage using the WordPress editor. The idea combines concepts of what in the past may have achieved with shortcodes, custom HTML, and embed discovery into a single consistent API and user experience. editing with widgets in the customizer
• Expose UI for revisionsRevisions The WordPress revisions system stores a record of each saved draft or published update. The revision system allows you to see what changes were made in each revision by dragging a slider (or using the Next/Previous buttons). The display indicates what has changed in each revision. and branching/conflictconflict A conflict occurs when a patch changes code that was modified after the patch was created. These patches are considered stale, and will require a refresh of the changes before it can be applied, or the conflicts will need to be resolved. management of customize changesets
• Improve loading of the Customizer from the front-end (on hold, see #28602, #28661)
• Introduce inline editing/inline controls within the preview
• Explore content-editing/front-end-editing integration (integrated with the Gutenberg project)
• Improve performance wherever possible (ongoing goal)

For details on long-term goals and visioning for the customizer, see the proposed roadmap from 2015.

Feature Plugins

These plugins container implement features that may be incorporated into coreCore Core is the set of software required to run WordPress. The Core Development Team builds WordPress. in the future, as was done previously with Widget Customizer, Menu Customizer, Customizer UI Experiments, Customize Snapshots, and more.

• Customize Posts
• WP-API Customize Endpoints
• Customizer Browser History
• Customize Inline Editing
• Customize Object Selector
• Customize Pane Resizer

Completed Milestone Highlights

1. 4.9
   • A new experience for themes in the customizer – #37661
   • Changeset drafts, scheduling, linear/branching modes, autosave, locking, public preview links, and more
2.  4.8
   • Customizer sidebar width is now variable – #32296
   • Add indicator when additional widgetWidget A WordPress Widget is a small block that performs a specific function. You can add these widgets in sidebars also known as widget-ready areas on your web page. WordPress widgets were originally created to provide a simple and easy-to-use way of giving design and structure control of the WordPress theme to the user. areas are hidden – #39087
3. 4.7
   • Customize changesets (transactions) – #30937
   • Create pages in menus – #34923, #38164
   • Improve sliding panels UI – #34391, #34343, #29158
   • Custom CSS – #35395
4. 4.6
   • Settings Validation and Notification
5. 4.5
   • Selective Refresh (#27355)
   • Device Preview (#31195)
6. 4.4
   • Performance Improvements
7. 4.3
   • Menu Customizer
   • Site Icons
   • UI/UX Redesign (#31336)
8. 4.2
   • Customizer Theme Switcher
   • Support for mobile devices (#28784)
9. 4.1
   • Customizer JS API
   • JS-templated Customizer Controls
   • New Media Controls (#21483)
10. 4.0
    • Customizer Panels (#27406)
    • Contextual Controls (#27993)
11. 3.9
    • Widget Customizer
12. 3.4
    • Customizer Introduced in Core